From how I understand it to work...and I'm no expert... 317 heads are designed for a 4.000" bore motor. Your LS1 is a 3.900" bore motor. Therefore, you'll need a thicker gasket on your heads. Stock heads are 67cc and you are going to a 72cc. This is going to drop your stock 10.5:1 compression down some.This handy LS resource page is a good one to bookmark if you're considering an LS crate engine for a swap, or looking for a 6.2L (about 378 cubic inches) LS short block to start a project. Learn more about each LS engine displacement: * 4.8L LS Engine Guide: Block Specs, Swap Resources & Build Info. * 5.3L LS Engine Guide: Block Specs, Swap ...L84 5.3L EcoTec3 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More - OnAllCylinders says: July 25, 2019 at 4:28 pm This is an engine specification guide for General Motors' fifth-generation L84 engine that launched in 2018 for use in the Chevrolet Silverado 1500 and GMC Sierra 1500.LSXceleration Stainless Steel 8mm x 1.550 LS Exhaust Valve 15-21550-1 Stainless Steel LS Valves 1.550" Head x 8mm Stem x 4.915" OAL x 0.160" Tip Features: Hardened Stem Tip Chrome Plated Stem Fully Machined Surface Swirl Polished Undercut... 15-21550-1 $12.00 Add to Cart Compare. Add to Cart Compare. LSXceleration Stainless Steel 8mm x 1.600 LS ...Windows/Mac/Linux: Mozilla today released the first beta build of Firefox 4, complete with a new look, new features, and support for more HTML5 specs. Here's a quick screenshot tou...This system prevented oil starvation during acceleration/cornering and featured an 8-quart remote reservoir. The LS7 was perhaps best known for the phenomenal amount of power that it produced. The highly refined small-block conjured up 505 brake horsepower at 6,200rpm, and 475 lb./ft. of torque at 4,800 RPM. The LS7 equipped Z06 posted 0-60 MPH ...741 posts · Joined 2004. #11 · Jul 12, 2022. If you want to make power with a 5.3, you need compression or boost. The 799/243 head is great for flow, but given that your engine originally came with 706 heads, it likely has dished pistons. The 799/243 will kill what little compression you have now unless you mill them.The L86 is a Gen. 5, 6.2L, small-block engine powering 2014-present GM trucks and SUVs. They are known as the EcoTec3 6.2L engines. These engines use a longer intake runner than its cousin, the LT1.This helped the L86 produce peak torque 500 rpm sooner than the car version of the 6.2L engine.The GM LM7 (Vortec 5300) features V8 90° cast-iron cylinder block with a five-bearings crankshaft, two aluminum heads, a single one-piece cast camshaft and two valves per cylinder (16 in total). The LM7 has a sequential multi-port fuel injection system and 78.0 mm (3.07 in) throttle body. The engine used a "Coil-Near-Plugs" ignition system.The 799 head flow supersedes that of 706 heads with as much as about 20 cfm at specific lift points. The cylinder heads’ intake port and exhaust port shapes are cathedral and D-port, respectively. The cylinder heads come with a smaller combustion chamber, which in turn engenders increased compression and improved horsepower.Key Specifications. The tractor is powered by various International Harvester engines, including a 4.6L 6-cylinder diesel and a 4.3L 6-cylinder gasoline engine. It offers 8-speed and 16-speed transmission types and has a weight range of 7530 to 9160 pounds.After installation of the 706 heads, the power jumped to 468 hp at 6,800 rpm and 413 lb-ft of torque at 5,300 rpm. The 706 heads consistently improved the power …Save yourself the time and expense of going to an aftermarket camshaft supplier and build your LS engine with a genuine GM cam. We've also got the valvetrain components you need to finish the engine, including lightweight components designed for high-rpm performance. LS1 / LS9 Cam. Duration @ .050" Lift ( Deg): Intake: 193 / Exhaust: 201.The 799 heads are also great for those looking to increase the total valve lift on their LS engine. 706 heads. The 706 heads are great for optimizing their LS engine for performance. The 706 heads feature high-flowing cathedral intake ports intended for higher-performance applications. They have a larger valve spring package supporting higher ...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 ...Everybody loves free things. And they're easier to find than you'd think! Here's a list of the top 50 free items you can get this year. What’s that you say? You like free things? W...WHICH STOCK LS HEAD MAKES THE MOST POWER? SHOULD I UPGRADE MY STOCK 6.0L HEADS? DO CATHEDRAL-PORT HEADS MAKE MORE TORQUE THAN A REC-PORT HEADS? WHAT ABOUT TH...Dec 22, 2017 · 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 ...Feb 10, 2023 · To help make power, the SP 5.3L also featured a set of ported 706 heads. Katech provided the porting for the 706 heads, though the porting program retained the factory valve sizes. Given our sizable cam choice, the Katech 706 heads were also treated to a dual valve spring package from Brian Tooley Racing , stock rockers, and hardened Trend ...243/799 LS CNC Ported Heads. Speed Works has teamed up with Wilkes Performance to bring you the most powerful heads available. 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.This is a Rebuilt OE Stock LS 4.8L , 5.3L Cylinder Head Assembly. Part # : 706 , 862 also fits. Description : Stock LS Series 4.8L / 5.3L Cylinder Head. Compatible with LR4 / LM7 / LM4 Engines. Specs : Combustion Chamber Volume: 61.15cc Intake Port Volume: 200cc Exhaust Port Volume: 70cc Intake Valve Diameter: 1.89 inches Exhaust …GM 706/862 5.3-Liter LS1, 218 cc. GM 243 (LS6) and 799 (LS2), 218 cc. ... New "862" or "706" casting cores are CNC-ported and machined to specifications dictated by extensive research and testing. Each set of heads is milled and assembled to the owner's specifications and utilizes stainless-steel valves. ... In addition to its regular ...The Gen III engines were the firstborn from the original LS1 in 1997 through 2002. These engines used a 24x crankshaft trigger wheel and a cam sensor mounted at the rear of the camshaft. Roughly in 2003, GM upgraded the LS into its Gen IV configuration with a number of changes. The upgrades included a 58x crank trigger wheel with the cam sensor ...Sep 28, 2015 · Despite numerous differences the Gen III LS Engine and Gen IV LS Engine cylinder blocks share a lot of the same traits. 4.400 Bore Spacing (same as the original SBC) Deep Skirt Block with Six Bolt Cross Bolted Main Bearing Caps (reminiscent of the old Ford side oilers, FE, and some early hemi blocks) Center Main Thrust Bearing. 9.240 Deck Height.The 799 heads are also great for those looking to increase the total valve lift on their LS engine. 706 heads. The 706 heads are great for optimizing their LS engine for performance. The 706 heads feature high-flowing cathedral intake ports intended for higher-performance applications. They have a larger valve spring package supporting higher ...The stock LS1/LS6 series engines have rocker arm ratios ranging from 1.7:1 up to 2.5:1 depending on their application and camshaft profile, with an ideal range being between 1.8:1 and 2.2:1 for most common street applications. ... The 2009 5.3 rocker arm torque specs for the cylinder head bolts are 18 lb-ft and then an additional 90 degrees of ...317 Heads Specifications. 317 6.0L Truck Castings; Valve Size: Intake - 2.00, Exhaust - 1.55; ... However, the stock 5.3L 706 heads outperformed the 6.0L 317s. What LS engines had 243 heads? The 243 heads were utilized in the LS6 engines manufactured between 2001 and 2006. These heads are known for their exceptional power and efficiency.Do the match on that 4.8L motor and it equals 1.46 hp/ci. The big difference between a set of 5.3L (852 or 706) heads and 5.7L LS1 (853) heads is the chamber size and the intake-valve diameter. The 5.3L truck heads use a 1.89-inch intake valve, while the 5.7L heads found on car engines enjoy a 2.00-inch intake valve.I picked up a newer 5.3 the other day with 706 heads. I'm planning on using a Tr220 cam. What would be a good amount to mill the heads to? ... for the change in length by subtracting the the new head gasket compressed thickness and amount shaved from the head from the original equipment specs or use a pushrod length checking tool. when being ...CNC Ported LS 5.3L 706 / 862 Cylinder Heads, Customer Supplied Bare Casting. $599.95. Buy in monthly payments with Affirm on orders over $50. Learn more. Options. Resurface for MLS Gaskets + $150.00. Valve Job with new Valve Guides + $400.00. Cylinder head Assembly + $150.00. Add to Cart.706 Heads on a 06 5.3. Jump to Latest Follow. 16K views 9 replies 6 participants last post by LiftedLQ9 Nov 12, 2008. B. Biggsw784 Discussion starter. 246 posts · Joined 2006. #1 · Nov 10, 2008. I am pulling the heads off my 5.3 to replace the lifters due to one of them collipsing. While I have these heads off, I was going to get them milled ...Learn what a 706 credit score means. See if 706 is a good credit score, what loans you can get & more. Everything you need to know about a 706 credit score. Find out if 706 is a go...The LQ4 is a 6.0L LS (Gen. 3) small block engine used in GM trucks between 1999 and 2007. For marketing purposes, it was also known as the Vortec 6000. The engine specs and information listed here is for the stock LQ4 engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM …The MTX Blue Thunder 10 is a car-audio subwoofer. The subwoofer prevents distortion without reducing power. The Blue Thunder subwoofer is small in size and has a sleek design, but ...Jul 10, 2022 · 741 posts · Joined 2004. #11 · Jul 12, 2022. If you want to make power with a 5.3, you need compression or boost. The 799/243 head is great for flow, but given that your engine originally came with 706 heads, it likely has dished pistons. The 799/243 will kill what little compression you have now unless you mill them.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 LM4 is a 5.3L, Gen. 3 small block engine used in GM trucks between 2003 and 2005. It’s is very similar to the LM7, except that it’s built on an aluminum block, and the LM7 is an iron-block engine. For marketing purposes, the LM4—like the LM7—was also known as the Vortec 5300.706 Heads. Not surprisingly, the 706 truck heads offered both the smallest port and chamber volumes. The combustion chambers on the 706 heads measured 61.5 cc, while the intake and exhaust port...The LMG engine is a 5.3L Gen. IV iron-block engine used in GM trucks and SUVs between 2007 and 2014. For marketing purposes, it was also known as the Vortec 5300. The information listed here is for a stock LMG engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM …Oct 4, 2018 · 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’ LS and LS-based ...Surprising HP Numbers From Our Stock LS Cylinder Head Test I have ported 2 sets of LS heads so far and one was the 706. I did not flow it though but I was impressed at the shapes of the LS runners. I also did some LQ9 heads for a buddy and noticed an area that looked like reversion was happening where the air comes towards the rocker stud boss.706 head casting numbers 706 head casting numbers. By MinnesotaFarmall August 10, 2013 in IH Engines. Start new topic; Recommended Posts. ... As I read more into the head specifications it gets a little more interesting. The later D-282 and D-236 engines, TD9 BM, BBPM, BGAM, L-150 GM PM serial numbers 6082-8277: TD 62M 2216-2675: UD 236M 2874 ...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, but the L99 heads used a ...Incidentally, 799 heads are essentially identical to 243 heads, but the 243 casting has a smoother finish. 823 vs 706 heads. Similar to the 799s, the 706 will deliver better performance up to around 4000rpm. However, for racers willing to spend a little more money, the 823 LS3 cylinder heads are fantastic all-rounders. The Final VerdictMorning yall, 5.3 LM7 aiming for 450-500HP. 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. I am putting a summit pro kit which bores it out to 5.4 with -2CC pistons which should be about 11.1:1 on the 61.2 chamber size of the 706 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.Each CNC ported cylinder head will have the exact same port and chamber configuration as the original master used to develop the CNC program. ACCOUNT CONTACT MY CART. EVENTS ; Gift Cards & e-Gift Certificates ; Lingenfelter ... Lingenfelter GT11 LS Series Camshaft 371/215 379 231 R118. $424.95. GM LS1 LS6 Head Gasket & Bolt Kit 1997 03 …243/799 LS CNC Ported Heads. Speed Works has teamed up with Wilkes Performance to bring you the most powerful heads available. 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 …The LS9 is a Gen. 4, 6.2L, aluminum small block engine used in GM cars between 2009 and 2013. The information listed here is for a stock LS9 engine. Mechanically similar, General Motors' LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, Buick—heck, even Saab, Hummer, and ...Great cylinder-head airflow has been a key enabler of the LS-Series’ exceptional performance. Chevrolet Performance delivers those power-building attributes to you with a range of production-style aluminum heads — from the LS6 heads for smaller-displacement engines to LS7 style heads for 427-inch-and-larger combinations, our aluminum heads benefit from Chevrolet Performance’s extensive ...Casting Number 706 Head: 1999+ LR4 4.8 Litre Truck 1999+ LM4 /LM7 5.3 Litre Truck Material: Aluminimum Part Number: 12559852 12561706 Combustion Chamber Volume: 61.15cc Compression Ratio: 9.5:1 Intake Port Volume: 200cc Exhaust Port Volume: 70cc Intake Valve Diameter: 1.89 inches Exhaust Valve Diameter: 1.55 inches 852 heads 61.15cc Chamber VolumeWHAT STOCK LS HEAD MAKES THE MOST POWER? WHICH CAM SHOULD I RUN IN MY 6.0L? WHAT IS THE BEST STOCK 6.0L CAM TO USE? STOCK 6.0L UPGRADES! ARE THE 706/862 HEAD...The combustion chamber diameters can play a big role in hindering flow and performance. The 706/862 combustion chamber diameter measures out at around 3.670" and the 243/799 combustion chamber messages out at around 3.880" and giving the fact that the LM7 5.3L engine bore is 3.780" this more than likely has something to do with the power loss ...This is a Rebuilt OE Stock LS 4.8L , 5.3L Cylinder Head Assembly. Part # : 706 , 862 also fits. Description : Stock LS Series 4.8L / 5.3L Cylinder Head. Compatible with LR4 / LM7 / LM4 Engines. Specs : Combustion Chamber Volume: 61.15cc Intake Port Volume: 200cc Exhaust Port Volume: 70cc Intake Valve Diameter: 1.89 inches Exhaust Valve Diameter ...The 5.7L LS6 is the most powerful Gen. 3 small block engine as it came from the factory. It is an improved version of the LS1 produced for the 2001 Z06 Corvette. The LS6 powered the 2001-04 Corvette Z06 and the 2004-05 Cadillac CTS-V. Mechanically similar, General Motors' LS and LS-based Vortec engines wound up on almost every branch of the ...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 ...You've seen what Boxee's beta media center software will look like. Now you can peek at pictures and specifications for D-Link's official Boxee Box, a small computer with HDMI outp...Speedmaster LS Head Studs - Speedmaster 3-Bolt Head Stud Kit 1997-03 Chevy LS - JEGS. Free Shipping over $199* Same Day Shipping before 10pm* Price Match Guarantee; ... Torque Specs with Motor Oil: 30lb 1st pass, 60lbs 2nd pass, 80lbs 3rd pass. 28lbs for exhaust ports. Torque Specs with Degrees:IIRC, only the very first LQ4s from the 2000s era had cast iron 317 heads. General consensus is the 706/862's flow well enough to support over 450hp NA. A good street cam and TBSS intake should get you close to 450, but you're going to …In addition to the lack of EGR provisions and steam-tube clearance, the LS6 intake differs from the LS1 in its plenum volume, runner shape, and volume. Jumping from .536 to .541 liters proved much more suitable for higher-revving applications such as the new LS6, and with the revised camshaft and cylinder head specs on the later LS1s.The 6.2-liter LS3 engine offers outstanding performance in factory form, with 430 horsepower available at 5,900 rpm and 424 lb-ft of torque present at 4,600 rpm. A long view of the Pro1 LS3; Dart has engineered these to use both stock valve dimensions and stock valvetrain components. They will also accept aftermarket replacements.LS 6.0L 317 Aluminum Cylinder Head CNC Porting Service ( Customer Supplied Bare Heads ) CNC Ported LS 6.0L LQ4 LQ9 317 Cylinder Heads, Customer Supplied Bare Casting. $599.95. Buy in monthly payments with Affirm on orders over $50. Learn more. Options. Valve Job with new Valve Guides + $400.00. Resurface for MLS Gaskets + $150.00.Timing Gear. The OEM cam gears vary in tooth count, bolt pattern, and sensor pickup. A - Single bolt 4X camshaft gear 2007-2014 LS2 or LS3 engine. GM PN 12591689. B - Three bolt 4X camshaft gear, 2006 LS2 Corvette or from a 2006-2009 LS7 Corvette engine. GM PN12586481.GM LS 706 806 862 241 799 862 243 CYLINDER HEAD REBUILD SERVICE 3 BUISNESS DAY. Opens in a new window or tab. Remanufactured. $459.99. Save up to 10% when you buy more. Buy It Now. teauran_0 (529) 100%. Free shipping. 7 watchers. Chevy 4.8 / 5.3 OHV Cylinder Head Pair 862 Silverado GMC Sierra Vortec 99-07.Dec 22, 2017 · 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 ...The 243 heads produce about 5% more power on flow alone. If you were to judge the 243 heads vs. the 241s on head flow alone, you'd get a slight power edge. This benefit occurs because of the hollow valve stem, delivering a better RPM potential that stands up to more supercharger or turbo applications.The 862 head is commonly utilized in high-performance cars, racing, and sports cars. It's also found in some luxury and sports cars. The 862 is a 12-valve design that utilizes two intake valves per cylinder and one exhaust valve per cylinder. The combustion chamber volume is 84cc for the 862S, 83cc for the 862C, 84cc for the 862F, 82cc for ...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 ...Understanding GM LS-Series Cylinder Heads. Before I get into the the meat of the book—the spec charts—there are a few things you need to know. They include information on converting from a cathedral port to a …The factory-built motor dished out about 430 horsepower right out of the gate, and the cylinder heads play no small role in that impressive output. The LS3 heads hit the flow bench. The LS3's 319-T5 aluminum alloy cylinder heads use 2.165 in (55.0 mm) intake valves, 1.59 in (40 mm) exhaust valves, and a 15 degree valve angle.Read about LS engines and LS engine family online at JEGS. where we go over some of our favorite GM LS engine specs and differences. ... LS Cylinder Head Casting Number Location: externally at the far right end of the head on the exhaust-port side. ... casting # ending in 706, 852, 862, and 895 – LM4/LM7/LR4 , with 1.89 / 1.55 …Trick Flow® GenX® 205 Cylinder Heads for GM LS 4.8L/5.3L/5.7L (Vortec) TFS-3051B001-C00. Cylinder Head, GenX® 205, Competition Ported, Bare, 58cc CNC Chambers, GM LS Vortec, Each. Part Number: TFS-3051B001-C00. Estimated Ship Date: Aug 14, 2024 if ordered today.November 18, 2022 by Sean Mendez. 862 Vs. 706 Heads: which is the best cylinder head for your car? Let’s find out! 862 heads and 706 heads are both cylinder heads that …LS COMBO DOME - compatible with LS1/2/6 style cathedral port heads & LS3 / L92 style rectangular port heads (Does not fit LS7 or 5.3L 706 & 862 Truck Heads) 1.0, 1.0, 2.0mm File Fit Performance Ring Set Included 65cc 66cc 70cc 402 4.000 4.000 6.125 1.110R 0.927 9.2cc 454 13.9 13.7 12.9 2618 0.500 0.0044 0.0054 930229600706 heads were per the year of the truck, and some what engine they are off of. basically gen3 ls blocks. on both 5.3l and 4.8lwhere the 4.8l had flat top and 5.3 were dished. 799/243 are the same head just depends where they were made. started getting used in the higher performance engines like the l33 and then later put on the gen 4 5.3l ...The Definitive Guide to LS Engine Specs and LS Engine Upgrades. Posted 10/03/19 by OnAllCylinders Staff. Last updated on 05/03/2024. (Image/Summit Racing) This is the ultimate LS engine swap or engine upgrade resource. Scroll through the tables below to find the LS or LS-based Vortec truck engine that you own or are interested in building.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.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? WHAT ARE TH...GM 5.3 LS Full #706-862 quantity. Add to cart. ... Features; Flow Chart; Cylinder Head Options; Technical Specs; Additional information; N/A. N/A. N/A. N/A. Additional information. Weight: 28 lbs: Related products ... GM 2.2 507 NEW FULL $ 468.00 Add to cart. Performance. Performance Cylinder Heads. PROJECT X SERIES LS XXTREME SERIES SHOCKER ...The L76—like its LS2 sibling—is a 6.0L, Gen. 4, aluminum small block engine that was used both in GM cars and trucks. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). The L76 was available in the Pontiac G8 GT from 2007-09. It was also used in some Australian Holden cars.Surprising HP Numbers From Our Stock LS Cylinder Head Test I have ported 2 sets of LS heads so far and one was the 706. I did not flow it though but I was impressed at the shapes of the LS runners. I also did some LQ9 heads for a buddy and noticed an area that looked like reversion was happening where the air comes towards …Great cylinder-head airflow has been a key enabler of the LS-Series’ exceptional performance. Chevrolet Performance delivers those power-building attributes to you with a range of production-style aluminum heads — from the LS6 heads for smaller-displacement engines to LS7 style heads for 427-inch-and-larger combinations, our aluminum heads benefit from Chevrolet Performance’s extensive ...Tech: GM 1st Gen Heads vs. Vortec Heads Reader Guide. By Bobby Kimbrough April 13, 2015. Chevrolet's small-block Chevy was manufactured beginning in 1955, and the first-generation engines (Gen I) can still be purchased as a replacement crate-engine through Chevrolet Performance. In 2005, General Motors estimated that 90 million SBC engines .... Stock springs are a no go, valve springs aren't hard at all juThe L9H is a 6.2L, Gen. 4, small block engine used in GM l 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. ... Specifications . More Information; Price: $599.95: Vehicle Make: Chevy LS: Cylinder Head Material: Aluminum: Cylinder Head Style: Bare …February 25, 2024 by Ugo Anums. The C and H in your car dashboard represent the temperature gauge. The “C” means “Cool” while the “H” means “Hot”. This gauge helps you tell your engine’s temperature. I’ll explain how the engine temperature gauge works in the following sections. The factory 706 head casting may be the best LS p The 806 heads are literally 1st gen heads, have a perimeter bolt pattern for the valve cover. Which means you need that cover and IIRC the coil packs bolt directly on the cover vs a bracket that holds the packs together. Flow is meh even when ported. You should look for 317 or 243/799 heads with the emphasis on the later for NA builds, if going ... The L76—like its LS2 sibling—is a 6.0L, Gen. 4, aluminum...
Continue Reading