Most heads are swappable but some will reduce power. Some won't fit as some heads are designed for a wide bore. But don't worry, most LS heads are so good ...The heads should bolt up fine to an LS2, but you'd need to flycut the pistons and get all the LS7 intake stuff. IIRC cam lift on the LS7 was in the .59x/.58x range. I do know it was reverse split on the lift and standard split on the duration. '06 Passat 3.6 4motion w/ Nav. '91 RX7 LSx/T56 conversion.Illustration by David Kimble. Other than the displacement (5.7L / 347.5ci), the aforementioned rod bearings and physical dimensions with previous generation LT1 small block, the LS1 was a new all-aluminum single-cam pushrod engine with a bore and stroke of 99 mm × 92 mm (3.898 in × 3.622 in) making this GM's first all-aluminum production V8. With the advancement of materials over the ...Summit Racing™ Precision Cast Cylinder Head SUM-162LS210CATH. Chevy LS Cylinder head, 210cc Cathedral port Intake Runner, 64cc Chamber, 2.02 Intake Valve 1.6 Exhaust Valve, 3.898+ bore sizes, Max .600 Lift Ea. Part Number: SUM-162LS210CATH. ( 1 ) Estimated Ship Date: Today.The L33 is a 5.3L, Gen. 3 small block engine used in GM trucks between 2005 and 2007. Although it is a truck engine, it used cylinder heads closely related to the LS2 and LS6. The engine came with flat-top pistons for increased compression, and has a unique camshaft. For marketing purposes, it was known as the Vortec 5300 H.O.Avoiding 706 castech heads. Hey guys, I just joined this forum because I am looking to buy a silverado/sierra soon but still have a couple questions. Right now I'v got a 2004 5.3 tahoe with leaking castech 706 heads. Iv decided to trade it and and I'm trying to avoid having the same problem again with my new truck.BARE GM LS 243 HEAD - 4.8L, 5.3L & 6.0L. Generation III V8 cathedral intake port cylinder head. Casting 12564243. For truck, van, SUV and perfomance applications. Used on LS6, L33, L20, LH6, LY5, LMG, LC9,LS4, LH8, LS2, LFA, LZ1 engines. Generation III cylinder head for V8 truck, van, SUV and perfomance applications often called an LS6 …Product Details. Beehive style springs. Used on LS7 cylinder heads. 1.960" installed height @ 101 lbs. pressure. 1.368" @ 310lbs. pressure.1697 posts · Joined 2011. #3 · Aug 19, 2012. From what I understand the crank and rods are the same specs. The bore and stroke of a 5.3 is 3.780 x 3.622. Rods are 6.098 in length. The iron block can be bored to an LS1 bore of 3.900. The aluminum block has sleeves and can be bored .010. So you can use your crank and rods and a set of LS1 pistons.706 and 862's are small bore (4.8/5.3) gen 3 heads. You might be better off picking up a set of 243/799 heads, doing a VJ and pocket porting those. Will need a newer set of valve covers though. mag2555. Guru. Posts: 4623. Joined: Sun Sep 18, 2011 3:31 pm. Location: Heading for a bang up with Andromeda as we all are.Cylinder Head, Pro Action LS Cathedral Port, Bare, Aluminum, 65cc Combustion Chamber, 0.570 in. Lift Springs, 15 Degree, Chevrolet, LS, Each. Part Number: RHS-54240-06. Not Yet Reviewed. Free Shipping; Special Order...Loading Not Available At This Time. This product cannot be ordered at this time. Future availability is unknown.Found a set of 706 heads to port. ... Any do's and don't on these as porting work is all over the place on LS heads on line. L-29 461 BBC 11.10@118mph 9-30-22 10.65@125mph 406 with home ported Dart 215 heads. 10 sec. Vortec 062's 406 w/hyd. cam and stock rocker armsThe 70 LS-6 used the 291 closed chamber head the 71 used an open chamber head. They sold crate LS-6s that they lowered the compression on because of the bad gas with 188 open chamber heads. The real 450HP LS-6 had 291 closed chamber heads. 188 heads are not worth a lot of money there are just too many better heads made today.The 317 heads can flow up to 20 cfm at specific lift points more than the 706 heads. 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.An LH6 build or LC9 5.3 build is popular for those on a budget just looking to make a nice 400-450 HP for a cheap LS 5.3 junkyard build. Any of these will work in a classic hot rod or muscle car using one of our LS swap oil pans for clearance. The one Gen 4 5.3 LS we do not recommend using is the LS4.706 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.Crate Engines, Gen 3-4 LS; Crate Engines, Gen 5 LT; Cylinder Head Parts & Services; Dry Sump Oil Pumps & Parts ; Fuel System Parts; Gaskets & Seals; Harmonic Balancers; High Performance Fasteners; Ignition Parts; Induction Parts; Jacking Pucks; Katech Wheels; Motorsports - TA2 Parts; Oil Pumps & Related Parts;862 Heads vs 706 - Specs Comparison. Specifications: 862 Head: 706 Head: Combustion Chamber Volume (cc) 64: 71: Chamber Shape: Modified Heart: Rounded: Intake Valve Size (Inches) 1.94: ... LS 706 Head Specs [Features & Comparison with Other Cylinder Heads] Connect with Us. X social media profile;The intake manifold is the most important element in swapping from a cathedral to a rectangular port head. To match the runners, this factory LS3 (PN 12610434) or an L76 manifold are the most popular. It is important to note that there are some minor differences between the L76 and LS3 intakes, such as a screw-in MAP sensor instead of the Gen ...Quote: Originally Posted by lil john. True Tuskyz, also the 821's have less meat, *Some porters don't like to go over 270'cc while the the 823's are good to around 280'cc. Phil @ Advanced Inductions gave me a quote on the 280cc version on my #821 heads. Reply Like. 08-12-2016, 09:11 AM.The heads with the casting flaw were the 706 castings made by castech from 2000-2005. The 862s are functional equivalents from the same years and were never suspect for cracks. Some early LS heads from 98-01, both the 853/806 LS1 and the 706/862 5.3/4.8 had the casting notch. The notch disappears sometime in 2001 but nobody is sure.As mentioned about the LS 823 heads specs, its bigger intake port owns a 70cc, whereas the common 243 L6 cylinder heads have basically a smaller volume at 64cc. ... 823 vs 706 Heads. The 706 cylinder heads are built to generate excellent performance, which can reach up to 4,000 rpm.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 ...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 + …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.Record the amount of water added and the mass of the soil-filled mold. 5.1.3 Remove the material from the mold and cut vertically through the centre, taking a representative portion to determine and record the moisture content according to the Method of Determination of Moisture Content of Soils (MTO Method of LS-701).MikeEC. 5 posts · Joined 1998. #4 · Nov 28, 1998. The LS6 heads for '71 are open chamber rectangle port and should carry casting number 6272990 or 14096188 if they are cast iron. They will have the words "HI PERF" cast in to them as well. The LS6 was available as a crate motor until the late '80s.Below are its specifications. 706 5.3L Truck Castings. Valve size: Intake- 1.89, Exhaust-1.55. Port Volume: Intake- 197cc, Exhaust- 69cc. Combustion Chamber: 61.5 cc. Benefits of Casting Chevy 706 Heads. Most affordable, powerful, and effective. Superior to 862 heads in reliability and performance.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 cam 218/227 long tubes and a lid plan on doing heads and a LS6 intake. I know 243's are good but didn't know if 862's are any good when they're right in front of me. They won't flow as good as ...Equipped with Wiseco forged internals, the 5.3L was first run with a stock LM7 cam, 706 heads, and early truck intake. By all measure, this was essentially an LM7 with forged pistons and rods and ...Advertisement The variety of Android tablets on the market make it difficult to sum up specifications. Android tablets are really just specialized computers. In general, most table...The BMW Motorcycles Channel includes histories, photos and specs for BMW motorcycle models. Explore BMW motorcycles on HowStuffWorks. Advertisement The BMW Motorcycles Channel incl...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, …Much like that very realistic scenario, Chevy's L76 and L77 engines are actually LS engines. And though the majority of people might call them Vortec engines, GM's small-block 4.8L, 5.3L, 6.0L, and 6.2L truck engines from 1997 through Gen IV are still very much members of the LS engine family. The LS1 was the first mill from GM's Gen III ...Had 10.7/1 comp, 243/258/110 comp cam with .625" ish lift. sv intake, 243 heads ported reasonably well with 2.02" 1.56" valves 50* seats, whitener 4150 carb. Pump gas pulls were the best on tq vs av gas but same hp. It made 590 Lbs TQ and 625 HP. it came in the start of the pull at 4000 rpm making 575 LBs.The 6.0 is assembled and already dropped in! Should have that footage ready for you all around the weekend. I had a lot of fun making this video, hope you gu...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 …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.WHAT 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...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 ...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 family ...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.The L94 is a 6.2L, Gen. 4, small block engine used in GM luxury trucks and SUVs between 2010 and 2014. For marketing purposes, it was also known as the Vortec 6200. The engine specs and information listed here is for a stock L94 engine. Mechanically similar, General Motors' LS and LS-based Vortec engines wound up on almost every branch of the ...According to the trusty flow bench, the chamber work did indeed improve the flow rate of our 706 heads, with the largest gains coming at 0.200 lift for the intake and 0.400 lift for the exhaust ...Step-by-Step Guide for Torquing Head Bolts. To ensure the proper torque of the head bolts, follow these steps: 1. Start by cleaning the threads of the head bolts and the bolt holes in the engine block using a suitable cleaning agent. 2. Apply a small amount of engine oil to the threads of the head bolts. 3.Description. CNC Ported LS2 - 243 CYLINDER HEADS - Flows 632HP @ .600" lift camshaft! Suits the 5.7ltr and 6.0ltr LS1 & LS2. LS1 LS2 CATHEDRAL PORT. These High Performance LS1 LS2 243 Cylinder heads are a CNC version of the High Performance replacement to the GM 243 heads. All factory mounting points with the Performance of a 243 port and chamber.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.Age. 34. Posts. 1,561. Red. 2001 Camaro SS A4. 706 heads on '01 LS1. Just wondering if anyone has played around with this before...I have access to some 5.3 heads (706) and was wondering how how these would do on the LS1 and what type of gains I could see with these. 12-01-2008, 05:31 PM #2.European Union countries and the Commission have agreed on a technical framework to enable regional coronavirus contacts tracing apps to work across national borders. A number of E...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 …The final test was the 246 cam, with .624 lift, a 246/254 degree duration and 114 degree LSA, but with less-than-stellar results. The peak horsepower numbers remained at 626 hp, but peak torque dropped to 575 lb.-ft. In fact, torque production dropped through the entire rev range! Sometimes, even on a stroker, bigger is not always better!241 was used on 01-04 LS1 engines. They both have a 66.67 cc combustion chamber (10.1 CR), 200cc intake runners, and 70cc (round) exhaust ports. The 243 head is the 01+ LS6/LS2 head. It has a smaller 64.45cc chamber for more compression (10.5 CR on LS6), 210cc intake runners, and 75cc D-shaped exhaust ports.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 be hard-pressed to hit 500 with a NA 5.3.BARE GM LS 243 HEAD - 4.8L, 5.3L & 6.0L. Generation III V8 cathedral intake port cylinder head. Casting 12564243. For truck, van, SUV and perfomance applications. Used on LS6, L33, L20, LH6, LY5, LMG, LC9,LS4, LH8, LS2, LFA, LZ1 engines. Generation III cylinder head for V8 truck, van, SUV and perfomance applications often called an LS6 head. It ...Despite an increase in chamber size, the factory 317 heads flow better than the smaller 706 (and comparable) heads usually found on the 4.8L/5.3L twins. Run in a similar fashion on the engine dyno, a stock 6.0L will produce a solid 70 hp more than a 4.8L (404 vs 335 hp in our last test), and 45-50 hp more than the 5.3L (404 vs 352 hp in our …706 Heads Specs. High-performance cylinder heads like the Chevy 706 LS Heads provide a ton of power at an unbelievable cost. They are the most cost-efficient and efficient remanufactured cylinder heads available, and …MikeEC. 5 posts · Joined 1998. #4 · Nov 28, 1998. The LS6 heads for '71 are open chamber rectangle port and should carry casting number 6272990 or 14096188 if they are cast iron. They will have the words "HI PERF" cast in to them as well. The LS6 was available as a crate motor until the late '80s.The LS3 is a Gen. 4, 6.2L small block engine used in GM performance cars between 2009 and 2017. The engine specs and information listed here is for a stock LS3 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, …3,581. they used to install the 2.0 valves into the 5.3 heads but TSP found out that installing the larger valve actually hurts the flow of the head since the runner was never designed for that size intake valve. 2002 Lightning - GT headed 5.5Litre w/ Twin 7665s. 2002 Silverado - 427Lsx w/ Twin gt4202s.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 have other competitive features; however, depending on your car’s needs and budget, the 862 cylinder heads might be a good port for you.If you’re in the market for a compact SUV that offers style, versatility, and advanced features, look no further than the Hyundai Kona. This popular vehicle has been turning heads ...Unless your building something something over 7000rpm an OEM head is the way to go. People routinely get 1000hp out of them. On 4.8, 5.3, 5.7, NA 6.0 - I always recommend the 243. Maybe even milled a touch if needed. On 6.0+ the 823 variant of the rectangular head is great. 65 Chevelle Malibu 2dr HT LS Swapped.Run in this trim on the dyno, the little 4.8L produced peak numbers of 409 hp at 6,600 rpm and 367 ft.-lbs. of torque. Now it was time for boost! Boost was supplied by the S475 turbo from Summit Racing. The twin-scroll, T6 turbo featured a 75-mm compressor (inducer) and an 88-mm turbine (exducer).Feb 18, 2024 · This also means that they are usually cheap to collect or replace. 706 heads tend to be more popular than 243 heads with those who run naturally aspirated engines. While they don’t have the same size combustion chamber they also don’t have the tendency to lower the compression ratio and reduce horsepower. When looking to replace your heads ...The final test was the 246 cam, with .624 lift, a 246/254 degree duration and 114 degree LSA, but with less-than-stellar results. The peak horsepower numbers remained at 626 hp, but peak torque dropped to 575 lb.-ft. In fact, torque production dropped through the entire rev range! Sometimes, even on a stroker, bigger is not always better!Advertisement The variety of Android tablets on the market make it difficult to sum up specifications. Android tablets are really just specialized computers. In general, most table...Advertisement The variety of Android tablets on the market make it difficult to sum up specifications. Android tablets are really just specialized computers. In general, most table.... The only difference is the marking stamped on toSummit Racing™ Precision Cast Cylinder Head SUM-162LS21 Texas Speed Brawler LS6 Style Cathedral Port CNC Cylinder Heads. Fits 1997-2013 LS-Based Engines 4.8L 5.3L 5.7L 6.0L . If you are looking for great factory style replacement/upgraded LS1/LS6 Cathedral Port cylinder head, look no further than these fully CNC ported Brawler cylinder heads! These all-new castings are modeled after a factory GM 243 ... If you're planning on higher than stock rpm or LS2 heads work by increasing the airflow to the engine, which in turn improves engine performance. This increased airflow is achieved through several design features, including larger ports, larger valves, and better flow characteristics. LS2 heads are designed to work with LS engines and are typically a direct bolt-on replacement for the stock ...1138 posts · Joined 2009. #1 · Nov 27, 2017. I have a matching pair of 1970 LS6 heads that I removed from my wrecked LS6 in 1974. The part # is 3964291 and they both have a C 6 70 date code. My brother had these until I got them back after he passed away. The factory 706 head casting may be the best LS performance...
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