862 heads | 862 head specs

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862 heads*******A user asks if 862 heads are worth buying for a mild cam LS1 engine. Other users reply with their opinions, suggestions and experiences on porting, polishing and comparing 862 heads with other . Learn everything you need to know about 862 heads, a type of cylinder heads that are sand-cast and have cathedral port intake runners. Find out how they .862 heads 862 head specs862 head is an option for the 4.6L and 5.4L Modular V-8 engines. This head is a great upgrade and a bolt-on option to increase power. The 862 heads flow well and come with upgraded valves, springs, and cams, making this a great upgrade package. The 862-cylinder head is one of the heads that you can pop in with decent gains.

The 862 heads’ compression ratio is known to be higher and more advanced than any similar product currently available on the market. The improved compression ratio allows the 862 cylinders to withstand more engine pressure and heat, demonstrated by the incredibly high heat dissipation rate and ignition speed. . The 799 head is designed and made to be compatible with high-performing LS engines, such as 4.8L, 5.3L, 5.7L, or 6.0L, etc. These vehicles require maximum airflow, making the 799 head an ideal choice. On the other hand, the 862 head is compatible with LR4, LM4, and LM7 and such engines where low torque is more essential than better . The 799 and 862 heads have their own pros and cons. While the 799 heads offer better flow and performance, the 862 heads offer better combustion chamber design and improved efficiency. Ultimately, the choice depends on the specific needs and goals of the engine. Pros of Using 862 Heads. Cons of Using 862 Heads.862 headsDescription. This program works on the following head casting numbers: 862. 706. Now you can get this porting service on your cylinder heads at an incredibly low cost! Simply follow this procedure: Remove the cylinder heads from your car. Disassemble cylinder heads to completely bare condition. Wash cylinder heads. Run with the 317 heads, the modified 5.3L produced 448 hp at 6,800 rpm and 398 lb-ft of torque at 5,000 rpm. After installation of the 706 heads, the power jumped to 468 hp at 6,800 rpm and 413 lb .

The 862 head is a popular choice among drag racing enthusiasts because of its exceptional airflow efficiency and small combustion chamber size. These two attributes translate to higher compression ratios, and in turn, improved power and torque outputs. The carefully designed intake and exhaust ports of the 862 heads ensure that the airflow is .862 heads and 706 heads both make up the top of the combustion chamber in engines. These cylinder heads need to withstand high temperatures and pressure. 862 Heads: These heads have smaller valves of 1.89 intake, less than 2.00 valves, and a small combustion chamber that results in a better compression ratio. They are known for .Our 706 & 862 ported heads include: Our in house CNC port. PCD surfaced to your desired chamber size. Proprietary competition valve job. Hand blended valve job. ***This is our most common setup, but if this doesn’t meet your needs please call us so we can get you set up to your needs***. Intake valve: 2.02 Exhaust: 1.57.The 862 heads are an excellent choice for any GM vehicle with an LM7 engine. Although the design is meant for high-performance settings, it performs well in the Avalanche, Express, Silverado, Sierra, Yukon, and other trucks or SUVs from the late 1990s to about 2007. You know if you’ve got an LM7 engine by looking at the eighth digit of the .

862 head specs This is a SET OF 2 Rebuilt OE Stock LS 4.8L , 5.3L Cylinder Heads Assemblies. * Part # : 862 casting also replaces 706 * Description : Stock LS Series 4.8L / 5.3L Cylinder Head. Compatible with LR4 / LM7 / LM4 Engines

we compared 243 heads to 862 heads, ported, chamber work & big valve. let's talk tech, anyone ever see a set of stock 243 heads flow 270+ cfm? we compared 243 heads to 862 heads, ported, chamber .I flow a stock 706, 862, and 317 LS Head and share the numbers. RPO L99 and LS3 cylinder heads are aluminum with 68cc combustion chambers, rectangle intake ports with 257cc runners, D-port exhaust with 87cc runners, 2.165˝ intake valves and 1.590˝ exhaust valves. These heads can be CNC-ported to improve on flow and milled for higher compression. These heads are almost the same, . This is a SET OF 2 Rebuilt OE Stock LS 4.8L , 5.3L Cylinder Heads Assemblies. * Part # : 862 casting also replaces 706 * Description : Stock LS Series 4.8L / 5.3L Cylinder Head. Compatible with LR4 / LM7 / LM4 Engines we compared 243 heads to 862 heads, ported, chamber work & big valve. let's talk tech, anyone ever see a set of stock 243 heads flow 270+ cfm? we compared 243 heads to 862 .

I flow a stock 706, 862, and 317 LS Head and share the numbers.

RPO L99 and LS3 cylinder heads are aluminum with 68cc combustion chambers, rectangle intake ports with 257cc runners, D-port exhaust with 87cc runners, 2.165˝ intake valves and 1.590˝ exhaust valves. These heads can be CNC-ported to improve on flow and milled for higher compression. These heads are almost the same, .We have a few options you can purchase such as a pair of Stage 1, Stage 2, Stage 3, or Stage 4 LS 706/862 Cathedral casting 5 axis CNC Porting with stainless valves and WP .660 dual race springs with WP titanium retainers. These heads have been disassembled, inspected, cleaned, 5 angle valve job, and milled slightly to clean up the heads.

There is no reason to put the weaker 862 head on an L33 when the engine comes with the best flowing cathedral port heads GM made. The L33 is basically a baby LS6 with a truck intake. I’m putting an L33 with factory 799s and an LS6 intake with a DBC T/B in a 2000 zr2 s10 4×4 (4000+lbs curb weight) with a 70mm turbo. .

Part 6 of the LS 5.3L Build will cover Installation of the 862 Aluminum Heads, Lifters, Pushrods, and Rocker Arms. Project Rowdy is a restoration on a 1979 J.

862 heads are often found in various GM Vortec engines. They are known for their reliability and longevity, making them an excellent choice for trucks and SUVs. If you prioritize durability and low-end torque over high-end power, the 862 heads might be the better option for your vehicle. In general, most LM7 owners will add boost or nitrous before they begin serious cylinder head work. Before we get into the power adders, there are a couple of things to address. 1. A 4-corner steam kit reduces hot spots that can cause the piston rings to butt and snap the piston’s ring lands. 2.

Elevate your Chevrolet engine's performance with our meticulously crafted CNC Ported LM4/LM7 706/862 Cylinder Heads. Designed for the 5.3L V8 engine (03-09), these heads surpass OEM standards, offering unparalleled power and efficiency. Featuring .650 springs and 2.00/1.57 valves, our ALL-20314PC heads are the ultimate upgrade for enthusiasts . Casting number 862 or 706 heads were used and sported a 61cc chamber but had tiny 1.890 intake valves. The stock heads can be CNC-ported for more airflow and milled up to .030 inch for more compression. Flow numbers can be as high as 325 cfm at .600-inch lift. Lightweight, hollow-stem LS3 valves can be cut to 2.040 inches to fit the .To get the best bang for your buck gen 3 lq4 + 862 Heads will give you a 10.5:1 compression ratio with smaller combustion chamber with a more responsive per.

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862 heads|862 head specs