862 ls heads - the 862's are off the early 4.8-5.3 motors after about 99 I believe. I also believe texas speed used to have the 2.05 valve opton on those heads at one time. I run 2.04 valves on mine. 12-30-2010, 08:54 AM #7. 1badmonza.

 
Our fellow tech writer and dyno-flogger Richard Holdener reports a gain of roughly 15 hp with stock 5.3-liter heads on a 6.0-liter. Our 5.7-liter head test bumped the average power by 9 hp but .... Becker online auction

Cast #: 706, 862. GM 4.8 5.3 V8 C#706, 862 Assembled Cylinder Head. $499.99 Price. Quantity. Add to Cart. Chevrolet GMC Cylinder Heads. This Chevy GMC Head is a new and improved casting; ... Our NEW Cylinder Heads are HIGH QUALITY and are superior to any rebuilt or remanufactured cylinder heads.If so, the 862 has a tiny 1.9 intake valve. The 317 head has 2.0 valve and a larger intake runner cc, like the LS6. The 862 in a good bench make 220ish cfm, 317s as much as 257 or so. Just has a larger combustion chamber.862 heads are good for boost because they have larger valves and can flow more air. They also have a higher compression ratio, which helps to increase power. ... If you’re looking for high performance from your LS engine, one of the first places you should look is the cylinder heads. The 862 castings from Cathedral Port are a great option for ...Suicidal Racing. 862 are for my ls1 an will make it around 11.9-1 compression and my lq9/ls3 combo will be around 13.5-1..the extra compression going from 10.2-1 on my ls1 to the 11.9-1 should be worth 30hp,the motor has a big cam (243/251 with 23 degrees of overlap) so it really needs the extra compression.Microsoft Excel features alignment options so you can adjust the headings in your worksheet to save space or make them stand out. For example, if a column heading is very wide, cha...933: Found on 1997 LS1 engines up to mid-September. Although 862 and 706 heads share many similarities, the primary difference is that the 706 heads are made using SPM (semi-permanent mold) while the 862 heads are not. This makes the 706 heads slightly superior. Cylinder Head. LS 5.3L 706 / 862 ALUMINUM CYLINDER HEAD CNC PORTING SERVICE ( CUSTOMER SUPPLIED BARE HEADS ) CNC Ported LS 5.3L 706 / 862 Cylinder Heads, Customer Supplied Bare Casting. $599.95. Options. Resurface for MLS Gaskets + $150.00. Valve Job with new Valve Guides + $400.00. Cylinder head Assembly + $150.00. Add to Cart. We have a few options you can purchase such as a pair of Stage 1, Stage 2, Stage 3, or Stage 4 LS 243/799 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.16 Jul 2021 ... Texas Speed F-35 Cam going into a Mega Truck Bog Brook Auto 207-261-1341.The factory 706 head casting may be the best LS performance value going. ... The 706 Vortec heads are even slightly superior to the commonly found 862 heads. The reason is that the 706 heads are ...May 21, 2023 · 863. Rectangle. 4.750" +- 0.003". 12604861. 12610716. 12675872. Share this article. We've tried to boil down the GM part numbers, casting numbers and other LS cylinder head information into an easily usable (and ideally definitive) cross reference. Note that we're not perfect and some of this data may not be perfect so use it for what you will. Description. 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.Feb 8, 2022 · I flow a stock 706, 862, and 317 LS Head and share the numbers. Get some merch and support the build and the channel. https://shanewhalleyracing.com/collectionsFollow me on social mediaFacebook: https://www.facebook.com/p...Conclusion. 862 cylinder heads are known for their excellent compression ability, which makes them suitable for racing cars. However, they have a history of cracking during usage, which might cause oil and fluids to leak into the engine. You should check the cons and pros before you port to 862 head, especially when you’re on a tight budget ...The 317 cylinder heads feature a distinctive intake port shape that resembles a cathedral and an exhaust port with a D-shape, coupled with a spacious combustion chamber that produces lower compression ratios. These heads are particularly suitable for turbo and supercharger applications and are compatible with 6.0L V8 LQ4 …Small Block Chevy LS Cylinder Heads by Casting Number 10215339 – LS Small Block V8 1997 346, LS1, aluminum, 68cc chambers . 12480005 – LS Small Block V8 2000 LS1, GTZ, aluminum, 38cc chambers, 2.125/1.625 valves, angle plugs . 12556743 – LS Small Block V8 1999 325, 5.3L, aluminum, truck, van . 125588065087 posts · Joined 2007. #1 · Dec 16, 2008. Some were looking for pictures of the new LS heads by World products. Here is what I found. The block also looks like it's new as well to work with the heads. 4. 2012 GMC …862 heads are aluminum cylinder heads with a high compression ratio and a cathedral-shaped intake port. They are compatible with LR4, LM4, and LM7 engines, but they may crack easily and need to be replaced. Learn more about their features, benefits, and drawbacks from this detailed overview.This test was a simple one involving a 5.3L LM7 equipped with the stock cam and factory 862 heads. To establish a baseline, we equipped the engine with a dual-plane Holley intake, a 650-cfm ...Find RHS Pro Action Chevrolet LS Cathedral Port Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! RHS Pro Action cathedral port aluminum cylinder heads are premium LS1 replacement heads for great power on any performance or stock engine build. They feature factory-correct intake manifold alignment slots—ensuring that …862 heads are aluminum cylinder heads with a high compression ratio and a cathedral-shaped intake port. They are compatible with LR4, LM4, and LM7 engines, but they may crack easily and need to be replaced. Learn more about their features, benefits, and drawbacks from this detailed overview.Crafted from high-quality aluminum, these 5.3 aluminum heads are both durable and lightweight. Whether you're into 5.3 Vortec heads or 706 ls heads for sale, our product fits the bill. With a year range spanning 99-06, these heads are compatible with a 5.3L - 327ci - V8 engine, making them versatile for various Chevy models.1231 posts · Joined 2007. #1 · May 12, 2013. Have a stock bottom and 5.3. The heads on it right now are 862's. I'm approaching 20psi on the engine. Would it be worth it to switch to some ported and milled .025 317 heads? Running pump gas/c16 mixed. 1980 Chevy luv truck. Stock 6.0.Learn about the history, design, and performance of different types of LS cathedral port cylinder heads, from factory to aftermarket. Find out the flow numbers, casting numbers, and dyno tests of various LS heads, including the 862 casting for the 5.3-liter LS1.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 horsepower.MLS Head Gasket for Notched 853, 862, 806 LS Heads Fits 1997-2013 4.8L 5.3L 5.7L LS-Based V8 Engines These gaskets are specifically designed for the 2001-earlier LS1, 4.8L truck and 5.3L truck heads that have a "notch" in the cylinder head deck, preventing them from sealing with a conventional MLS gasket. Can also be used on the …Jul 31, 2020 · The Gen III have 862/706 Gen III heads, and the Gen IV have 243/799 heads. The 862/706 heads have smaller combustion chambers than the Gen IV, raising the compression ratio when swapped directly. Find RHS Pro Action Chevrolet LS Cathedral Port Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! RHS Pro Action cathedral port aluminum cylinder heads are premium LS1 replacement heads for great power on any performance or stock engine build. They feature factory-correct intake manifold alignment slots—ensuring that …The LS3 was run with a Holley HP management system and FAST injectors. With stock heads, the modified LS3 combination produced 552 hp at 6,400 rpm and 513 ft-lbs of torque at 5,000 rpm. After installation of the TFS Gen X 255 heads, the power numbers jumped to 571 hp at 6,500 rpm and 525 ft-lbs of torque at 5,200 rpm.Re: LS 862 head porting. by mag2555 » Thu Jun 02, 2016 11:20 am. Take the wing out of the intake bowl and be dam sure to leave a Venturi in the Exh valve bowl below the seat cuts and if headers will be run be sure to leave the Exh port exit at the flange smaller then the inlet of the header tube , very much so on the floor, in fact do not ...7 Jan 2022 ... In this video - Erik shows you some simple porting and polishing techniques for LS aluminum cylinder heads! Time stamps and part ...Street Performance of The 706 Head. It’s worth noting that the 706 heads have a larger combustion chamber than the 862 heads, which measures at around 71cc. While this might sound like a disadvantage, it can actually be helpful for engines running on lower-octane fuel or those using forced induction.LSA and LS9 heads were basically an improvent on the LS3 head, but for emissions and improved driveability they have a flow vane in the intake port. These heads can be CNC ported to remove the vane …When I first built the 6.0 it was with the 862 heads and the Summit cam that was .612 lift. The cam said it would work with a single spring (don’t remember which) but they recommended the tfs .660 double spring kit. ... Going With The Flow - A Look At Ported Versus Unported LS Heads . Street car: FD RX7, PT8847 LS9, T56Mag, Holley …Check out Part 1 and Part 2 of our LS Spotter’s Guide.] ... behind top intake on block it has 12559767 on rear of block behind fly wheel is 12551358 with 862 heads. Mexican build gm plant motor, which is it , 4.8 or 5.3. Reply. Kerry D Browning says: December 14, 2023 at 11:35 am.I was using my computer the other day and it suddenly started to make a high-pitched squealing sound and then stopped working. When I took it in for repair, the service guy said th...Are you looking for a rental property near you? Finding the right place can be a daunting task, but with the right resources and information, you can get a head start on your searc...Jan 6, 2024 · The 862 heads came on all LQ9 6.0 engine blocks and are completely interchangeable with the 243 cylinder head. Both the 243 and 862 heads have the same 64cc combustion chamber, but there are some very slight differences in the pore size of the two heads. The 862 head is a rectangle port, while the 243 is a square port. #862 LS HEADS REBUILT PAIR. Heads have been cleaned Pressure tested. Guides checked and or replaced, valve seats cut on rottler head shop, surfaced .030 assembled with new seals and valve springs, This is for a pair of matching heads complete Shipping is for the pair No core charge or need to return any ...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 …[Editor’s Note: This L33 engine upgrade guide is part of a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing that we are sharing at OnAllCylinders. For a primer on the entire LS engine universe, read LS Engines 101: An Introductory Overview of the Gen III/IV LS Engine Family.]. The Gen. 3 aluminum block …Most importantly, 862 LS heads provide a lot of power at a cheap rate. Moreover, hundreds of thousands of old 862 heads built in 1999 are available in the exhaust port volume ranging from 4.8 to 5.3 L, often meant for truck heads. Why Casting 862 Heads Is A Great Choice? Casting 862 heads could be a great idea because of the following reasons:LS1 with 862 heads. I may have found an LS1 shortblock I can drop in my truck but I want to know if I can use the 862 heads from my 4.8 on the LS1. Also, what will the CR be if I use the 862's on the LS1. Thanks in advance. It will bump your CR up a hair, 4.8/5.3 heads and LS1 heads flow the same, the only difference is the combustion …Nov 18, 2022 · Most importantly, 862 LS heads provide a lot of power at a cheap rate. Moreover, hundreds of thousands of old 862 heads built in 1999 are available in the exhaust port volume ranging from 4.8 to 5.3 L, often meant for truck heads. Why Casting 862 Heads Is A Great Choice? Casting 862 heads could be a great idea because of the following reasons: Justin Cesler Writer Feb 28, 2013. Porting cylinder heads has long been a right of passage for serious hot rodders looking to add power on a modest budget. Armed with the right knowledge, the ...Cometic MLS Head Gasket FOR Honda LS/VTEC B20/VTEC 84mm Bore .030" C4193-030 Brand New : Cometic Gasket (11) 11 product ratings - Cometic MLS Head Gasket FOR Honda LS/VTEC B20/VTEC 84mm Bore .030" C4193-030GM LS1 Gen IV Cylinder Head 862 BIG VALVE LS3 Spring Milled 025 High Performance. Opens in a new window or tab. Remanufactured. $679.99. teauran_0 (515) 100%. or Best Offer. Free shipping. 1999-2008 Chevy Reman Cylinder Head casting #862/706 5.3 4.8 Pair (Both) Opens in a new window or tab. Description. 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. LS1 with 862 heads. I may have found an LS1 shortblock I can drop in my truck but I want to know if I can use the 862 heads from my 4.8 on the LS1. Also, what will the CR be if I use the 862's on the LS1. Thanks in advance. It will bump your CR up a hair, 4.8/5.3 heads and LS1 heads flow the same, the only difference is the combustion chamber.NEW ONLINE STORE!!!https://lsnasty.comhttps://lsnasty.comFollow The LS NastyChannel: http://youtube.com/lsnasty @ls.nastyLS Nasty700 N 13th StErwin NC 28339S...The head casting numbers are typically 706 or 862. To verify that Castech heads are installed and cracked: Remove the valve cover and valve rockers. Locate the Castech mark under the valve rockers. Small amounts of orange DexCool may be visible in the oil drain wells or around bolt heads (as shown in Figure 3). ...One of the most powerful figures in the company is leaving amid complaints that she enabled racial discrimination. Karen Parkin, Adidas’s head of human resources and one of its six...May 7, 2023 · Street Performance of The 706 Head. It’s worth noting that the 706 heads have a larger combustion chamber than the 862 heads, which measures at around 71cc. While this might sound like a disadvantage, it can actually be helpful for engines running on lower-octane fuel or those using forced induction. GM LM4 / LM7 / LR4 4.8L 5.3L Cylinder Heads PAIR # 862 w/ rocker arms OEM. $649.99. Free shipping. Check the item description to confirm this fits your vehicle. Hover to zoom.Jun 22, 2021 · The LS3 was run with a Holley HP management system and FAST injectors. With stock heads, the modified LS3 combination produced 552 hp at 6,400 rpm and 513 ft-lbs of torque at 5,000 rpm. After installation of the TFS Gen X 255 heads, the power numbers jumped to 571 hp at 6,500 rpm and 525 ft-lbs of torque at 5,200 rpm. 862 ls heads with notch head gasket. I have a set of 862 heads with the notch and I just had them surfaced.I didnt realize the notch thing on early ls engines so want to use these heads since I had some work done to them.I was wondering what head gaskets for this style of heads with 20 psi of boost.thanks in advance.LS1 LS3 LS7 243 799 862 706 317 CNC ported. LS1 LS3 LS7 243 799 862 706 317 CNC ported. top of page. Wilkes Performance 120 Hames Street Rainbow City, AL 35906 256-504-4685. Log In. ... LS/LT1 Series Heads. Quick View. WP 273cc 11deg LS3 6 bolt Casting. Price $2,008.00. Add to Cart. Quick View. Gen 5 LT1 CNC porting service. …6.0 Ls Swap S10 with slightly home ported exhaust port 862 heads off of my 5.3. BTR Ls1 Stage 3 cam, single plane intake. Holley Terminator on a base tune, n...20 Dec 2016 ... 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 ...243/317/799 LS6/LS2, 241/853/806 LS1, 821/LS3 & LSA/9, 823/L92, 706/862/5.3 LS1, 8452/LS7. GM 243, 799, & 317 LS2/LS6 Options: Performance Rebuild Package ... Our most powerful GM casting based LS head. Typical stock short block LS7's manage 590-640rwhp SAE with daily drivable hydraulic cam grinds. Proven capable of supporting …Richard Holdener. 291K subscribers. Subscribed. 2.7K. 172K views 4 years ago WESTECH PERFORMANCE GROUP. 706 5.3L HEADS vs 241, 799/243 vs 317s. …Shop Heads. FEEL FREE TO VISIT US. 706/ 862 CNC Cylinder Head Porting Service. $ 1,098.99. Add to cart. Category: Chevrolet. Description. Reviews (0) 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.Talkee lists some free party-line phone numbers are 712-432-7463, 218-862-3788 and 218-862-3784. Numbers for specific groups such as Afro, Anglo, Asian or gay groups are found on t...641 posts · Joined 2011. #1 · Dec 30, 2021. What size intake valve can I put in the 862 LS truck heads, going on a 5.3 engine? They are 1.89 right now and I was wondering if it would be worth putting a 2.02 valve in them with some port work. This will have a turbo and a decent size turbo cam. Thought about looking for some 243 or 317 …GM 4.8L 5.3L LS REMANUFACTURED Cylinder Heads 862 Assemblies w/Rocker Arms SET OF 2 706 (Renewed) Brand: Amazon Renewed. 2.8 2.8 out of 5 stars 5 ratings | Search this page . Price: $600.98 $600.98: This product is inspected, tested, and refurbished, as necessary to be fully functional according to Amazon Renewed standards.LS1 862 HEAD. SKU: MF-LS1-862 Category: LS Series Product ID: 4463. Description Description. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure ... Fits. The price listed is for you sending your cathedral port cylinder heads (4.8/5.3, LS1, LS6, LS2, LQ4/9) to us for porting. Our stage 1 porting service will include the re-use of the stock vales. Stage 2.5 will include aftermarket 2.02/1.57 stainless steel valves. We also offer valve spring upgrades. PRC CNC Porting/Machining Service Includes: One of the most powerful figures in the company is leaving amid complaints that she enabled racial discrimination. Karen Parkin, Adidas’s head of human resources and one of its six...Head gaskets are essential components of an engine, and when they fail, it can be a costly repair. Knowing the cost of head gasket repairs can help you budget for the repair and ma... the 862's are off the early 4.8-5.3 motors after about 99 I believe. I also believe texas speed used to have the 2.05 valve opton on those heads at one time. I run 2.04 valves on mine. 12-30-2010, 08:54 AM #7. 1badmonza. LS 5.3L 706 / 862 ALUMINUM CYLINDER HEAD CNC PORTING SERVICE ( CUSTOMER SUPPLIED BARE HEADS ) CNC Ported LS 5.3L 706 / 862 Cylinder Heads, Customer Supplied Bare Casting. $599.95. Options. Resurface for MLS Gaskets + $150.00. Valve Job with new Valve Guides + $400.00. Cylinder head Assembly + $150.00. Add to Cart. May 21, 2023 · 863. Rectangle. 4.750" +- 0.003". 12604861. 12610716. 12675872. Share this article. We've tried to boil down the GM part numbers, casting numbers and other LS cylinder head information into an easily usable (and ideally definitive) cross reference. Note that we're not perfect and some of this data may not be perfect so use it for what you will. A quickly poured beer or soda can create a layer of foam, but only one stays. Why does beer form a head but soda doesn't? Learn why at HowStuffWorks. Advertisement Pour a soda into...GM LS1 Gen IV Cylinder Head 862 BIG VALVE LS3 Spring Milled 025 High Performance. Opens in a new window or tab. Remanufactured. $679.99. teauran_0 (515) 100%. or Best Offer. Free shipping. 1999-2008 Chevy Reman Cylinder Head casting #862/706 5.3 4.8 Pair (Both) Opens in a new window or tab.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 …This test was a simple one involving a 5.3L LM7 equipped with the stock cam and factory 862 heads. To establish a baseline, we equipped the engine with a dual-plane Holley intake, a 650-cfm ...The LS engines with 799 heads are 5.3L and 4.8L. The sophisticated architecture, cathedral-shaped port, and smaller combustion chamber work amazingly on these truck engines. The smaller combustion chamber with a higher compression ratio offers increased power output. The 799 LS heads boost horsepower up to 25 hp.Mar 13, 2018 · 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 ... Re: LS 862 head porting. by mag2555 » Thu Jun 02, 2016 11:20 am. Take the wing out of the intake bowl and be dam sure to leave a Venturi in the Exh valve bowl below the seat cuts and if headers will be run be sure to leave the Exh port exit at the flange smaller then the inlet of the header tube , very much so on the floor, in fact do not ...Cylinder Heads & Camshaft Packages. Add 100+ horsepower to your GM LS or Gen 5 LT engine with a Texas Speed & Performance cylinder heads and camshaft package! Our packages will include cathedral port, square port, and rectangular port cylinder heads to accommodate LS1, LS2, LS3, L99, LS6, LS7, LSA, LQ4, LQ9, L83, L86, LT1, and more! …Remanufactured LS heads. Since we do attend a number of shows throughout the year. Unless otherwise stated. Fully Cleaned, leak checked, machined and reassembled. ... LS 862 Aluminum set of heads. Stover's Power Sports LLC (175) 100% positive; Seller's other items Seller's other items; Contact seller; US $650.00.CNC ported GM 862/706 Castings227cc intake runner, 84cc exhaust runner62cc chamberOur stage 1 will use stock valves in the 2.0/1.55 sizesold in pairs ... Canfield Big Block Cylinder Heads; SBF Cylinder Heads; SBC Cylinder Heads; LS Valve Covers; APPAREL. SERVICES. EQUIPMENT; OUR WORK. ABOUT US. More. CNC Ported …863. Rectangle. 4.750" +- 0.003". 12604861. 12610716. 12675872. Share this article. We've tried to boil down the GM part numbers, casting numbers and other LS cylinder head information into an easily usable (and ideally definitive) cross reference. Note that we're not perfect and some of this data may not be perfect so use it for what you will.According to LS 317 head specs and after my testing, I consider it an excellent option. They provide greater volumes of airflow (compared to the 243, for example). ... 706 Vs. 862 Heads. The 706 model is made to be superior to the common 862. The semi-permanent mold (SPM) method is a consistent process. ...The exhaust port is a unique D-shape that improves flow. LS6 heads are the best choice only when all-out power is needed. Be prepared for a big price tag at the dealer or steep core charge from your head porter. 706 & 852 & 862 Head: 1999+ LR4 4.8-liter Truck 1999+ LM4 / LM7 5.3-liter Truck Material:Aluminum Part Number: 12559852, …Learn about the history, design, and performance of different types of LS cathedral port cylinder heads, from factory to aftermarket. Find out the flow numbers, …The LS engines with 799 heads are 5.3L and 4.8L. The sophisticated architecture, cathedral-shaped port, and smaller combustion chamber work amazingly on these truck engines. The smaller combustion chamber with a higher compression ratio offers increased power output. The 799 LS heads boost horsepower up to 25 hp.You both pay the bills, and you both raise the kids, so does the IRS see you both as heads of households? Read more at HowStuffWorks. Advertisement Head of household is one of the ...Shop Heads. FEEL FREE TO VISIT US. 706/ 862 CNC Cylinder Head Porting Service. $ 1,098.99. Add to cart. Category: Chevrolet. Description. Reviews (0) 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.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... Conclusion. 862 cylinder heads are known for their excellent compression ability, which makes them suitable for racing cars. However, they have a history of cracking during usage, which might cause oil and fluids to leak into the engine. You should check the cons and pros before you port to 862 head, especially when you’re on a tight budget ...

[Trying to find an LS engine for a swap or build? Check out Part 1 and Part 2 of our LS Spotter’s Guide.] … Upgrading LR4 Cylinder Heads. 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.. Zales tallahassee

862 ls heads

GM LM4 / LM7 / LR4 4.8L 5.3L Cylinder Heads PAIR # 862 w/ rocker arms OEM. $649.99. Free shipping. Check the item description to confirm this fits your vehicle. Hover to zoom.Re: LS 862 head porting. by mag2555 » Thu Jun 02, 2016 11:20 am. Take the wing out of the intake bowl and be dam sure to leave a Venturi in the Exh valve bowl below the seat cuts and if headers will be run be sure to leave the Exh port exit at the flange smaller then the inlet of the header tube , very much so on the floor, in fact do not ...LS3 Cylinder Head Assembly • Aluminum performance head • Fits any LS family engine with 4.000" bore or larger • 2.165" hollow stem intake, and 1.590" solid stem exhaust valves • .550" max valve lift • As-cast L92 style intake ports • D-shaped exhaust ports • As-cast combustion chambers . Head P/N12629063 assembled with the following:Are you looking for a new shaver head for your Norelco electric razor? If so, you’ve come to the right place. In this article, we’ll provide you with all the information you need t...In terms of cylinder heads, we included the 706 small-valve 5.3L heads, the 241 (LS1), 317 (6.0L truck), and 799 (as a stand-in for the hallowed 243) heads. The idea was to flow and measure each ...862 heads for a 4.8L ? Got lucky at a local junkyard and snagged a set of 862 heads off a wrecked z71 2000-2006 body style. thinking about building these (port n polish, roller rockers, valves n springs to go with a nice cam) to put on my 06 gmc 4.8L . Am I correct in assuming these fit my motor?The L59 engine is a 5.3L Gen. III iron-block engine used in GM trucks and SUVs between 2002 and 2007. It is essentially the flex-fuel version of the LM7 . For marketing purposes, it was also known as the Vortec 5300. The engine specs and information listed here is for a stock L59 engine. Mechanically similar, General Motors’ …706 5.3L HEADS vs 241, 799/243 vs 317s. WHICH HEADMAKES MORE? We compared the four most popular stock LS heads in a back to back shootout. We ran the 706/862... the 862's are off the early 4.8-5.3 motors after about 99 I believe. I also believe texas speed used to have the 2.05 valve opton on those heads at one time. I run 2.04 valves on mine. 12-30-2010, 08:54 AM #7. 1badmonza. The 2007 year had three 5.3L motors offered. The 2007 Classic (still a NBS) had the 5.3L with either the L59 (flexfuel version) or the LM7. The 862/706s are on the 99 and up 4.8/5.3L motors. The only difference about the L59 motor was the injectors. 2005 and up motors had the factory electric fans and electric TB.Apr 15, 2022 · The LS engines with 799 heads are 5.3L and 4.8L. The sophisticated architecture, cathedral-shaped port, and smaller combustion chamber work amazingly on these truck engines. The smaller combustion chamber with a higher compression ratio offers increased power output. The 799 LS heads boost horsepower up to 25 hp. If you've ever needed to core a head of iceberg lettuce, either because you need to chop it up or you just want it easier to separate, there's an easier way than trying to carve ou...Dec 4, 2013 · 4135 posts · Joined 2010. #3 · Dec 4, 2013. I know you are on a budget, but once you clean, do a valve job and mill those 243s, you will have some cash in them. You could sell them for $400 or so, get a set of Stage 1 LS6 CNC ported heads for around $1200. I just think that is fantastic bang for the buck. .

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