862 ls heads vs 706. Show: Used Good 862/706 ls heads.

862 ls heads vs 706 The early sand cast heads come as 862s and 706's, and a die cast 706 that isn't made by castech. $25. 241. I pointed this out to him which he pointed out it also has electric tb. C $1,877. Part Number: ls-706n Category: GM. Reply reply Uptimasanctus Power to be had with these LS heads and cam swaps. 3L 862 and 706 Cylinder heads at CNC-Motorsports. this could of course be wrong, so only the track will 373/873 LQ4 iron heads - 71. Scroungers are known to CNC port the 862/706 heads to get them to outflow Buy GM 4. 31. LS/LT Cylinder Heads; Shaft Rocker Arms; Titanium Retainers; Lifters; SBC Cylinder Heads; Canfield Big Block Cylinder Heads; SBF Cylinder Heads; APPAREL. 706, the 862, and the 706 heads are awesome vehicle cylinder heads. 3, Silverado, Tahoe, Sierra, Resurfaced with the Poly Crystalline Diamond, all the valves are refaced at 45 degree, seats grinded with 3 angle At ModCo Racing, we specialize in precision cylinder head porting for both OEM and aftermarket heads, delivering unmatched power and efficiency for your engine. Add to cart. My factory 706's cracked. Like others have said, they are still way better than the old "Fuelie" small block heads of the past. 003" 12564825: LS2: 12562317: 243 317 319 799: Cathedral: We also ran similar times with a nearly identical motor that used the 706 heads with the smaller intake valve. 862 LS2 heads serve as one of the best options due to their high performance. Browse all. Performance fell of dramatically at 6500 with the 706 heads. I got a set of 862 heads from a local head reman shop who was familiar with the issue and installed them. However, My favorite though is when the “Do you have any XXX heads sitting around?” question comes out and I say “I don’t know. 050 numbers and cubes in a HP estimation calculator I’m getting that untouched 862’s should support 437chp in an HP range of 6300-7800 @ 292 cubic inches. Thanks guys! Reply. Luckily I had a set of LS1 intake valves sitting around to swap out and had a friend that works on cylinder heads and had all the tools to do the upgrade. $80. 799/243 are the same head just depends where they were made. 3L V8 706/862 Aluminum Cylinder Head - PAIR Introducing our 9-06 Chevy LS 5. 799 Vs 862 Heads: Detailed Comparison. Both 799 and 862 heads are the essence of high-performing engines. 5-65. My friend has a pair of 862 heads in good shape for a good price. 3 for sale supposedly out of a 2007 truck. 3L V8 706/862 Aluminum Cylinder Heads - a perfect upgrade for your vehicle's performance. Brand New. 8 LS, the 706 (or even the 862) heads are usually the preferred casting for most 5. 3L Cylinder Head. The 862's flow worse, but have smaller combustion chamber size. 750" +- 0. 3 truck heads (casting #862 and 706) are also a very popular base casting for porting/modifying, LS engines. 862/706 heads have higher velocity and better coefficient of discharge. EQUIPMENT; ABOUT US. The SPM method is a more consistent process, but porting 862 heads nullifies the difference between them. Sporting Goods. Designed for Chevy models from 1999 to 2006, these 706 heads for 5. 8L, 5. we have measured the 706/862 heads between 60. Seems like a lot. Texas Speed has ported 5. It has a fan which I thought 05 ups had electric fans. Also, they have smaller combustion chambers, and the milling of the deck surface will allow a slightly higher compression ratio than the 706 heads. On the other hand, the smooth finishing and precision of the 706 head make it more efficient. 2 were fleet trucks that keep boiling over coolant. In Stock (0) Reviews: Write first review. After adding coolant the second time I knew something was wrong. The semi-permanent mold (SPM) method is a consistent process. The 706 model is made to be superior to the common 862. I know I have a couple sets of LS heads sitting in the garage, but could NOT tell you for certain which ones they are. On the other hand, the 706 heads come with 1. The LS7 cylinder heads feature a wider valve layout when compared to all other LS cylinder heads. $459. Not crazy enough to try 862 / 706 heads on any 6. I'm hearing the 241 is good-where does the 862 come in at? The 241 is cnc'd the 862 is stock (would need port work) $400 vs $550 for the 241 set. It wouldn't have survived the kind of power we're seeing right out of the factory with the LS and now LT engines. 799 vs 862 heads which is better? I have a 99 5. 890" intake valve, 200cc intake runner, a 1. LT1, LS1 and LS6 Engines And cylinder heads for sale. There are 2 other sets of 706's that are not affected. 3L LS REMANUFACTURED Cylinder Heads 862 Assemblies w/Rocker Arms SET OF 2 706 (Renewed) Looking at both of these. Practice on a pair of those heads that cost somewhere between $50 and $100, per pair. Show: Used Good 862/706 ls heads. Shop now for fast shipping and easy returns! Skip to main GM 862 LS Heads Street Turbo Stainless 2. Stock Replacement. 660 Spring Kit, Have a few sets of 706 862 Ls heads $100 a pair Will not ship The LS guys 6902 Ne 23rd Oklahoma City Oklahoma City, OK. Got a refurb set of 706's and one cracked almost immediately (<~500 miles). $1,099. 02 valve upgrade for better intake flow and 1. I also asked about the 706/243 because price wise the 706 are cheaper but I read that they have smaller valves. Small amounts of My 2005 Silverado started losing coolant. 30 Results . It's also not only because the chamber size and compression ratio either. 3L engine, I discovered that the 799 made the most flow, but it couldn’t translate into power. Which factory LS cylinder head works best with a turbo, 706 or 317? It's the age-old comparison, airflow vs compression. The 243s, much like the 799s, are good for lowering compression in boosted applications (or if you’re willing to shave the heads a bit to bump the compression back up). Girard, KS. Track vid: link Dragzline Feature: link Advanced Induction CNC'd Dart/RHS 223cc Heads, Custom Cam Motion Cam, Brian Tooley . Price $2,199. These heads are professionally built heads that have been Marketplace 862/706 LS ported heads. We have a few options you can purchase such as a Home; Home › tea 706 heads › 706/862 LS CNC Ported Heads. Requires Shipping: Item Requires Shipping 706 Heads Vs. WHAT STOCK LS HEAD MAKES THE MOST POWER? WHICH CAM SHOULD I RUN IN MY 6. PROJECT X SERIES LS XXTREME SERIES SHOCKER SERIES MAXX SERIES SERIES ONE. Comparison Of Performance And Power. Michigan Motorsports' stainless valves are a great upgrade for your factory LS Brawler LS6 Style CNC Ported Cylinder Heads w/ TSP . Sponsored. Look for another set of 706 or 862 heads to replace the ones 706/862 CNC truck Ls Heads! 2. The LS3 lightweight, hollow stem intake valves are the WHAT IS THE MAX POWER I CAN MAKE WITH 317 LS HEADS? HOW WELL DO 317 HEADS WORK ON A 5. However, the 706 heads are more sophisticated than the 862 heads. The 706 heads are superior to the 862 heads because The only difference is that 862 heads are made of a stronger material than 706 heads, which are semi-permanent mold cast. The heads are Experimenting with porting the 862/706 heads using the smaller 1. Your account. 3 Liter Truck Material: Aluminimum Part Number: 12559862 I have an 05 cc z71 Silverado, VIN T. Yep I agree stock the combustion chamber volume is 61. 8L , 5. I’ve had some emails and messages, on the SierraC3TV Facebook page, making arguments against using 706 heads on my 6. Brian Tooley Racing offers Trick Flow LS cylinder head castings with valves. 5) No Valve Spring Kit; Supplied Springs w/ Heads for Install; Details Return Policy Fits; The With all PRC cylinder heads, quality and performance are our two highest priorities! In addition to this, OEM GM 862 cylinder heads removed & remanufactured at 32k miles. 0 6. i want to know if I CNC Porting service offered for GM 5. 1 and the 243/799 heads between 64. As a test I created a moderate 208cc intake port keeping the swirl ramp, r LS 706 Aluminum set of heads. 862 Heads. 0" like somebody said earlier in here thats crazy. 3 706 heads, our product fits seamlessly with your 5. 89” intake valve. 0L, had a friend with and lq9 6. 706, they offer more advantages compared to 706 heads, irrespective of the common challenge with 799 heads. 3 5. 3Truck heads ***reportedly came on a few corvette's too*** I’ve got 2 pairs of 99-07 Silverado LS base heads Set of 706 heads $100 pair of 2 Set of 862 heads $100 pair of 2 Crestline Ohio 44827 Location. 3 with traction issues. Stationary Bike. 799 Heads. 32. * Part # : 862 casting also . 8L / 5. I was orginally thinking of porting the 862 which are 5. I'd keep the 853s and mill them to get the compression back up, because they flow a little better. Skip to; Main At LS Performance Racing we understand that the Gen3 LM7 5. 3 head is approx. 99. Don't wait—experience the difference with our premium CNC Ported LM4/LM7 706/862 Cylinder Heads today! Ready to make the leap? Contact Allied Motor Parts today for more Cylinder Heads and Chevy Cylinder Heads options and take the first step towards unlocking your Chevrolet's full potential with our premium ported 706 heads, 706 ported heads, 706 LS heads - how'd I do? Post by KnightEngines » Mon Oct 14, 2019 5:04 am. Never ported a set of these before, I think the 706 and 862 castings have a lot of potential within the OE cathedral castings, yet they get passed over frequently in favor of 243 and 799. Katech CNC Porting Bundle LS1/Truck 862, 706 Cylinder Heads (PAIR) With NEW 2. 706/862 LS 5. 3 LM7 aiming for 450-500HP. Customer Service 605-692-1697. Restricted User . 3 heads. 862 99 and up 4. 5cc chambers, while the 706 heads feature 61. Like the 317s, the 241 heads out-flowed the 706 Which Heads are Better 706 Vs 862? There are a few things to consider when deciding which heads are better for your engine. If you’re contemplating 799 heads vs. Those original heads were 706's. Is it worth going to get 243’s and put them on? Quick tips for porting and polishing any LS heads My IG: 13b_dorito Here is some useful links for tools that you need to get this job done and that you will Well i acquired some milled/p&p 706 5. $220. 4 with -2CC pistons which should be about 11. • Any broken exhaust studs are removed, and all threaded holes are checked, none are stripped. SKU: KAT-A7230. Part # : 706 , 862 also fits. So, it will become a really tough choice In this post, we'll take a closer look at what exactly 706 heads are, their background, and why they matter when it comes to squeezing out every ounce of power from your engine. Yeah I was expecting to open this thread and have it be about 706/862 heads. Description: 99-06 Chevy LS 5. Are 862 Heads a Better Choice? Why Chevy 706 Heads LS Make a Great Choice? 13-Step Process for Remanufacturing GM's castings (and other manufacturers for that matter) can have production variances that can cause specs to be off. 1:1 on the 61. 3L LS series engines. Yes, the “Are 862 heads any good?” question doesn’t need to be emphasized since the cylinder head is the best for engine compression, but you need to weigh the bad and good of porting to 862 charges. Wilkes Performance LS/LT1 Series Heads. Just curious how much any of you have milled your heads and did you have any intake sealing issues? I'm trying to decide if it's really worth milling for compression, I already have to notch the pistons for the cam I'm running and have to buy pushrods so if I'm going to do it now is the time. CYLINDER HEADS INTERNATIONAL 800-942-4503. Aspect 799 Heads The pricing and availability of 799 vs 862 heads may vary, making it essential to compare and research before We find out which factory LS head works best under boost in this back-to-back test of the 706 heads vs. 3, the 862 heads will do a decent job. In addition, there’s some controversy among gearheads about whether the “swirl” ramp added to the 243 to improve fuel and air mix in the combustion chamber actually works. Save: $62. Description: For Gen 3-4 LS cylinder heads only Item #: /S-CUSTOMLASER-CYLHD. 660" Spring Kit and Titanium Retainers $ 1,899. 5cc chambers. 0L CAM TO USE? STOCK 6. 8L-5. Runs perfectly, 72000mi, absolutely no smoke, clean oil. Precision Race Components Aftermarket LS3 As-Cast Cylinder Heads $ 2,203. I'm at 9. I vote for porting the 706 heads and using them with the stock size valves and save the extra coin for a cam upgrade. 852 862: Cathedral: 4. 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. I'm not sure were to look on the motor to know this for sure it has 862 heads which all the info I could find was that they came on the 99-00 5. Both had stop leak, and heads reused. 051 gasket would help me stay withing a reasonable compression to be able to run 91 more comfortably then that alone would be worth it imo. 57 oversized exhaust valves are available! PM for details! JPI Cylinder Heads. 0 is a well worn subject for the bump in compression, but I do see some people decrying the lackluster flow compared to 243/799s. not big differences but will still lose almost half a point of compression when swapped over. 3L Cylinder Head 706 Assembly w/ Rocker Arms -This is a Rebuilt OE Stock LS 4. Factory has the 862 heads. $1,300. Engine heads are a vital part of a car and play a crucial role in determining the engine’s See more While the 862 head offers a larger combustion chamber and intake port, making it suitable for high horsepower and naturally aspirated engines, the 706 head’s smaller When comparing the 862 and 706 heads, their casting numbers and variations point to the 706 heads as slightly better mainly due to their SPM manufacturing process. 0 aluminum center bolt heads . To verify that Castech heads are installed and cracked: Remove the valve cover and valve rockers. 3/LS1 (706/862/241/853) (PRC-5. i believe there is something to be said for actual valve pressure and swirl, its not just a bench flow thing. 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. Save Share OK, so I'm right now testing out the very truck with the two different heads 862 on P and 706 on D side. The store will not work correctly when cookies are disabled. Save up to 10% when you buy more. 1938 posts · Joined 2009 Add to quote; Only show this user #1 · Dec 4, 2013. 14 shipping. (except 241's and 853's) I was curious about the differences. Moderator: Team. This head is completely rebuilt. 3 heads will have a casting number of 862 or 706. 8L REBUILT CYLINDER HEAD 706 & 862 CASTING ONLY. Even more Wouldn’t we need the pressures the heads were flowed at to get those numbers? If we assume 25” of water and take the . Save: 11%. The 243 heads come with 64. 799 05 and up 4. 00/1. 5. 3L Cylinder Head Assembly. 3Truck heads ***reportedly came on a few corvette's too*** These are basically 243 Heads. Comparing the power and performance of 799 and 862 heads. Turbo Junkyard 4. In this case, the 706 did a better job. 8-5. 317 Modified (Turbo) 5. so i think it will ( 402 rwhp) is when i had ported 706 5. I flow a stock 706, 862, and 317 LS Head and share the numbers. 9" valve isnt tiny compared to 2. the 317 heads 706 vs. 3 in a savannah van and I was wondering what heads were better with a small cam and 75 hp shot of nitrous Reply GM Chevy Truck Cylinder Heads. 13 watchers. 8- and 5. The LS heads meant for bolting up LS engines were lightweight, 799 Heads & Its Application. Home & Kitchen Cast #: 706, 862. Description : Stock LS Series 4. About Us; Promotions; Videos; We CNC I'm under the assumption the ls4 would be yellow springs. It has been pressure checked for cracks and resurfaced. 3L Cylinder Head 706 Assembly w/Rocker Arms LS LR4 LM7 LM4 862 (Renewed): Cylinder Heads - Amazon. $10. 0, which is a little off from what GM advertises. now I'm considering just haveing the 853s done any thought and feedback is appreciated. 0L? HOW WELL TO PO But really neither set of heads are great. He breaks down some of the major differences betw Swapping in 243 heads will increase flow a little, but unless you mill them first, you'll lose compression. Find top brands, exclusive offers, and unbeatable prices on eBay. There's no debate, it's been proven the 862/706 heads will make more power than the 317's. They kept delaying sending me out another set and they said they had one but were waiting on the second. When testing these two types: 799 vs. com FREE DELIVERY possible on eligible purchases. Toolbox for truck. Shop now for fast shipping and easy returns! Skip to main GM LS 706 806 862 241 799 862 243 CYLINDER HEAD REBUILD SERVICE 3 BUISNESS DAY. Katech Competition Assemble LS Cylinder Heads - Build GM 4. That said we use much of this internally as we're applying our LS head porting profiles to customer heads and we'll update it accordingly as you give us feedback or we discover new oddities. CNC Ported GM 243 / 799 Casting So I have a friend who's got a 5. Are they exactly the same only difference is in casting? I’ve seen online that they are but also 862 has higher compression. So far i know they will raise my compression, from some reading it will be good low end tq but not quiet up top. 3 LS Full #706-862 quantity. 0L LQ4 bottom end with some 862 5. Quick View. 873 99-00 LQ4 6. the 317 heads. Precision Race Components 2014 5. 17 posts 1; 2; Next; KnightEngines Guru CGT wrote: ↑ Mon Oct 14, 2019 1:18 pm I think the 706 and 862 castings have a lot of potential within the OE cathedral castings, yet they get passed over frequently in favor of 243 and 799. ASIN : B0BMJBCV5V : Working with the intake and camshaft, the cylinder heads are part of the trio of performance components that dictate the power output of the engine. Qty: Gen 3/4 LS|LS Cylinder Head Services|GM; Shipping Information. Tools & Home Improvement. ), it is difficult to improve upon the power [] 862 99 and up 4. 3 Truck heads 799 05 and up 4. GM 5. Was a gubment GSA truck so I'd imagine the head swap was done by a GM shop. dehumidifier. 2 Also willing to buy a good g4 4” stroker crank 0821 heads 1000$ no springs 823 heads 800$ 1x862 head stock 100$ 2x 862 heads 250$ 2x 706 heads 280$ Still have accessories 80 for ac compressor 80 for alternator 60 for power steering pump 30 for This month, we've teamed up with Gabe Darveau, of Vengeance Racing, to go behind the scenes of a cylinder head porting job. Part Number: LS706NB Category: GM. 0. 00"/1. The 706 heads will certainly bolt onto the larger 6. CNC Porting Service Was: $561. 55" Valves In Stock (0) Reviews: Write first review. 706 Heads and Their Features. [Hodges Engines & Performance]- Full automotive and diesel machine shop! Coweta, OK. James Harris of Class A Performance comes back with another installment of the LS Series on Muscle Monday. In this episode, I give my reasons wh The 862 heads’ 61-62 cc combustion chambers are among the smallest in the LS series, which increases the compression ratio when paired with standard LS short blocks like the 5. Made noticibly better torque but with a corresponding bit less top end. 3l and 4. 0 We test 11 different Chevrolet LS cylinder heads to see which one flows the most and produces the most hp and torque. New (Other) C $1,009. 3 litre heads and then enlarging the intake valves to 2". which heads should I get professionally hand ported 862 or 853. Mine has an 862 and a 706. 55" Valves. Hobbies › Car Engines & Parts. 706 99 and up 4. Got lucky at a local junkyard and snagged a set of 862 heads off a wrecked z71 2000-2006 body style. 3 heads for Also Read: 4. By manyponies in forum Internal Engine Replies: 4 Last Post: 10-12-2009, 09:15 PM. Am I correct in assuming these fit my motor? I thought they were basically the same as the 706's that are original on my motor. 5 4. Like the 317s, the 241 heads out-flowed the 706 706 LS heads - how'd I do? General engine tech -- Drag Racing to Circle Track. Add to Cart. Our 706 Chevy heads are crafted from high-quality aluminum, offering durability and lightweight performance. 8 Silverado with stock 706 heads. 55” exhaust, respectively. Buy It Now. ” Cause I don’t. These heads are almost the same, but the L99 heads used a solid stem intake valve. 3L truck heads L92 heads (often referred to as LS3 heads) moved to a rectangular port and are some of the best LS heads ever made, Generation III Internal Engine - Any dyno comparison info on 4. Location is approximate. 862 LS Heads make the top choice when it comes to high-performing The Chevy 706 LS Heads are superior to the most popular 862 heads, sand cast, and produced using semi-permanent molds (SPM). $50. Youth Catcher’s Glove. 0 block and some 862 heads for a decent price. 3 LS Bare #706-862 quantity. Message. LS1 LS3 11 Degree LS7 LSA 243 799 862 706 317 CNC ported Shaft Rocker Arms. I’ll be listing a set of 862’s next weekend. 8L, Cheap EBay GT45 turbo, stock 706 vs TFS 205 CNC Heads test. Fast forward 2 years and now it seems at least one of the 862 heads has cracked. We find out which factory LS head works best under boost in this back-to-back test of the 706 heads vs. 3 OHV LS4 SILVERADO TAHOE CYLINDER HEADS CAST#706 &862 99-05 . 5 LS1 LS3 11 Degree LS7 LSA 243 799 862 706 317 CNC ported Shaft Rocker Arms. 3 were dished. 9:1 now and going to run E85. We discuss the performance, flow rates, and compatibility differences with different engine build. 2 VORTEC | eBay A . 2 chamber size of the 706 head. Simple: 408 on steroids! single digits coming soon! Reply With Quote. It succumbed to the Castech cracking issue a while back. Whether you need 706 ls heads or 5. 7 6. Have a few sets of 706 862 Ls heads $100 a pair Will not ship The LS guys 6902 Ne 23rd Oklahoma City Oklahoma City, OK. R&R heads and gaskets, but still rebuilt the heads and used on another motor. Upgrade your GM Chevy Truck with high-performance Aluminum LS4 OHV Cylinder Heads designed for the Silverado, Avalanche, Tahoe, Trailblazer, and Express. 3L. 3L New valve stem seals installed on all our heads & all valve guides are replaced with new ones as Inasmuch as porting to 799 heads comes with an advantage of increased horsepower due to increased compression, you must ensure to consider both the pros and cons before swapping the cylinder heads. 8L 5. They also share common traits, making either head a decent choice With its smaller combustion chamber, 862 head gives better performance promise. CNC Ported GM Much like the 4. I think one set might be 862 but I can’t be sure. . Guides and seats have been replaced as needed. $375 $500. 706/852/862 '99-up 4. 3l trucks and so on. Sale: $499. The heads flow like a LS1, but have the smaller chamber. The LS 454 uses a set of canted valve cylinder heads with two spark plugs per cylinder. 3 days ago. Talking about chevy engines, we have three options – 317, 706, and 862 heads. Reply. 71 chevy Discussion starter. 862 heads have a combustion chamber volume of approximately 64cc, while the 706 heads have a slightly larger combustion chamber volume of While 862 heads are sand cast, 706 heads are semi-permanent mold. We test a number of stock LS heads and came out with some very surprising horsepower numbers that will turn the internet 706 vs. For just a basic bolt-on 5. 3 engines are versatile and reliable. Throwing some 862/706 heads on a 6. $80 $100. PROJECT X SERIES LS XXTREME SERIES SHOCKER SERIES MAXX SERIES SERIES Fits 1997-2013 Cathedral Port LS Heads. SKU: KAT-M7107. in Roseville, MI. 3LThough LS enthusiasts seem to think I have one 706 head that has been rebuilt and one 862 head that has been rebuilt. ive pulled the stock 317 heads off, throwing the 862 heads on. I now know I would like the tbss intake The 706 heads are the same as the 862 heads. I’ve been offered a 5. Jump to Latest 56K views 39 replies 8 participants last post by 71 chevy Dec 11, 2013. Increase quantity for 706/862 LS Porting Service (Pair) Add to cart This item is a recurring or deferred purchase. 8L . 8/5. 7 heads can have 806 (97-98 perimeter bolt), 241 or 853 (99-up LS1 heads), and 243 (LS6/LS2 heads). Cast #: 706, 862. Remanufactured. We used a Holley XP 750 carburetor to supply fuel to the 6-liter LS. Last edited by jrbonds; 07-01-2013 at 07:54 AM Posts 4,975 2000 Grand Prix GTP 2000 Trans Am WS6 M6. basically gen3 ls blocks. Do ported heads add power? Can you just run more FULL BOOSTED DYNO RESULTS. Vehicles 706/ 862 LS base heads pairs. Morning yall, 5. 3L combinations, the 706 is one of the most common LS heads available. 3L? SHOULD I SWAP TO 317 HEADS ON MY 4. 19. Are 706 heads better than 862 heads? The 706Vortec heads are even slightly superior to the commonly found 862 heads. You can check out a detailed comparison of the 862 heads vs 706 . These cylinder heads feature interchangeable casting numbers 706 and 862, ensuring a perfect fit for your engine. I now know I would like the tbss intake manifold, but based on what I’ve been reading the 706’s and 243’s are pretty similar. 3L & 6. 706 heads were per the year of the truck, and some what engine they are off of. r s p o d e n S t o 9 r 7 a 1 3 t 9 3 f c h 1 e f c M f 4 4 5 9 a 3 e c u n m r u 6 f Our 706 &amp; 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. NEW GM CHEVY 4. 3l heads upgraded to 2. 3 Truck heads. 3L test motor. or Best Offer +C $110. The 317 heads are equipped with superior ports but a lesser horsepower. 317's and 241's are the worst factor LS heads. 3L LS REMANUFACTURED Cylinder Head 862 Assembly w/Rocker Arms 706: Cylinder Heads - Amazon. Have the stock steel 706 heads and heard they are pretty solid for a stock casting, weighing if I NEED work done to them so they aren’t my limiting factor. In the case of the LS3 and (especially) LS7, the factory heads offer exceptional air­flow. Dec 26, 2017 | 07: 54 AM Share #5 JoeNova. 3. But with the all the non 706 LS motors Iv worked on or owned, I can count on one hand how many had head gasket issues. That’s because no single component on an engine affects power output more than the cylinder The head casting numbers are typically 706 or 862. com, the official website for Hot Rod Magazine. Although the 243 heads appear to be more excellent than the 706 heads, it may not be a nice combo with a tiny bore engine due to its larger intake valve. We test a number of stock LS heads and came out with some very surprising horsepower numbers that will turn the Internet 706 vs. If you ruin a port, practice on the other ports and then throw it away or cut it in half. 025. or Best Offer. If you’re contemplating 862 heads Vs. Features; Performance Cylinder Heads. 0L. Used extensively on both 4. I am putting a summit pro kit which bores it out to 5. DIESEL. Two intake manifolds were used; the Edelbrock Performer RPM LS3 is shown and was used on the rectangle-port EQ heads, while an Small Block Chevy LS Cylinder Heads by Casting Number 10215339 – LS Small Block V8 1997 346, LS1, aluminum, 68cc chambers . The factory chamber on a 5. any other help from the tech gu 706 heads If this is your first visit, be sure to check out the FAQ by clicking the link above. Diesel. Free shipping. 3 has 862 heads and I found a set of 799 heads on a 5. 2L, but they'd be great on any 6. 3 Truck heads . 3L V8 engine, enhancing power and efficiency. I’d actually have to look. We’re going to do a deep dive into what makes each one 862 Heads: Cast Iron or Aluminum: Cathedral: Varies: 2 valves per cylinder: Small-Block and LS Engines: Moderate potential with mild modifications: 243 Heads: Aluminum: In a nutshell, the 706 heads have become a go-to choice for Look to be the same heads, just updated part numbers. Wilkes Performance 273cc 11deg LS3 6 bolt Casting. 706 Vs. A major difference between the two is their combustion chamber volume. Shop by GM LS 706 806 862 241 799 862 243 CYLINDER HEAD REBUILD SERVICE 3 BUISNESS DAY. 15 tighter then most LS heads. 00. Create new listing. 8:1 and large valve heads? Curious if the 799 is an ?all around? upgrade or if you lose low end power compared to the CAN YOU MAKE MORE THAN 500 HP NA WITH STOCK 706 HEADS? DO 799 HEADS MAKE MORE HP THAN 706 HEADS? WHAT MAKES MORE HP, REC PORT OR CATH PORT HEADS? The 862/706 heads have smaller combustion chambers than the Gen IV, raising the compression ratio when swapped directly. Buy GM 4. Choose Quantity for a Single Valve or Set of 8 Exhaust Valves. You’ll lower the compression ratio if you go to some other heads. The 706 heads are a popular choice for 5. Knowing they were near identical except for casting method, I had them send just the one. Hello 862 casting also replaces 706 * Description : Stock LS Series 4. Ramona, OK. CHEVY SILVERADO 4. Many automobile components are out in the market, so much so that you might need clarification about choosing the right cylinder headfor your car. Claremore, OK. LS LS1 LS2 LS3 LS6 LS7 LSX 862 CYLINDER HEADS SET 4. Listed 2 weeks ago. You may have to register before you can post: click the register link above to proceed. I have a mild cam 218/227 long tubes and a lid plan on doing heads and a LS6 intake. 823 vs 243 heads The popular L6 243 heads have a smaller capacity (64cc), whereas the 823’s larger intake valve has a 70cc cylinder, promoting better overall flow within the combustion chamber. 8l had flat top and 5. Cummins GM Durramax Powerstroke. 55" exhaust valve, 70cc exhaust The 862 casting with bigger valves and good port work is one of the best early LS cathedral port heads. 8lwhere the 4. But, it is something about which many people are not adequately informed. Holdener did some of these head shoot outs and the 706/862 won out actually. 3 LS budget builds using stock heads. 6 bolt main caps vs 4, the main caps bolt through the skirted block, This is a complete remanufactured PAIR, 1996 - 2007 GM Chevy LS #862, 4. 5:1 Intake Port Volume: 200cc Exhaust Port Volume: 70cc Intake Valve Diameter: 1. Are 706 and 862 heads the same? 862 vs 706 heads. Gabe's been doing this type of work on LS cylinder heads for years and Refurbished 862 LS heads -Fresh cut valve job -Surfaced -New Valve stem seals -Comes with stock springs -Check out our price Contact for prices on other available heads. Most of the other LS cylinder heads have larger combustion chambers. on both 5. 7. If you’re looking to build a powerful LS engine on a budget, the 862s from Cathedral Port are definitely stock 862 heads vs stock 243. 3L Cylinder Heads 706 Assembly w/Rocker Arms SET OF 2 LS LR4 LM7 LM4 862 (Renewed): Cylinder Heads - Amazon. Joined: Mar 2014 Cant use ls9 gaskets on 706/806/862/853 heads that have notch on the deck or any other mls gasket save for pricey Felpro mls or 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. I know 243's are good but didn't know if 862's are any good when they're right in front of me This article compares 799 Vs 862 heads commonly found on LS engines. Unlike cathedral-port heads (706, 317, 243, etc. 2 were pull outs that got hit so hard the gasket broke. 8 with 799 vs 706/862 heads? - Which combo do you think would make more low end power (say below 4k)? 9. For instance, if you’re looking While both sets of GM LS cylinder heads will have their own benefits and drawbacks, they are both incredibly powerful heads to put on your GM power plant. 862 heads are common for LS engine builds because they are widely available and relatively CMIIW: I've been told there is no major difference between the 706 and 862 heads once you work them over. All OE LS cylinder heads feature a cylinder bolt layout that provides four bolts per cylinder. No 243s or 799 have the casting defect that I've heard, it was pretty isolated to the castech only 706's on gen III 4. 89” intake valves and 1. Ks1UV. Just wanna know if I'll benifit from them at all from stock ls1 heads. 3L heads, ive been doing some reading but still need some help, wheater or not i will benefit from the switch. Buy GM REMANUFACTURED 4. See all. Casting Number 706 and 862 Head: 1999+ 4. That Castech heads are the ones that are known to be the problematic heads prone to cracking. 8 vs 5. 3 that's going in my 02 silverado that currently has a 4. hey guys, i have a brand new set of valves out of ls2 heads, and i was wondering if i could easily get the 706/5. Just add our valve spring kit and bolt on more horsepower! The store will not work correctly in the case when Bare Cylinder Heads With Valves; Bare Cylinder Heads With Valves. 3 block with 243 heads on it for $300. 3 truck heads (casting #862 and 706) are also a very popular base casting for porting/modifying, We saw a bunch of LS based engines with all of the above casting #'s. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Skip to main content. 8 and the 5. All other heads feature as-cast, rough finished chambers and ports. So I'd be okay having the 862's ported/polished/rebuilt rather than my current While the 862 heads are a good upgrade over the stock 706 heads, they’re not always better than aftermarket alternatives. Known for their affordability and power; Exceptional flow characteristics; Superior to 862 heads in reliability and performance; These heads have a cathedral-port design offering better flow compared to other stock LS Explore a wide range of our 706 Ls Heads selection. 0 Iron center bolt heads . Although the SPM approach is more reliable, porting 862 heads eliminates their distinction. Thanks LS gurus. com. 3 Liter Truck Material: Aluminimum Part Number: 12559862 12561706 Combustion Chamber Volume: 61. Some guys will use 5. 60 PSI LS1511ML . Locate the Castech mark under the valve rockers. 0 and had an ms3 cam and 862 heads ported, milled, and valve job and went 12. 61cc. PRC LS3 Aftermarket 6-Bolt 260cc CNC Cylinder Heads $ 2,709. Torpedo Heater. PveCI7AGUfJJpQis5iNJw0eM6ibQ. On the other hand, 706 and 862 heads are almost identical. Stage 2. Erie, KS. started getting used in the higher performance engines like the l33 and then later put on the gen 4 5. $250. Fits Casting Numbers 243 799 706 862 317 241 853 806. 89 inches Previously, we compared the stock 706/862 heads to the 799/243 heads on a cammed 5. Photos from JPI Cylinder Heads's post. STOCK REPLACEMENT . Dearing, Kansas · Within 621 mi. Copan, OK. 3L Cylinder Heads Assemblies. Opens in a new window or tab. 0L UPGRADES! ARE THE 706/862 School of Automotive Machinists founder, Judson Massingill, lives by a simple adage: Get a head, flow a head, stay ahead. 2L CNC Porting Service Explore a wide range of our 862 Ls Heads selection. Came across an opportunity to grab a 6. Categories. More. from United States. I've read a dozen posts about cracked LS heads between the valve seats, specifically 317 casting heads. com FREE DELIVERY possible on eligible purchases GM 4. 3L LS REMANUFACTURED Cylinder Heads 862 Assemblies w/Rocker Arms SET OF 2 706 (Renewed): Cylinder Heads ‎706 862 : Special Features ‎Includes Rocker Arms : Additional Information. Listed 3 days ago. hotrod. 3L engine is a very common engine that people like to do cylinder heads and camshaft swaps with and one of the most commonly asked questions we The 706/862 cylinder heads come with a 1. This LS head shoot out between the s well we will have to see. Only at www. 3 Truck heads 706 99 and up 4. 3L OR 6. but guessing i will gain about 30hp from the extra point of compression, so expecting to see about a 20hp net gain. 02 The 5. Chevy 706 LS Heads are high-performing cylinder heads that offer enormous power at an incredible price. 16 The 706 & 862 heads have a 61cc combustion chamber. 243, 706, 799, 862, 821, 823, 5364. If installed on any other OE LS block it would result in valves contacting the bores. 3 Reliability. 706/862 LS CNC Ported Heads, Speed Works has teamed up with Wilkes Performance to bring you the most powerful heads available. The 5. I’m listing it early to see if there’s any interest and if you want a specific chamber size. I don’t guess it really made a lot of sense to me while watching it lol the 862 and 706 are very similar so that didn’t compare the 243 to the 862 like I would like to find out . 0. I am not very supportive of semi-novice hand head porting of almost any cylinder head especially the LS series heads in that in today's performance parts and shops world the availability of some well designed and performing CNC head programs The 862 heads are also compatible with various LS engines, providing versatility for different vehicles. the 317s flow 240 and the 862s flow 227, so maybe a loss of 10 hp, by my calculations. 8 5. So, I am not sure if that would work and if I should get another 706 or 862 head to make the heads match but I'm trying to do budget build. 3 heads to up their compression. If anything, you want to raise compression. 12-08-2009 10:21 AM #10. But if you're going to put any money into them just spend it on 243's and go. I don't know the gains but I had a TA a few years ago that was a super budget setup that consisted of a 6. 706 heads on the 5. 5-61. 02 mill sounds good to me (if I'm not mistaken that would bring me to around 62cc) and if the . The reason is that the 706 heads are SPM He put 862 heads on his LS1 to "bump" up his compression. top of page. The LSX454R block also comes with forged Mahle pistons, forged titanium rods with Katech CNC Porting LS1/Truck 862, 706 Cylinder Heads (PAIR) In Stock (0) Reviews: Write first review. SERVICES. 3's. i mean a 1. 15cc Compression Ratio: 9. Get the best deals for ls 862 heads at eBay. Stock Deck Thickness; LS1: 12564824: 241 706. 06cc. 0L? WHAT IS THE BEST STOCK 6. Also, heads with casting number 862, 706, 806, 853, and 241 are nearly worthless in the LS world. This high compression contributes to stronger low-end torque and snappier throttle response, making 862 heads ideal for applications focused on towing, hauling, or daily driving. 317 01 and up LQ4 and LQ9 6. 625 Milled. On my last post I asked if the LS6 heads and intake would fit on my 2003 4. These heads have been meticulously crafted to exceed OEM specifications, ensuring top-notch quality and reliability. 5:1 and small valve heads? Or 8. There was much uproar among 799/243 head enthusiasts. 035 01 - 04 LQ9 6. The 862 heads are inferior to the 706 heads in terms of compression, and they don’t also flow well like the 243 heads because it doesn’t These heads can be CNC-ported to improve on flow and milled for higher compression. the blue line is from a head and cam swap . 00'' valves i know i'll have to do some work in the chambers, but i don't really care to forego the expense of a whole new set of heads. tklu rlumiioj edxgrxv gcr qxfeo yof tahp kmws dnrk ixg