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LS3 heads & Its applications

The LS3 (6.2L, 376ci) hit the market in 2008 in the new C6 Corvette and ratcheted up the performance with the power output jumping to 430 horsepower! More strength was added to the LS3 block (which helped handle the power from the supercharged LS9 for the ZR1 Vette). The Pontiac G8 GXP also received the LS3 (415 hp). In 2010, the relaunched Camaro SS got the LS3 (426 hp) in the manual-equipped cars and an L99 (400 hp) version with Active Fuel Management (cylinder deactivation). The increased displacement was due to a bump in bore size to 4.065 inches. Add a 4.000-inch stroke and end up with a 415ci mill. In This Article What Are LS3 Heads? LS3 Heads Specifications Valve Sizes Porting Applications LS Heads FAQs Conclusion As we all know, an ls engine is nothing without a good set of ls heads. And when it comes to ls heads, the LS3 heads are some of the best you can get. But what exactly are LS3 heads? And what are their applications? What Are LS3 Heads? In a nutshell, LS3 heads are simply aftermarket cylinder heads that have been designed for ls engines. Typically, LS3 heads will offer improved airflow over stock ls heads, which can lead to increased power output. In addition, LS3 heads often feature larger valves and/or ported designs, which further improve airflow and power. So if you’re looking to get the most out of your ls engine, a set of LS3 heads is worth considering. LS3 Heads Specifications Material Make LS3 heads are often made from high-quality materials such as aluminum or titanium. This further improves airflow and helps to reduce weight compared to stock ls heads (which are typically made from cast iron). Reducing weight can be beneficial for several reasons, including improved performance and fuel efficiency. As far as specific materials go, many LS3 heads are made from A356-T6 aluminum. This is a high-strength aluminum alloy that’s commonly used in the aerospace industry. It’s also worth noting that some LS3 heads may feature castings or other components made from other materials, such as steel. Valve Sizes As you might expect, the valves on LS3 heads are usually larger than the valves on stock ls heads. This is because larger valves can flow more air, which can lead to increased power output. Common valve sizes for LS3 heads include 2.165 inches (intake) and 1.590 inches (exhaust). However, it’s not uncommon for LS3 heads to feature even larger valves. For example, some aftermarket LS3 heads may have 2.200-inch intake valves and 1.625-inch exhaust valves. Porting In addition to larger valves, many LS3 heads also feature ported designs. Porting refers to the process of enlarging and shaping the intake and exhaust ports. This can further improve airflow, which can lead to even more power. It’s also worth noting that some LS3 heads may feature other types of upgrades or modifications, such as CNC-machined combustion chambers. These sorts of modifications can further improve airflow and power output. Applications LS3 heads are most commonly used in performance applications where increased airflow and power are desired. LS3 heads are often used in racing engines where every last bit of power is needed. Additionally, LS3 heads can also be a good choice for street engines that will see occasional track use. This is because LS3 heads can help to make your engine more powerful and responsive, without sacrificing reliability. So if you’re looking for a set of ls heads that can offer improved performance, LS3 heads are worth considering. LS Heads FAQs How good are LS3 heads? Given that a stock LS3 head's flow rate is more than 315 cfm and can support over 650 horsepower on the proper application, increasing performance necessitates not only a decent set of aftermarket heads, but also an engine with plenty of power. The more air that goes through the engine, the more horsepower it generates. Are LS3 heads interchangeable? Rectangular intake ports are found on the LS7, L92, and LS3 heads. Interchangeability between blocks is available for all LS cylinder heads except the LS7 heads. Because of their wider valve layout, the LS7 cylinder heads cannot be used on other LS blocks. Are LS3 heads good for boost? Unlike the naturally aspirated engine, however, the LS3 heads produced more power under boost. The extra power, too, created greater backpressure. Boost pressure peaked at 7.6 psi at 7,000 rpm and fell to 6.4 psi at 7,500 rpm. How much power can LS3 heads make? The LS3 engine block may be boosted to 850 to 1,000 horsepower. Both engines feature rectangular port cylinder heads with a common 4.065-inch bore diameter and internally threaded oil passages for Active Fuel Management (AFM). Are LS2 and LS3 heads the same? But the most obvious difference between the two is the displacement. The LS2 has 6.0L of displacement and is technically the first Gen IV Chevrolet engine. The LS3, on the other hand, has 6.2L of displacement and is also a Gen IV Chevrolet engine. To no one's surprise, the LS3 heads are better than the LS2 heads. Can a stock LS3 handle a supercharger? The LS3 draws from the experience of earlier models in the LS family of engines. Even with a power adder, the factory LS3 bottom end can handle a significant amount of power. How do I get more power out of my LS3? Upgrading the LS3 Intake Manifold and Throttle Body The rectangular ports work well, although an aftermarket intake can still produce more power. Shorter runner intake manifolds and single-plane intakes make more top-end horsepower but may lose similar amounts of low-end torque. Conclusion If you are looking for LS3 heads, Allied Motor Parts is the best place to get them. Call us today. Related Products of LS3 Cylinder Heads: Chevrolet Cylinder Head LS3 Performance 250cc 75cc - New Assembled Aluminum NEW CNC Ported LS3 Cyl Heads .650 Springs 2.16/1.59 Valves PAIR Check out Our Other Articles: All About 243 LS Heads & Their Application 799 Heads & Its Application Are 862 Heads a Better Choice? Why Chevy 706 Heads LS Make a Great Choice? 13 Step Process for Remanufacturing Cylinder Heads Ford V10 Cylinder Head Replacement Cylinder Heads for the Chevrolet 350 - What You Need to Know Vortec Engine History and Cylinder Heads

LS3 heads are simply aftermarket cylinder heads that have been designed for ls engines. It improved airflow over stock ls heads, which can lead to increased power output.

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Mazda Protege 626 2.0L FS9 Cylinder Head

Part#: ALL-13035

Condition: Remanufactured - Exceeds OEM Specifications

Manufacturer: Mazda

Year Range: 00-03

Engine Size: 2.0L - 1991cc - L4

Description: 00-03 Mazda Protege 626 2.0L FS9 Cylinder Head

The cylinder head included in this listing will fit the vehicles listed below. It is also important to review / confirm the fitment notes above to assure the vehicle specifics of the head are correct for your application. If you have any question that this may not be the correct head for your vehicle or need help in locating the correct head, please contact us via phone or email prior to making a purchase.

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ALLIED MOTOR PARTS(823 Heads)

If you want to deliver real power and performance to your Pontiac or Camaro sports car (a guide to compatible vehicles is given below), the 823-cylinder head is a great addition.

First launched in 2008, installed in the C6 Corvette, General Motors’ LS3 series of engines took the power of their compact racers up to 430 horsepower and beyond. The new head castings were basically a reduced-size version of the LS7, first fitted on an Australian Escalade model in 2007.

The 6.2L, 376ci debut LS3 model demonstrated a firm commitment to power. Strongly built yet compact and lightweight, they kept a generation of speed enthusiasts happy until 2017. You’ll find these blocks in every GM brand of the era from GMC, Cadillac, and Pontiacs to Hummers and even Isuzu vehicles.

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Cylinder Head For All Makes & Models - Remanufactured Cylinder Head

Cylinder Head and Engine Parts - Cylinder heads are available for all makes and models. With a remanufactured cylinder head, you can get back on the road quickly.

Allied Motor Parts is an Expert Cylinder Head Remanufacturer. The company has over 150 years of remanufacturing light truck and automotive cylinder heads. Allied Motor parts houses their remanufactured cylinder heads inside their 25,000 square foot plant in Atlanta. The Company has a large selection of cylinder heads for sale that covers most makes and models today. Allied Motor Parts also do custom cylinder head building for hard to find parts and late models. Machinists at Allied motor Parts are experienced cylinder head remanufacturers and are capable of offering foreign and domestic cylinder heads at competitive prices.

 Listed below are the cylinder head service offered by Allied Motor Parts:

cylinder heads for all makes and models

repair and cylinder head exchange

aluminum welding

cast iron welding

CBN and PCD resurfacing

crack repair,

triple angle valve work

Allied Motor Parts Website: https://www.alliedmotorparts.com/

 Allied Motor Parts Cylinder Heads: https://www.alliedmotorparts.com/collections/cylinder-heads

 Check out Our Other Articles:

799 Heads & Its Application 

Are 862 Heads a Better Choice?

Why Chevy 706 Heads LS Make a Great Choice?

13 Step Process for Remanufacturing Cylinder Heads

Ford V10 Cylinder Head Replacement

Cylinder Heads for the Chevrolet 350 - What You Need to Know

Vortec Engine History and Cylinder Heads

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Visit Original Link

All About 799 LS Heads & Their Application

The 799 LS heads are some of the most popular heads used in LS engines. They offer excellent performance with increased horsepower making it a preferred choice for a porting job.

These 799 heads are the latest model and are made using the semi-permanent mold method. While they are similar to 2004 LS2 heads in terms of triangular casting, they do not require cleaning like the 243 heads.

The LS engines designed with 799 heads were 5.3L and 4.8L truck engines. The sophisticated architecture with a cathedral-shaped port allowed 799 heads to offer amazing performance on truck engines.  

If you are looking for 799 LS heads, Allied Motor Parts is the best place to get them. Call us today.

799 LS Heads Specifications

Ported 799 heads ensure high-quality performance and efficiency. However, before porting, you should make yourself aware of the specifications. For instance, the 799 cylinder heads come with a smaller combustion chamber than its counterparts. So porting to 799 LS heads would mean milling the cylinder heads to cover up for the bigger size of the former combustion chamber.

Material Make

The 799 heads have an aluminum build that can withstand high temperatures. Aluminum is a good material of choice because it is lightweight yet durable.

Intake Port Shape

The intake port forms the final part of the air induction system in an engine. It connects the intake manifold with the cylinder heads.

The 799 LS heads have a cathedral-shaped intake port. The shape is designed to increase airflow and power.

Exhaust Port Shape

The exhaust port in an engine is just as important as the intake. It is responsible for removing the spent gases from the cylinders.

The 799 LS heads have a D-shaped port. Typically, the D-shaped port helps increase the flow of exhaust gases.

Combustion Chamber Size

The combustion chamber is the space in the cylinder where the air/fuel mixture is ignited. The size of the chamber can affect power and efficiency.

The 799 LS heads have a smaller combustion chamber of 64cc. The configuration allows for a higher compression ratio, resulting in more horsepower.

Intake Valve Size

The valves are responsible for letting air and fuel into the cylinder and the exhaust from that combustion out of the cylinders. The size of the valves affects the performance of an engine. The 799 LS heads have 2.00-inch intake valve.

Exhaust Valve Size

The exhaust valve is responsible for expelling the burnt gases off the combustion chamber of an engine after the power stroke. Therefore, the size of the exhaust valve is an essential factor in determining how much power an engine can generate. The exhaust valve should ideally be 85 percent of the size of the intake valve.

The 799 LS heads have a 1.55-inch exhaust valve size.

Intake Port Volume

The intake port volume indicates the total amount of air that the engine can pull into the cylinders during the intake stroke. A larger port volume results in more power, decreasing fuel economy. The intake port volume for 799 LS heads is 209 cc.

Exhaust Port Volume

The exhaust port volume specifies the total amount of exhaust gas that can flow out of the cylinders during the exhaust stroke. The exhaust port volume for 799 LS heads is 74 cc.

Compression

In an internal combustion engine, the compression ratio is the ratio between the volume of the cylinder and combustion chamber at their maximum and minimum values.

In other words, compression ratio can be defined as the ratio of the volume of the cylinder and its head space when the piston is at the bottom dead center (BDC) and to the volume when the piston is at the top dead center (TDC).

799 cylinder heads have a compression ratio of 9.5:1.

Choosing the Right Cylinder Heads

For many people, selecting suitable cylinder heads can be pretty tricky. For example, should you opt for the Chevy 799 heads, or are the LS 243 cylinder heads better? Are the 799 heads on LS1 interchangeable? If you're uncertain, here are a few factors to consider before going for 799 heads.

Engine Displacement

The first thing you'll want to consider is the engine displacement, also known as cc. The 799 heads cc are smaller compared to its counterparts because of its smaller combustion chamber. It plays a significant role in selecting suitable heads because it will ultimately determine the compression ratio.

While large combustion chamber reduces the compression ratio, smaller combustion chamber produces more power due to increased compression ratio.

Cylinder Head Material

The material of the cylinder heads is another essential feature. Many ported 799 heads are made from aluminum, which is a good choice because it's both solid and lightweight. However, you may also find some heads made from cast iron.

These are usually reserved for larger engines because they can handle the increased displacement and power. But, they are also much heavier than aluminum heads, which can negatively affect performance.

Porting and Polishing

Another factor to consider is whether or not the heads have been ported and polished. Porting and polishing help improve airflow by opening the intake and exhaust ports. You'll want to consider it if you're looking for increased performance.

However, it's important to note that porting is a delicate process. If it's not done correctly, it can decrease performance.

Type of Vehicle

You also need to consider the type of vehicle you have. If you're going to be driving on the street, you won't need as much power as someone who will be racing their car.

You'll also want to consider how often you drive and what kind of conditions you'll be driving. For example, if you only drive on the weekends, you can probably get away with a less powerful engine. However, if you're planning to drive in hot weather or at high altitudes, you'll need an engine that can handle harsh conditions.

Compression Ratio

Finally, you'll want to take the compression ratio into account. A higher compression ratio means more power with less fuel in the cylinder and fewer exhaust gases. But, it also means more heat inside the engine.

Keep the above-mentioned points in mind when choosing the right cylinder heads. Take your time and compare your options before making a decision.

Get Your Hands on 799 Cylinder Heads

Finding 799 heads for sale can be a challenge, but you can get your hands on the perfect cylinder heads for your needs with the right resources and patience.

At Allied Motor Parts, we provide 799 LS heads for sale to customers who only want the best for their engines and do not compromise on quality or performance.

Additionally, we offer a wide variety of 799 heads to choose from, so you're sure to find the perfect match for your machine. So check out our selection of 799 heads today and get the power and performance you need.

Besides 799 heads, we also stock LS 243 cylinder heads for customers looking for a high-performance option. If you need any help finding the right set of heads for your engine, contact us, and we'll be happy to assist you.

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243 Heads: All About 243 LS Heads & Their Application

Initially, General Motors made seven different versions of the LS engine, and the majority of them had varying heads. The head names are indicated by the stamp on the valve cover that shows the three-digit head number.

The 243 heads were put on the LS6 engines. Initially, the heads were made for C5 Corvettes, used from 2001 to 2006. The LS6 was also used in some Camaros and Pontiac GTOs.

The 243 heads are cast out of aluminum alloy, and they feature larger intake and exhaust ports compared to other heads. They also have higher-lift camshafts, which allows for greater airflow.

The 243 heads come with 1.7-ratio rockers responsible for opening and closing the intake and exhaust valves. The configuration is different from the 1.8 ratios found on most other LS heads. The main benefit of this is that it allows for greater lift, which results in more airflow and more power.

If you want to buy 243 LS heads, Allied Motor Parts is just the place for it. Get in touch today.

Highlighting Features of 243 LS Heads

The LS6 had a stiff valve train coupled with an aggressive camshaft that made it perfect for the Corvettes at the time. Ported 243 heads can still be used today due to their many highlighting features.

Cylinder Block

The cylinder block is the foundation of the engine. It’s where the pistons, rods, and crankshaft are housed. The block is also where you’ll find the oil pan and water jacket.

The 243 heads were initially designed for the LS6 engine, which had a smaller 4.8L displacement. The LS6 cylinder block has many similarities with the V8, such as a 4.4-inch bore center and a 90-degree angle.

Rotating Assembly

The assembly of an engine that rotates is called the rotating assembly. It consists of the crankshaft, connecting rods, and pistons.

The LS6’s rotating assembly includes a forged steel crankshaft and powder metal connecting rods. The pistons are made from cast aluminum and have a hyper eutectic design. As a result, the LS6’s stroke is 3.62 inches shorter than the V8’s 4-inch stroke. It helps to create more torque at lower RPMs.

Meanwhile, the compression ratio of the LS6 is 10:1, which is higher than the V8’s 9.6:1 compression ratio. As a result, it helps the engine to produce more power.

Cylinder Heads

The cylinder heads are responsible for housing the intake and exhaust valves. They also have combustion chambers where the air/fuel mixture is combusted.

The 243 cylinder heads are made of aluminum with steel intake. The exhaust valves are at a 15-degree angle to maximize airflow. Other components of the 243 cylinder heads are roller-pivot rocker arms and beehive valve springs.

Roller-Pivot Rocker Arms: A rocker arm is a lever that transfers motion from the camshaft to the valves. The LS6’s rocker arms are made of investment-cast nodular iron, with a 1.7:1 ratio. They also have needle roller bearings to minimize friction.

Beehive Valve Springs: The beehive valve springs increase valve train stability at high RPMs. They are made of chrome silicone, and they can handle a lift of up to 0.550 inches.

Engine Management

The engine management system is responsible for controlling the air/fuel mixture, ignition timing, and idle speed. It does this by using sensors that monitor various engine parameters.

The LS6 engine is managed by the Engine Control Module (ECM). The ECM uses information from the following sensors:

Crankshaft position sensor

Throttle position sensor

Mass airflow sensor

Oxygen sensor

Coolant temperature sensor

The ECM uses this information to make real-time adjustments to the air/fuel mixture and ignition timing. Thus, it helps optimize engine performance and fuel economy.

Camshaft Design

The camshaft is responsible for opening and closing the intake and exhaust valves. It also controls the timing of these events.

The LS6 camshaft is made of forged steel, and it has a duration of 204 degrees. The lift is 0.480 inches, and the lobe separation angle is 112 degrees. The camshaft design is similar to 241 heads.

Intake Manifold

The intake manifold is responsible for delivering the air/fuel mixture to the cylinders. It has a cast aluminum build and a runner length of 12 inches.

The intake manifold has a lower plenum and an upper plenum. The lower plenum is where the air enters the manifold, while the upper plenum is where the air/fuel mixture is distributed to the cylinders.

The intake manifold in 243 LS heads has a 30-pound-per-hour fuel injector. The results from this intake manifold configuration later became the standard for LS1 243 heads due to their effectiveness.

24x Ignition System

All LS6 engines have a 24x crankshaft reluctor wheel. The wheel maintains a consistent relationship between the crankshaft position and the ECM. As a result, the ECM can provide accurate ignition timing control.

The LS6 also has a coil-near-plug ignition system. It means that there is one coil for each spark plug. The coil-near-plug ignition system is more efficient than the conventional distributor ignition system. As a result, it helps to improve engine performance and fuel economy.

Exhaust System

The exhaust system removes the combustion gases from the cylinders. It consists of the following parts:

Exhaust manifold

Catalytic converter

Muffler

The LS6 exhaust manifold is made of cast iron. It has a cross-over design, and it is connected to the catalytic converter with a stainless steel pipe. The catalytic converter is responsible for reducing emissions.

The muffler is located at the end of the exhaust system and helps in noise reduction. The LS6 engines have the same exhaust manifolds as their LS1 counterparts.

Difference Between LS and LS1

If you’re planning to buy LSO 243 heads, you should know how they differ from the LS configuration. There are three main differences between both engines.

Port Shape: The port shape of both heads is different. The LS6 has a D-shaped exhaust that facilitates a better flow. Meanwhile, the 241s have over-shaped exhausts that offer an intake flow of 200 cfm.

Valve System: The ported 243 heads have a sodium-filled, hollow valve system. It lowers the inertia of the valve train. However, this design is lacking in the 241 heads.

Combustion Chamber: The combustion chamber in 243 heads is 65cc while 241s has a 67cc combustion chamber. Due to this, the 243 heads have a higher compression ratio.

When looking for the ideal heads to pair with your LS engine, it is important to consider the airflow potential, port shape, and valve system. For example, the 243 heads offer better airflow, port shape, and valve system than 241s.

Purchasing 243 Heads

Purchasing 243 heads can be daunting because many vendors sell fake or used parts. Therefore, it is vital to buy your heads from a reputable vendor to ensure that you’re getting a quality product.

Moreover, make sure you compare the head types to find the best one for your needs. At Allied Motor Parts, we provide 243 heads for sale. So whether you’re looking for CNC ported 243 heads or Chevy 243 heads, we’ve got them all. We also offer a wide range of other LS performance parts.

Allied Motor Parts is the leading provider of LS performance parts. We have a team of experts that can help you choose the correct parts for your vehicle. Contact us today to learn more about our products and services.

This post was originally posted on: https://www.alliedmotorparts.com/blogs/news/243-heads-all-about-243-ls-heads-their-application

Related Products of 243 Cylinder Heads:

CNC Ported LS1/LS6 243/799 Cylinder Heads .650 Springs 2.02/1.59 Valves PAIR

Chevy Cylinder Head LS1/LS6 243/799, Year:97-04

Chevy Cylinder Head LS1/LS6 243/799 – PAIR, Year:97-04

NEW CNC Ported LS1/LS6 Cylinder Heads .650 Springs 2.02/1.59 Valves PAIR

Check out Our Other Articles:

799 Heads: All About 799 LS Heads & Their Application

Are 862 Heads a Better Choice?

Why Chevy 706 Heads LS Make a Great Choice?

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243 Heads: All About 243 LS Heads & Their Application

Initially, General Motors made seven different versions of the LS engine, and the majority of them had varying heads. The head names are indicated by the stamp on the valve cover that shows the three-digit head number. The 243 heads were put on the LS6 engines. Initially, the heads were made for C5 Corvettes, used from 2001 to 2006. The LS6 was also used in some Camaros and Pontiac GTOs. The 243 heads are cast out of aluminum alloy, and they feature larger intake and exhaust ports compared to other heads. They also have higher-lift camshafts, which allows for greater airflow. The 243 heads come with 1.7-ratio rockers responsible for opening and closing the intake and exhaust valves. The configuration is different from the 1.8 ratios found on most other LS heads. The main benefit of this is that it allows for greater lift, which results in more airflow and more power. If you want to buy 243 LS heads, Allied Motor Parts is just the place for it. Get in touch today. Highlighting Features of 243 LS Heads The LS6 had a stiff valve train coupled with an aggressive camshaft that made it perfect for the Corvettes at the time. Ported 243 heads can still be used today due to their many highlighting features. Cylinder Block The cylinder block is the foundation of the engine. It's where the pistons, rods, and crankshaft are housed. The block is also where you'll find the oil pan and water jacket. The 243 heads were initially designed for the LS6 engine, which had a smaller 4.8L displacement. The LS6 cylinder block has many similarities with the V8, such as a 4.4-inch bore center and a 90-degree angle. Rotating Assembly The assembly of an engine that rotates is called the rotating assembly. It consists of the crankshaft, connecting rods, and pistons. The LS6's rotating assembly includes a forged steel crankshaft and powder metal connecting rods. The pistons are made from cast aluminum and have a hyper eutectic design. As a result, the LS6's stroke is 3.62 inches shorter than the V8's 4-inch stroke. It helps to create more torque at lower RPMs. Meanwhile, the compression ratio of the LS6 is 10:1, which is higher than the V8's 9.6:1 compression ratio. As a result, it helps the engine to produce more power. Cylinder Heads The cylinder heads are responsible for housing the intake and exhaust valves. They also have combustion chambers where the air/fuel mixture is combusted. The 243 cylinder heads are made of aluminum with steel intake. The exhaust valves are at a 15-degree angle to maximize airflow. Other components of the 243 cylinder heads are roller-pivot rocker arms and beehive valve springs. Roller-Pivot Rocker Arms: A rocker arm is a lever that transfers motion from the camshaft to the valves. The LS6's rocker arms are made of investment-cast nodular iron, with a 1.7:1 ratio. They also have needle roller bearings to minimize friction. Beehive Valve Springs: The beehive valve springs increase valve train stability at high RPMs. They are made of chrome silicone, and they can handle a lift of up to 0.550 inches. Engine Management The engine management system is responsible for controlling the air/fuel mixture, ignition timing, and idle speed. It does this by using sensors that monitor various engine parameters. The LS6 engine is managed by the Engine Control Module (ECM). The ECM uses information from the following sensors: Crankshaft position sensor Throttle position sensor Mass airflow sensor Oxygen sensor Coolant temperature sensor The ECM uses this information to make real-time adjustments to the air/fuel mixture and ignition timing. Thus, it helps optimize engine performance and fuel economy. Camshaft Design The camshaft is responsible for opening and closing the intake and exhaust valves. It also controls the timing of these events. The LS6 camshaft is made of forged steel, and it has a duration of 204 degrees. The lift is 0.480 inches, and the lobe separation angle is 112 degrees. The camshaft design is similar to 241 heads. Intake Manifold The intake manifold is responsible for delivering the air/fuel mixture to the cylinders. It has a cast aluminum build and a runner length of 12 inches. The intake manifold has a lower plenum and an upper plenum. The lower plenum is where the air enters the manifold, while the upper plenum is where the air/fuel mixture is distributed to the cylinders. The intake manifold in 243 LS heads has a 30-pound-per-hour fuel injector. The results from this intake manifold configuration later became the standard for LS1 243 heads due to their effectiveness. 24x Ignition System All LS6 engines have a 24x crankshaft reluctor wheel. The wheel maintains a consistent relationship between the crankshaft position and the ECM. As a result, the ECM can provide accurate ignition timing control. The LS6 also has a coil-near-plug ignition system. It means that there is one coil for each spark plug. The coil-near-plug ignition system is more efficient than the conventional distributor ignition system. As a result, it helps to improve engine performance and fuel economy. Exhaust System The exhaust system removes the combustion gases from the cylinders. It consists of the following parts: Exhaust manifold Catalytic converter Muffler The LS6 exhaust manifold is made of cast iron. It has a cross-over design, and it is connected to the catalytic converter with a stainless steel pipe. The catalytic converter is responsible for reducing emissions. The muffler is located at the end of the exhaust system and helps in noise reduction. The LS6 engines have the same exhaust manifolds as their LS1 counterparts. Difference Between LS and LS1 If you're planning to buy LSO 243 heads, you should know how they differ from the LS configuration. There are three main differences between both engines. Port Shape: The port shape of both heads is different. The LS6 has a D-shaped exhaust that facilitates a better flow. Meanwhile, the 241s have over-shaped exhausts that offer an intake flow of 200 cfm. Valve System: The ported 243 heads have a sodium-filled, hollow valve system. It lowers the inertia of the valve train. However, this design is lacking in the 241 heads. Combustion Chamber: The combustion chamber in 243 heads is 65cc while 241s has a 67cc combustion chamber. Due to this, the 243 heads have a higher compression ratio. When looking for the ideal heads to pair with your LS engine, it is important to consider the airflow potential, port shape, and valve system. For example, the 243 heads offer better airflow, port shape, and valve system than 241s. Purchasing 243 Heads Purchasing 243 heads can be daunting because many vendors sell fake or used parts. Therefore, it is vital to buy your heads from a reputable vendor to ensure that you're getting a quality product. Moreover, make sure you compare the head types to find the best one for your needs. At Allied Motor Parts, we provide 243 heads for sale. So whether you're looking for CNC ported 243 heads or Chevy 243 heads, we've got them all. We also offer a wide range of other LS performance parts. Allied Motor Parts is the leading provider of LS performance parts. We have a team of experts that can help you choose the correct parts for your vehicle. Contact us today to learn more about our products and services. Related Products of 243 Cylinder Heads: CNC Ported LS1/LS6 243/799 Cylinder Heads .650 Springs 2.02/1.59 Valves PAIR Chevy Cylinder Head LS1/LS6 243/799, Year:97-04 Chevy Cylinder Head LS1/LS6 243/799 - PAIR, Year:97-04 NEW CNC Ported LS1/LS6 Cylinder Heads .650 Springs 2.02/1.59 Valves PAIR Check out Our Other Articles: Are 862 Heads a Better Choice? Why Chevy 706 Heads LS Make a Great Choice? 13 Step Process for Remanufacturing Cylinder Heads Ford V10 Cylinder Head Replacement Cylinder Heads for the Chevrolet 350 - What You Need to Know Vortec Engine History and Cylinder Heads

The 243 heads were put on the LS6 engines. Initially, the heads were made for C5 Corvettes, used from 2001 to 2006. The LS6 was also used in some Camaros and Pontiac GTOs.

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5 Signs Indicating Need Of Cylinder Head Repair

Do you suspect a problem with your engine? There’s a chance your cylinder head might be the culprit.

The cylinder head is a key component of your car’s engine. So, it’s critical to keep an eye on it to make sure it’s in tip-top shape.

Signs You Need to Replace Your Cylinder Head

No matter how many miles you’re putting on your car, every engine is due for repairs at some point. One of the most important components of your engine is the cylinder head.

So, if your cylinder head is damaged, and doesn’t get the repairs it needs, it can result in severe damage. This could ultimately ruin your engine, which is a highly expensive part to replace.

So, what symptoms signal the need for cylinder head replacement or repair? Let’s find out below:

Weak engine:

Cylinder heads play a key role in containing and directing the internal combustion of an engine’s cylinders. So, when a cylinder head isn’t working properly, the engine’s efficiency, power, and performance can take a hit.

Coolant leakage:

A cracked cylinder head can cause the coolant to leak. So, if you notice spills coming from the head and cylinder block or the “check engine temperature” warning light switching on, this could signal a bad cylinder head.

Oil leakage:

Just like it happens with the coolant, a crack in the cylinder head can cause oil to leak. Whether you notice oil leaking from underneath your car or the “check oil” icon lighting up, it could be a sign your cylinder head is bad.

Engine misfires:

With a severe crack in your cylinder head, the mixture in the combustion chamber will cause a misfire, meaning the mixture won’t burn as it should. As a result, you might find yourself repeatedly starting your car back up.

White smoke:

When exhaust leaks, this often causes the engine to smoke. Also, leaking oil can come in contact with hot engine components to produce this smoke. This is a rare occurrence.

Overheating:

Cylinder head cracking is a common problem in engines, which can lead to other issues. For example, a cracked cylinder head could go through to your coolant passages. This allows compression gases from the combustion cycle to fill those coolant passages, which displaces the coolant. The result is overheating in certain parts of the cylinder head.

If your vehicle is showing any of these signs, be sure to take it to a mechanic to fix the problem right away. The type of cylinder head service you receive will depend on the severity of the damage to your cylinder head.

However, if the damage to your cylinder head is more severe (i.e., engine misfires, smoking engine, etc.), this often signals that your cylinder head needs replacement as soon as possible. In this case, you’ll have two choices—a rebuilt cylinder head or a remanufactured cylinder head.

Check out our Recent Articles:

799 Heads: All About 799 LS Heads & Their Application

243 Heads: All About 243 LS Heads & Their Application

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Why Chevy 706 Heads LS Make a Great Choice?

Cylinder heads are the essential building blocks of an engine, and they play a vital role in the efficient operation of a vehicle. A right cylinder head ensures the engine’s performance and longevity, so it’s important to select the appropriate head for your car. Though multiple cylinder head options are available in the market, very few provide reliability and performance at an affordable cost. That being the case, Chevy 706 LS Heads guarantee a robust engine build for your car. 

Chevy 706 Heads come with all new stainless steel swirl polished 2.00 and 1.57 valves, new springs for up to .650 lift, new retainers, spring seats, and valve seals. The heads are washed, disassembled, pressure tested, and all valve stems have been replaced as per requirements. Scroll down to learn more about 706 heads.

Chevy 706 Heads- The Mechanical Powerhouse of Internal Combustion Engines

Chevy 706 LS Heads are high-performing cylinder heads that offer enormous power at an incredible price. They are the most affordable and most effective remanufactured cylinder heads that can be used for a 4.8L, 5.3L, and even 6.0L LS engine build. Their thin cross-section depicts a high-velocity and smaller-volume runner design with an excellent flow. 

Having been in the market for around a long time, the LS 706 cylinder heads are out-of-the-box and provide great performance engines. Dozens of dyno tests have shown the proven performance. Besides, the ported 706 heads are compatible with various Chevrolet-made vehicles of different models.

Casting 706 Heads

 The LS 706 Heads wound up on different models of the Chevy family and fit with the high-performing LM7, LR4, and LM4 5.3 engines. The engine specialists have remanufactured these high-geared cylinder heads at a much more affordable cost and make them the best-performing, cathedral-port factory heads out in the market. Below are its specifications.

706 5.3L Truck Castings

Valve size: Intake- 1.89, Exhaust-1.55

Port Volume: Intake- 197cc, Exhaust- 69cc

Combustion Chamber: 61.5 cc

 Benefits of Casting Chevy 706 Heads

      Most     affordable, powerful, and effective

  Superior to 862     heads in reliability and performance

  Flow is excellent     and superior to 317 heads, suitable for many builds

  Have smaller     chambers that forbid the compression loss

  Plentiful and     readily available in market

Read on to learn about why LS 706 heads are better than other popular cylinder heads.

Why are Chevy 706 Heads better than 317 or 862 Heads?

  706 Heads Vs.     317 Heads

Most people tend to prefer 317 heads as they have improved ports, same as 243 and 799 Heads, which are more expensive. However, 317 heads have larger combustion chambers of 71.06cc, which will cost performance, especially on a naturally aspirated engine. This compression loss ends up being a net horsepower loss for 317 heads, even with their superior ports. 

Dyno testing on an LM7 5.3L has proved that the 706 heads were worth 20 hp and 15 lb-ft over 317 heads, even with their slightly larger valves. Milling down the 317 heads is possible, but expensive to do. 

Though the 706 heads have smaller valves than 317 heads, they are still high performers keeping your compression ratio in the absolute spot. Thus, when it comes to cost versus performance, 706 heads in stock form are the king of the budget-friendly heads.

  706 Heads Vs.     862 Heads

The Chevy 706 LS Heads are semi-permanent mold (SPM) made and superior to the most common 862 heads, which are sand cast. The SPM method is a more consistent process, but porting 862 heads nullifies the difference between them. But again, porting costs cash, so 706 heads is the best choice to cast in stock form. 

Chevy 706- A Great Choice

Among other cylinder heads, 706 are solid performers that keep the combustion ratio in the right spot. The modified combustion chambers and high-velocity port technology offer these rebuilt cylinder heads impressive power gains at an economical cost. The 706 LS heads can also be upgraded with larger valves for even more high performance if you have the budget.

The heads come with great flow and smaller factory combustion chambers that refrain from compression into the basement, unlike other cylinder heads. They consistently improved the power output of the 5.3L engine by 20 hp. The rebuilt cylinder heads are also plentiful in scrap yards and come on hundreds of thousands of 1999 and up 4.8L and 5.3L engines. A large supply of these remanufactured cylinder heads balances the price.

Bottom Line

To sum up, the Chevy Vortec LS 706 heads have become the go-to-performance and swap heads of the modern era. They are budget-friendly, stand out amongst other heads, and will give you the most “bang for your buck” performance. A vehicle’s horsepower, torque, and throttle response largely depend on the performance of cylinder heads and the induction system. 

LS 706 heads, therefore, make the ideal choice for a high-performance vehicle. If you are in the market to pick up the right cylinder head, then the 706 LS Heads are a great choice, which will make your car a winner!

Source: https://www.alliedmotorparts.com/blogs/news/why-chevy-706-heads-ls-make-a-great-choice

Checkout our website and products:

Allied Motor Parts Website: https://www.alliedmotorparts.com/

Cylinder Head foe All Makes and Models: https://www.alliedmotorparts.com/collections/cylinder-heads

706 Heads & 862 Heads: https://www.alliedmotorparts.com/products/cnc-ported-lm4-lm7-706-862-cyl-heads-650-springs-2-00-1-57-valves-pair

243 Heads & 799 Heads: https://www.alliedmotorparts.com/products/cnc-ported-ls1-ls6-243-799-cyl-heads-650-springs-2-02-1-59-valves-pair

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13 Step Process for Remanufacturing Cylinder Heads

Like most auto parts, cylinder heads can eventually crack or fail for various reasons. A broken cylinder head can be fixed in three ways: buying a new cylinder head, rebuilding, and remanufacturing the cylinder head. While buying a new one is relatively expensive, remanufacturing or rebuilding cylinder heads are the preferred options for many due to their lower prices.

Rebuilding a cylinder head means only the broken components like springs, valves, injector sleeves, or guides will be fixed. It involves welding these cracks to fix the cylinder head and put them all together.

On the other hand, remanufacturing cylinder heads involves replacing every single component of the cylinder head with new specifications. Remanufacturing involves casting, cleaning, machining, installing new components, and testing the cylinder head.

Cracking of the cylinder head is the most common reason for engine breakdowns. While rebuilding a cylinder head costs the least, it’s not a definite solution for a longer run as the other pieces tend to fail going through countless heat cycles. So, remanufacturing cylinder heads is the best way out to replace a broken cylinder head. Though expensive, a remanufactured cylinder head will go through all the steps as in factories and ensure the they don’t crack in the future.

Remanufacturing a cylinder head involves a 13-step process. This article helps you analyze the steps that ensure the highest quality of remanufactured cylinder heads.

Let’s dive deep into the processes of Remanufacturing Cylinder Heads.

13- Step Process for Remanufacturing A Cylinder Head

Step 1: Dismantling

Initial tearing down is the first step involved in remanufacturing cylinder heads. Professionals remove valves, seats, guides, injector cups, and springs and visually inspect each part. They run quality control and structural tests to check if any of the components can be re-used. For instance, rebuilders inspect the entire valve for erosion pits.

Step 2: Preliminary Cleaning and Magnafluxing

Initial cleaning and magnafluxing is the next step in remanufacturing cylinder heads. It is a crucial step during the remanufactured cylinder process to identify cracks properly and evaluate structural integrity.

Measuring the surface thickness based on OEM specifications is also significant at this stage to understand where grinding needs to be done. The technicians should also have a look at the compression, warpage, and water port seal area.

Step 3: Deep Cleaning

The third step is deep cleaning in remanufacturing process. The rebuilt cylinder head is placed into the wash tank or steam-clean tank and heated to over 200 degrees Fahrenheit to eliminate the remaining component that is not part of the rebuilt cylinder head.

After the deep clean, the rebuilder taps the bolt holes and repairs cylinder heads as required. It is crucial to thoroughly clean the cylinder head as even a minuscule amount of dirt can impede the repairing or grinding process.

Step 4: Pressure Testing

Pressure testing the unit for additional structural integrity is the fourth step of a remanufactured cylinder head. This process involves pulling down water that may be present through any cracks. The guiding thread in between valves and around the seats is checked. After removing the cylinder head from the Newclear Pressure Regular Machine, it is vital to inspect the remanufactured cylinder head should be inspected for any warpage or shrinkage.

Step 5: Researching Head Parts

Determining what parts to be replaced is the fifth step in remanufacturing process. The part number and quantity are then verified. You can either replace them with brand new parts or use your internal OEM manufactured components. Also, you should replace guides, valves, and worn seat seats for all remanufactured cylinder heads.

Step 6: The Inventory Management Process

This is quite similar to the previous step, in which you choose the most appropriate parts to use in the process of remanufacturing the cylinder heads.

Step 7: Surfacing the Deck

The seventh step is surfacing the remanufactured cylinder head as required to ensure a better performance. Milling the top completely off the cylinder head is referred to as surfacing the deck. Hot welding techniques and metal stitching are typically used to repair cracks in the heads.

The cylinder heads rebuilt using the hot oven technique must be cooled in an insulated environment so the metals in the cast hold the weld.

Step 8: Installing the Injector Tubes Back

The next step involves installing the injector tubes back into the remanufactured cylinder heads. The professionals typically replace the injector tubes during the remanufacturing process. They place injector tubes back into holes with the help of a punching machine.

Injector tubes are used to confine the coolant passages along with the combustion chamber and are made either using brass, stainless steel, or copper.

Step 9: Pressure Testing the Rebuilt Heads Again

The remanufactured cylinder head has to go through the pressure test for the second time using the Newclear Pressure Regulator Machine. It is vital to pressure test a complete remanufactured cylinder head for the second time to guarantee the product’s coherence is maintained through the hot and cold-welding procedures.

Step 10: Preparing the Cylinder Head for Assembly

This step brings in the preparation of a remanufactured cylinder for the final fabrication as a product. Following the surfacing and pressure testing procedures, the rebuilt cylinder heads must be reassembled into the final form.

Step 11: Final Washing of the Finished Cylinder Heads

The eleventh step requires you to steam clean or use a wash tank to wash out the excess components such as grime and solvents stockpiled on the remanufactured cylinder head. The estimated number and the employee initials are stamped along with the serial numbers on the remanufactured cylinder heads only after the final washing.

Step 12: Painting & Packing of Remanufactured Heads

After assembling the entire package as one remanufactured cylinder head, the seat keepers are reassembled and then painted using industrial paints before the packaging. The paint that the rebuilders use in this process must nip rusting in its bud and should be capable of holding out against the environmental changes.

Step 13: Rust Prevention and Shipping Preparations

The final and thirteenth step of the remanufacturing process involves spraying a rust preventive oil and packing again. After coating the remanufactured cylinder head with rust-proof oil, the product will be wrapped in plastic and placed in a wooden box for shipping.

Thus, every remanufactured cylinder head is made with scrupulous detailing and effort. To get a remanufactured or rebuilt cylinder head, reach out to Allied Motor Parts. We offer the perfect cylinder heads for your vehicle at competitive prices. Check them out now!

Original Source: https://www.alliedmotorparts.com/blogs/news/13-step-process-for-remanufacturing-cylinder-heads

If you found this article helpful, feel free to visit our site https://www.alliedmotorparts.com/ for more helpful articles like this one.

Cylinder Head foe All Makes and Models: https://www.alliedmotorparts.com/collections/cylinder-heads

706 Heads & 862 Heads: https://www.alliedmotorparts.com/products/cnc-ported-lm4-lm7-706-862-cyl-heads-650-springs-2-00-1-57-valves-pair

243 Heads & 799 Heads: https://www.alliedmotorparts.com/products/cnc-ported-ls1-ls6-243-799-cyl-heads-650-springs-2-02-1-59-valves-pair

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Casting 862 Heads

Cylinder heads play the most crucial role in automobile engines. They take up the role of closing the combustion chamber engine from the top end. The engine’s upper part is the cylinder head which comes in various ranges such as 706 heads, 862 heads etc. 

The combustion chamber is closed off by the cylinder head, and 862 head, in this case, sits on the engine. Engine and cylinder head have a gap that is filled with head gasket. 

Casting cylinder heads 

862 head is the main structure of an engine and casting 862 head takes into account several parameters. Casting process counts factors such as:

·        durability,

·        resistance,

·        maintenance, and

·        pressure resistance during combustion.

By casting 862 LS heads, the material should resist vibration, high temperature, running condition and more. 

Henceforth the material utilized for casting cylinder head is significant. Several materials are employed to cast 862 LS heads, where a few of them are aluminium alloys, grey cast iron alloys, and compact graphite cast iron. 

Symptoms of 862 heads issues 

Though an automobile owner has 862 head or LM 4 engine head, there are few symptoms through which we can identify 862 cylinder head faults. Cylinder heads indeed collaborate during work with combustion chamber and head gasket. LM 4 engine heads in automobile help seal cylinders in a vehicle. But when an LM 4 engine or LM 7 cylinder heads or any other category of heads gets into trouble, you’ll notice the following:

The most standard issue with the LM 7     cylinder heads is the overheating issue due to the internal     combustion heat. 

Cracking or breaking of cylinder heads results     in poor engine performance. The above issue is evident as the engine never     runs properly and urges you to restart the car immediately. 

Ported 5.3 heads crack     at times and results in oil leakage. Hence, checking the engine for oil     leaks is an intelligent way. Ported 5.3 heads engine contains     oil that results in leakage. 

Another clear indicator of a faulty LM     4 5.3 cylinder head is the smoke that arises from the exhaust. In     this case, damage and crack in LM 4 5.3 cylinder head are     a bit serious and mandate immediate attention. 

Coolant measure declines, which stands as a     reason for the leak. Above condition is very clearly seen on cylinder     heads. The lack of coolant results in the heating up of the engine. 

There are different engines and cylinder heads accordingly; hence, having an assessment regularly on the cylinder heads is a great way to maintain proper working of the automobile. The cylinder heads casting material also plays a crucial part in cylinder head repairs. 

Fixing faulty cylinder heads 

As the cylinder head sets foot at its end of life, there are two ways to rectify a repaired cylinder head.

Remanufacture the cylinder head

Rebuilt the cylinder head

Remanufacturing cylinder heads 

Purchasing remanufacture cylinder head is an ideal option to replace the repaired cylinder head in an automobile. A remanufactured cylinder head does not fall under any substandard category. It passes through all the stages as a new cylinder head. A few of the steps are:

·        machining,

·        casting,

·        cleaning,

·        pressure testing, and

·        installing new parts.

The best aspect of remanufacture cylinder head is the extended warranty period it holds. 

Rebuilt cylinder heads

Rebuilt cylinder head is a primary option for many automobile owners as their cylinder heads encounter a fault. A rebuilt cylinder head is nothing but changing the damaged parts. Rebuilding, in other words, is repairing. Rebuilding usually starts by analysing and assessing each part, cleaning and identifying the ones with fault. The damaged parts are instantly replaced, also known as a quick fix. 

 The Bottom Line:

Cylinder heads play an imperative role in the performance of an automobile. Hence, regular checking of cylinder heads is essential in making the automobile work perfectly. There are ample categories of cylinder heads as per the engine. Gaining a deep knowledge from the casting process to fixing the cylinder heads is essential. Monitoring and nurturing the cylinder heads reap ample benefits. 

Allied Motor Parts Website: https://www.alliedmotorparts.com/

Cylinder Head For All Makes and Models: https://www.alliedmotorparts.com/collections/cylinder-heads

706 Heads & 862 Heads: https://www.alliedmotorparts.com/products/cnc-ported-lm4-lm7-706-862-cyl-heads-650-springs-2-00-1-57-valves-pair

243 Heads & 799 Heads: https://www.alliedmotorparts.com/products/cnc-ported-ls1-ls6-243-799-cyl-heads-650-springs-2-02-1-59-valves-pair

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Are Chevy 706 Heads Vortec LS any good?

If you’re looking for better automobile performance and minimized repairs, then inspecting cylinder head is often the best way. The cylinder head plays a vital role as it encloses the cylinder making the combustion chamber. 

The head also takes the role of providing the passage space for fuel and air towards the cylinder. Moreover, they also act as a path for the exhaust to escape. Hence, monitoring your cylinder, whether its   LM 7 cylinder heads or LM 4 5.3, is crucial. 

True Value of 706 Heads

Do you know that the Chevy 706 heads are the most operative and pocket-friendly heads appropriate for 4.8L or 5.3L? There have been several assessments run on Chevy 706 heads which have proved to provide escalated performance. The Chevy 706 LS heads come with better engineering with a great flow than other small combustion chambers. The best aspect of Chevy 706 LS heads is that it never declines the compression to the lower base. 

The Chevy LS 706 heads come thousands of 1999 and more with 4.8L and 5.3L engines. Hence the scarp yards are full. With Chevy LS 706 heads, there is a large supply leading to lower prices. Many heads in the market come with a larger combustion chamber that affects the performance, but chevy 706 heads are extraordinary. 

By conducting a dyno test on LM7 cylinder heads for 5.3L, the results were extraordinary. The chevy 706 heads portrayed 15lb-ft and worth 20 hp by making a comparison with other heads. By analyzing the performance as well as cost, these heads are the best choice. 

Porting the head

A Chevy ported 706 heads in the automobiles escalates the performance. Porting is the best upgrade for the car at budget-friendly rates. The exhaust and intake ports of internal combustion are altered by the porting process, resulting in better airflow. Henceforth, with ported 706 heads, the horsepower is extraordinary. Hence porting Chevy 706 heads makes wonders. 

Rebuilt, repaired, or remanufactured cylinder heads? 

When the cylinder head breaks, every owner hunts for inexpensive mending methods rather than purchasing a new one that burns a hole in the pocket. How to identify a repaired cylinder head? There are ample ways to know a repaired cylinder head and take immediate action. Some of them are 

Oil leakage

weak engine

Engine misfires

Coolant leakage

Smoke

There are two ways to opt while encountering a fault in the cylinder head, the rebuilt or remanufacture method. In that way, while the customer opts for a rebuilt cylinder head, the cylinder head that holds worn components are replaced. Rebuilding is nothing but repairing. For implementing a rebuilt cylinder head, the quick fix method of cleaning, analyzing, identifying, and fixing the head is followed. 

The problematic part in 706 heads may be the valve seats, valves, injector sleeves, valve guides. Another option for customers is the remanufacture cylinder head. In this method, the faulty part in the LM 4 5.3 heads are completely remanufactured. The best feature of opting remanufacture cylinder head option is the longer warranty period than the rebuild option offers. 

The Bottom Line

The chevy 706 heads are impeccable, with small chamber and port volumes. The 61.5cc combustion chamber and a splendid exhaust and intake port make chevy 706 heads Vortec LS the best. These heads are easily available and affordable too. The chevy 706 heads are greater than 862 heads with better flow. The best facet of the chevy 706 cylinder head is that the automobile does not lose compression due to smaller chambers. 

706 Heads/862 Heads: https://www.alliedmotorparts.com/products/cnc-ported-lm4-lm7-706-862-cyl-heads-650-springs-2-00-1-57-valves-pair

Cylinder Heads Collections:https://www.alliedmotorparts.com/collections/cylinder-heads

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Are 862 Heads a Better Choice?

With a plethora of automotive components available in the market, you may have a hard time knowing which cylinder heads are right for your vehicle. 862 LS Heads make the top choice when it comes to high-performing cylinder heads. Cylinder heads are the essential component of a vehicle and they determine the efficiency of the engine. They need to be robust, and be able to withstand high temperatures and immense pressures, without altering shape and form. The CNC Ported 862 LS heads stand atop with all these features, and assure efficient operation of a vehicle. Read on to learn more about 862 LS cylinder heads. CNC Ported 862 LS Heads- The Ultimate New Gen Cylinder Heads The CNC Ported 862 LS Heads are the most demanding cylinder heads in the modern era. They come with all new stainless steel swirl polished 2.00 and 1.57 valves, new springs for up to .650 lift, new retainers, spring seats, and valve seals. The remanufactured 862 heads exceed OEM specifications and have a myriad of other features. The 862 LS heads will fit different types of vehicles of various makes and models like Silverado, Tahoe, and Sierra, and are resurfaced with the polycrystalline diamond at 45 degrees, and seats ground with 3 angle valve jobs. The 862 heads are also the most affordable option and completely rebuilt for LM4, LM7, and 5.3LS engine builds. Read on to learn more about its features. Features Made of Aluminum, 862 heads are lightweight and they dissipate heat more efficiently. They provide better fuel economy and are often used in high-performance and race cars. Weight saving and rapid engine cooling are the other best features of casting 862 heads. Is it Worth Upgrading 862 Heads? Casting 862 heads proves beneficial even with the small valves of 1.89 intake, less than 2.00 valves, and smallest combustion chamber with the best compression ratio. They depict an excellent flowing head and provide higher compression. Beyond everything, 862 LS heads offer enormous power at a budget-friendly cost. Also, there are hundreds of thousands of 1999 862 heads and up to 4.8-5.3 truck heads: 61.15cc available to port. If you are still not convinced, read through to understand why casting 862 heads is a great choice. They are: Commonly found Best performing and affordable Highly reliable and equivalent to 706 heads Suitable for many builds Plentiful and easily available in market To add on, let’s compare 806 Heads to 706 Heads, another top-rated cylinder heads in the market. The 862 heads are virtually identical to 706 heads in most ways. They have the same valve size, port, and chamber cores. The difference lies in their compression ratio and make. While 862 heads are sand cast, 706 heads are semi-permanent mold. Also, they have smaller combustion chambers, and the milling of the deck surface will allow a slightly higher compression ratio than the 706 heads. Except for this, there is only a negligible difference between 706 and 862 heads. So, casting 862 heads would do favors for your car with a perfect set up. Last Words In a nutshell, the LS 862 heads are the best-performing, affordable, and ported 5.3 heads that will best suit your car. If you are looking for a high-performing cylinder head at an economical price, then the 862 LS heads are definitely a great choice. Tune in for more information or queries regarding cylinder heads or other automotive parts. About Allied Motor Parts: Allied Motor Parts is an Expert Cylinder Head Remanufacturer. The company has over 150 years of remanufacturing light truck and automotive cylinder heads. Allied Motor parts houses their remanufactured cylinder heads inside their 25,000 square foot plant in Atlanta. The Company has a large selection of cylinder heads for sale that covers most makes and models today. Allied Motor Parts also do custom cylinder head building for hard to find parts and late models. Machinists at Allied motor Parts are experienced cylinder head remanufacturers and are capable of offering foreign and domestic cylinder heads at competitive prices. Listed below are the cylinder head service offered by Allied Motor Parts: cylinder heads for all makes and models repair and cylinder head exchange aluminum welding cast iron welding CBN and PCD resurfacing crack repair, triple angle valve work Allied Motor Parts Website: https://www.alliedmotorparts.com/ Cylinder Head foe All Makes and Models: https://www.alliedmotorparts.com/collections/cylinder-heads 706 Heads & 862 Heads: https://www.alliedmotorparts.com/products/cnc-ported-lm4-lm7-706-862-cyl-heads-650-springs-2-00-1-57-valves-pair 243 Heads & 799 Heads: https://www.alliedmotorparts.com/products/cnc-ported-ls1-ls6-243-799-cyl-heads-650-springs-2-02-1-59-valves-pair

The CNC Ported 862 LS heads stand atop with all these features, and assure efficient operation of a vehicle. Read on to learn more about 862 LS cylinder heads.

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Why Chevy 706 Heads LS Make a Great Choice?

Cylinder heads are the essential building blocks of an engine, and they play a vital role in the efficient operation of a vehicle. A right cylinder head ensures the engine’s performance and longevity, so it’s important to select the appropriate head for your car. Though multiple cylinder head options are available in the market, very few provide reliability and performance at an affordable cost. That being the case, Chevy 706 LS Heads guarantee a robust engine build for your car.

Chevy 706 Heads come with all new stainless steel swirl polished 2.00 and 1.57 valves, new springs for up to .650 lift, new retainers, spring seats, and valve seals. The heads are washed, disassembled, pressure tested, and all valve stems have been replaced as per requirements. Scroll down to learn more about 706 heads.

Chevy 706 Heads- The Mechanical Powerhouse of Internal Combustion Engines

Chevy 706 LS Heads are high-performing cylinder heads that offer enormous power at an incredible price. They are the most affordable and most effective remanufactured cylinder heads that can be used for a 4.8L, 5.3L, and even 6.0L LS engine build. Their thin cross-section depicts a high-velocity and smaller-volume runner design with an excellent flow.

Having been in the market for around a long time, the LS 706 cylinder heads are out-of-the-box and provide great performance engines. Dozens of dyno tests have shown the proven performance. Besides, the ported 706 heads are compatible with various Chevrolet-made vehicles of different models.

Casting 706 Heads

The LS 706 Heads wound up on different models of the Chevy family and fit with the high-performing LM7, LR4, and LM4 5.3 engines. The engine specialists have remanufactured these high-geared cylinder heads at a much more affordable cost and make them the best-performing, cathedral-port factory heads out in the market. Below are its specifications.

706 5.3L Truck Castings

Valve size: Intake- 1.89, Exhaust-1.55

Port Volume: Intake- 197cc, Exhaust- 69cc

Combustion Chamber: 61.5 cc

Benefits of Casting Chevy 706 Heads

     Most affordable, powerful, and effective

 Superior to 862 heads in reliability and performance

 Flow is excellent and superior to 317 heads, suitable for many builds

 Have smaller chambers that forbid the compression loss

 Plentiful and readily available in market

Read on to learn about why LS 706 heads are better than other popular cylinder heads.

Why are Chevy 706 Heads better than 317 or 862 Heads?

 706 Heads Vs. 317 Heads

Most people tend to prefer 317 heads as they have improved ports, same as 243 and 799 Heads, which are more expensive. However, 317 heads have larger combustion chambers of 71.06cc, which will cost performance, especially on a naturally aspirated engine. This compression loss ends up being a net horsepower loss for 317 heads, even with their superior ports.

Dyno testing on an LM7 5.3L has proved that the 706 heads were worth 20 hp and 15 lb-ft over 317 heads, even with their slightly larger valves. Milling down the 317 heads is possible, but expensive to do.

Though the 706 heads have smaller valves than 317 heads, they are still high performers keeping your compression ratio in the absolute spot. Thus, when it comes to cost versus performance, 706 heads in stock form are the king of the budget-friendly heads.

 706 Heads Vs. 862 Heads

The Chevy 706 LS Heads are semi-permanent mold (SPM) made and superior to the most common 862 heads, which are sand cast. The SPM method is a more consistent process, but porting 862 heads nullifies the difference between them. But again, porting costs cash, so 706 heads is the best choice to cast in stock form.

Chevy 706- A Great Choice

Among other cylinder heads, 706 are solid performers that keep the combustion ratio in the right spot. The modified combustion chambers and high-velocity port technology offer these rebuilt cylinder heads impressive power gains at an economical cost. The 706 LS heads can also be upgraded with larger valves for even more high performance if you have the budget.

The heads come with great flow and smaller factory combustion chambers that refrain from compression into the basement, unlike other cylinder heads. They consistently improved the power output of the 5.3L engine by 20 hp. The rebuilt cylinder heads are also plentiful in scrap yards and come on hundreds of thousands of 1999 and up 4.8L and 5.3L engines. A large supply of these remanufactured cylinder heads balances the price.

Bottom Line

To sum up, the Chevy Vortec LS 706 heads have become the go-to-performance and swap heads of the modern era. They are budget-friendly, stand out amongst other heads, and will give you the most “bang for your buck” performance. A vehicle’s horsepower, torque, and throttle response largely depend on the performance of cylinder heads and the induction system.

LS 706 heads, therefore, make the ideal choice for a high-performance vehicle. If you are in the market to pick up the right cylinder head, then the 706 LS Heads are a great choice, which will make your car a winner!

Original Source: https://www.alliedmotorparts.com/blogs/news/why-chevy-706-heads-ls-make-a-great-choice

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Allied Motor Parts is an Expert Cylinder Head Remanufacturer. The company has over 150 years of remanufacturing light truck and automotive cylinder heads. Allied Motor parts houses their remanufactured cylinder heads inside their 25,000 square foot plant in Atlanta. The Company has a large selection of cylinder heads for sale that covers most makes and models today. Allied Motor Parts also do custom cylinder head building for hard to find parts and late models. Machinists at Allied motor Parts are experienced cylinder head remanufacturers and are capable of offering foreign and domestic cylinder heads at competitive prices.

Listed below are the cylinder head service offered by Allied Motor Parts:

·         cylinder heads for all makes and models

·         repair and cylinder head exchange

·         aluminum welding

·         cast iron welding

·         CBN and PCD resurfacing

·         crack repair,

·         triple angle valve work

 Allied Motor Parts Website: https://www.alliedmotorparts.com/

Allied Motor Parts Cylinder Heads: https://www.alliedmotorparts.com/collections/cylinder-heads

706 Heads & 862 Heads: https://www.alliedmotorparts.com/products/cnc-ported-lm4-lm7-706-862-cyl-heads-650-springs-2-00-1-57-valves-pair

243 Heads & 799 Heads: https://www.alliedmotorparts.com/products/cnc-ported-ls1-ls6-243-799-cyl-heads-650-springs-2-02-1-59-valves-pair

https://www.alliedmotorparts.com/products/96-05-chevy-4-3l-v6-262ci-140-772-vortec-cylinder-head

https://www.alliedmotorparts.com/products/80-86-chevy-5-0l-305ci-v8-sbc-601-cylinder-head

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Visit Original Link

Functions of Cylinder Head

 What is an Engine Cylinder Head

The engine cylinder head is an integral part of any engine. It is bolted onto the engine block and sealed with the cylinder head gasket. This closes the combustion chamber.

Function of an Engine’s Cylinder Head

Sitting on top of the engine’s lower end, the cylinder head function is to provide a clean air/fuel mixture for combustion and exhaust the spent mixture from the combustion chamber. An engine needs to breathe in the fresh air and breathe outspent air. An engine has a cylinder head to ‘breathe.’ It contains air passages, valves, springs, and possibly the camshaft. The camshaft, either through pushrods or directly, manipulates the valves to accomplish this intake and exhaust of the air. There are also oiling passages for the components lubrication and cooling passages to keep things from overheating.

How are Cylinder Heads Made

Engine cylinder heads are cast out of iron or aluminum. Once the cast is made, the cylinder head goes to be machined and cleaned up. Oil and coolant passages are cleared. The intake and exhaust runners are cleaned and cleared, as well as the mating surface and the valve pockets and seats.

Signs of a Defective Cylinder Head

The following signs of problems could indicate a cracked cylinder head, a need

for cylinder head repair, or need for a remanufactured cylinder head:

 ●     Loss of engine power

●     Vehicle overheats or is running hot

●     Observing oil in the coolant reservoir

●     Coolant level is frequently low

●     The odor of coolant when exiting the vehicle

●     Oil leak

●     The smell of burning oil when the engine is warm

Remanufactured Cylinder Head

A remanufactured cylinder head is a cylinder head that has been rebuilt with new parts. New valves, valve seats, seals, keepers, rockers, and bolts are typically installed. The cylinder heads are pressure tested to ensure they aren’t leaking and are crack-free. They are resurfaced, reassembled, and sometimes even repainted.

About Allied Motor Parts:

Allied Motor Parts is an Expert Cylinder Head Remanufacturer. The company has over 150 years of remanufacturing light truck and automotive cylinder heads. Allied Motor parts houses their remanufactured cylinder heads inside their 25,000 square foot plant in Atlanta. The Company has a large selection of cylinder heads for sale that covers most makes and models today. Allied Motor Parts also do custom cylinder head building for hard to find parts and late models. Machinists at Allied motor Parts are experienced cylinder head remanufacturers and are capable of offering foreign and domestic cylinder heads at competitive prices.

Listed below are the cylinder head service offered by Allied Motor Parts:

·         cylinder heads for all makes and models

·         repair and cylinder head exchange

·         aluminum welding

·         cast iron welding

·         CBN and PCD resurfacing

·         crack repair,

·         triple angle valve work

Allied Motor Parts Website: https://www.alliedmotorparts.com/

706 Heads & 862 Heads: https://www.alliedmotorparts.com/products/cnc-ported-lm4-lm7-706-862-cyl-heads-650-springs-2-00-1-57-valves-pair

243 Heads & 799 Heads: https://www.alliedmotorparts.com/products/cnc-ported-ls1-ls6-243-799-cyl-heads-650-springs-2-02-1-59-valves-pair

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Are 862 Heads a Better Choice?

With a plethora of automotive components available in the market, you may have a hard time knowing which cylinder heads are right for your vehicle. 862 LS Heads make the top choice when it comes to high-performing cylinder heads. Cylinder heads are the essential component of a vehicle and they determine the efficiency of the engine. They need to be robust, and be able to withstand high temperatures and immense pressures, without altering shape and form.

The CNC Ported 862 LS heads stand atop with all these features, and assure efficient operation of a vehicle. Read on to learn more about 862 LS cylinder heads.

CNC Ported 862 LS Heads- The Ultimate New Gen Cylinder Heads

The CNC Ported 862 LS Heads are the most demanding cylinder heads in the modern era. They come with all new stainless steel swirl polished 2.00 and 1.57 valves, new springs for up to .650 lift, new retainers, spring seats, and valve seals. The remanufactured 862 heads exceed OEM specifications and have a myriad of other features.

The 862 LS heads will fit different types of vehicles of various makes and models like Silverado, Tahoe, and Sierra, and are resurfaced with the polycrystalline diamond at 45 degrees, and seats ground with 3 angle valve jobs. The 862 heads are also the most affordable option and completely rebuilt for LM4, LM7, and 5.3LS engine builds. Read on to learn more about its features.

Features

Made of Aluminum, 862 heads are lightweight and they dissipate heat more efficiently. They provide better fuel economy and are often used in high-performance and race cars. Weight saving and rapid engine cooling are the other best features of casting 862 heads.

Is it Worth Upgrading 862 Heads?

Casting 862 heads proves beneficial even with the small valves of 1.89 intake, less than 2.00 valves, and smallest combustion chamber with the best compression ratio. They depict an excellent flowing head and provide higher compression. Beyond everything, 862 LS heads offer enormous power at a budget-friendly cost. Also, there are hundreds of thousands of 1999 862 heads and up to 4.8-5.3 truck heads: 61.15cc available to port.

If you are still not convinced, read through to understand why casting 862 heads is a great choice. They are:

Commonly found

Best performing and affordable

Highly reliable and equivalent to 706 heads

Suitable for many builds

Plentiful and easily available in market

To add on, let’s compare 806 Heads to 706 Heads, another top-rated cylinder heads in the market.

The 862 heads are virtually identical to 706 heads in most ways. They have the same valve size, port, and chamber cores. The difference lies in their compression ratio and make.

While 862 heads are sand cast, 706 heads are semi-permanent mold. Also, they have smaller combustion chambers, and the milling of the deck surface will allow a slightly higher compression ratio than the 706 heads. Except for this, there is only a negligible difference between 706 and 862 heads. So, casting 862 heads would do favors for your car with a perfect set up.

Last Words

In a nutshell, the LS 862 heads are the best-performing, affordable, and ported 5.3 heads that will best suit your car. If you are looking for a high-performing cylinder head at an economical price, then the 862 LS heads are definitely a great choice. Tune in for more information or queries regarding cylinder heads or other automotive parts.

About Allied Motor Parts:

Allied Motor Parts is an Expert Cylinder Head Remanufacturer. The company has over 150 years of remanufacturing light truck and automotive cylinder heads. Allied Motor parts houses their remanufactured cylinder heads inside their 25,000 square foot plant in Atlanta. The Company has a large selection of cylinder heads for sale that covers most makes and models today. Allied Motor Parts also do custom cylinder head building for hard to find parts and late models. Machinists at Allied motor Parts are experienced cylinder head remanufacturers and are capable of offering foreign and domestic cylinder heads at competitive prices.

Listed below are the cylinder head service offered by Allied Motor Parts:

cylinder heads for all makes and models

repair and cylinder head exchange

aluminum welding

cast iron welding

CBN and PCD resurfacing

crack repair,

triple angle valve work

Allied Motor Parts Website: https://www.alliedmotorparts.com/

Cylinder Head for All Makes and Models: https://www.alliedmotorparts.com/collections/cylinder-heads

706 Heads & 862 Heads: https://www.alliedmotorparts.com/products/cnc-ported-lm4-lm7-706-862-cyl-heads-650-springs-2-00-1-57-valves-pair

243 Heads & 799 Heads: https://www.alliedmotorparts.com/products/cnc-ported-ls1-ls6-243-799-cyl-heads-650-springs-2-02-1-59-valves-pair