862 ls heads.

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.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.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 …4 Dec 2019 ... Previously, we compared the stock 706/862 heads to the 799/243 heads on a cammed 5.3L test motor. There was much uproar among 799/243 head ...

The 823 cylinder head has a chamber of 65cc (cathedral style ports) or up to 70cc with the more commonly encountered rectangular ones. To produce the power these heads are noted for, the head has a very large intake port (257cc, 2.165-inch diameter) and an exhaust port capacity of 87cc (1.59-inch diameter). With advanced porting (such as those ...Small Block Chevy LS Cylinder Heads by Casting Number 10215339 – LS Small Block V8 1997 346, LS1, aluminum, 68cc chambers . 12480005 ... Casting Number 706 and 862 Head: 1999+ 4.8L / 5.3 Liter Truck Material: Aluminimum Part Number: 12559862 12561706 Combustion Chamber Volume: 61.15ccthe 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.

GM 4.8 5.3 V8 C#706, 862 Assembled Cylinder Head. $499.99. Quantity. Add to Cart. This Chevy GMC Head is a new and improved casting. The cylinder head is either sold complete with all new parts or bare. This is OEM replacement quality at a fraction of the cost. This Cylinder Head has an industry leading 2-year Warranty.

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 ...Feb 13, 2020 · 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 ... 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.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.

189 posts · Joined 2010. #1 · Jun 13, 2016. I've read a dozen posts about cracked LS heads between the valve seats, specifically 317 casting heads. This has got to be a very common problem, as I have six 317 head cores here and five of them are cracked between seats on atleast once cylinder. All of these heads were just cores pulled from …

GM Chevy 5.3 4.8 6.0 #862 Vortec LS Cylinder head Truck SUV GEN 3 OEM (NO CORE) Opens in a new window or tab. Remanufactured. $274.99. jerry194 (2,770) 98.7%. or Best Offer +$94.10 shipping. Chevy 4.8 / 5.3 Silverado GMC Sierra GM Vortec Cylinder Heads PAIR # 862 99-08. Opens in a new window or tab.

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:The 862 head features bigger valves than the stock LS (2.25” intake and 1.55” exhaust), so you can flow more air through your engine, giving you more power at higher RPMs, which leads to better …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 minimum recommended clearance is 0.035-inch, so you should be able to deck most blocks 0.010-inch without a problem, but be sure to check the piston protrusion before you install the heads. If ...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.[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.24 Oct 2019 ... Comments28 · LS 706 4 8L Heads · 243/799 Heads Porting Step 1 · Porting 862's Bowl cuts & Raising the roof · How to port your LS...

LS Barbie was a collection of photos by Ukrainian Angels Studio, also known as LS-Studio, a child-pornography ring, according to the Computer Crime Research Center.5087 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 … 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: 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. 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...In this story, we will dyno test three new LS cylinder heads and perform a camshaft swap on a 6-liter naturally aspirated LS Gen III (an LY6 truck engine). The important thing here is that in all ...862 heads being setup on a Max effort Pump Gas LS1 build. 2.00” Manley Pro Flow and OEM 1.55” valves. Mulled to true the deck surface only. Ports 215cc Intak...

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 …

4 Dec 2019 ... Previously, we compared the stock 706/862 heads to the 799/243 heads on a cammed 5.3L test motor. There was much uproar among 799/243 head ...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...[Trying to find an LS or LS-based Vortec engine for a swap or build? Check out Part 1 and Part 2 of our LS Spotter’s Guide.] … Upgrading LM7 Cylinder Heads. The stock heads can be CNC ported for more airflow and milled up to .030 in. for more compression. Flow numbers can be as high as 325 cfm at .600 lift.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...Generation III Internal Engine - 862 heads any good? - My friend has a pair of 862 heads in good shape for a good price. Just wanna know if I'll benifit from them at all from stock ls1 heads. I have a mild …[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 …GM Chevy 5.3 4.8 6.0 #862 Vortec LS Cylinder heads Truck SUV GEN 3 OEM (NO CORE) Opens in a new window or tab. Remanufactured. $274.99. jerry194 (2,684) 99.3%. or Best Offer +$95.15 shipping. 1 GM CHEVY 4.8 5.3 OHV LS4 SILVERADO TAHOE CYLINDER HEAD CAST# 706 & 862 99-05. Opens in a new window or tab.

In this story, we will dyno test three new LS cylinder heads and perform a camshaft swap on a 6-liter naturally aspirated LS Gen III (an LY6 truck engine).

862 is a 5.3 liter head. Smaller combustion chamber (61.5CC), increased CR. 241 is a 5.7 liter head. Larger combustion chamber. Gains from a higher ration rocker arm (1.8 vs 1.7) are going to be minimal. Expect approximately 10 peak HP. IMO, if you have any plans of adding a aftermarket camshaft later down the road, pass on the 1.8 ratio rockers.

862 is a 5.3 liter head. Smaller combustion chamber (61.5CC), increased CR. 241 is a 5.7 liter head. Larger combustion chamber. Gains from a higher ration rocker arm (1.8 vs 1.7) are going to be minimal. Expect approximately 10 peak HP. IMO, if you have any plans of adding a aftermarket camshaft later down the road, pass on the 1.8 ratio rockers.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 EnginesSwapping in 243 heads will increase flow a little, but unless you mill them first, you'll lose compression. If anything, you want to raise compression. For just a basic bolt-on 5.3, the 862 heads will do a decent job. Texas Speed has ported 5.3 heads for a reasonable price if you want more flow.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). ... 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 . 12558806 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 ...GM LS Cylinder Head Cross Reference. May 21, 2023 • XtremeCFM Staff. We've tried to boil down the GM part numbers, casting numbers and other LS cylinder …Get some merch and support the build and the channel. https://shanewhalleyracing.com/collectionsFollow me on social mediaFacebook: https://www.facebook.com/p...The 241 heads were used on 5.7L LS1 applications and are considered by many to be just a minor step up in performance from the 706. In terms of peak flow, the 241 heads offered 242 cfm at 0.700 ...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. 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 . 12558806 [Trying to find an LS or LS-based Vortec engine for a swap or build? Check out Part 1 and Part 2 of our LS Spotter’s Guide.] … Upgrading LM7 Cylinder Heads. The stock heads can be CNC ported for more airflow and milled up to .030 in. for more compression. Flow numbers can be as high as 325 cfm at .600 lift.

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). ...Heads-up displays (transparent displays that let drivers see data without looking down) are built-in on some modern luxury cars, but if you're not lucky enough to have one, here's ... 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 WORK & BIG VALVE. 5.3 truck heads (casting #862 and 706) are also a very popular base casting for porting/modifying, due to their even smaller (61.15cc) chamber size which raises compression when used on a LS1/6 engine.. 6.0 truck heads (casting #317) are popular heads with the forced induction crowd, as they are basically the same as 243 heads, but …Instagram:https://instagram. hoover gang los angelespepperpot southingtonrs3 aggression potiondales recycling prices American Airlines is reinforcing its position at the top of the pack in Hilton Head, South Carolina, with new flights to Chicago, Dallas/Fort Worth and Philadelphia next spring. Am... southern state parkway crash2005 chevy tahoe front suspension diagram A good shower doesn’t just get you clean; it also relaxes and refreshes the body and spirit. If your shower isn’t blissing you out, perhaps it’s time to upgrade to a shiny new show...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. kuta software infinite geometry spheres GM 5.3 LS Full #706-862 $ 450.00. 1986 and older Models: Buick Rainier Cadillac Escalade, Avalanche, Express, Silverado, SSR, Suburban, Trailblazer, Tahoe, GMC Envoy, Savana, Sierra, Yukon, Isuzu Ascender ... Performance Cylinder Heads. PROJECT X SERIES LS XXTREME SERIES SHOCKER SERIES MAXX SERIES SERIES ONE. …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.I’ve had some emails and messages, on the SierraC3TV Facebook page, making arguments against using 706 heads on my 6.0. In this episode, I give my reasons wh...