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Did the 5.3 come with 243 heads? Of course, today’s 5.3 and 4.8 both have 243 heads that are factory-designed. 243 heads were included in the LS6 engine produced between 2001 and 2006. You can determine the 243 heads on the 5.3 by examining the three-digit stamping next to the valve cover.The injector flow rate, min injector pulse, short pulse adder and the offset vs volts data is what you need to copy over. 2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy. If you don't post your tune and logs when you have questions you aren't helping yourself. Quick Navigation GM V8 Tuning - Engine, Gas (Gen 3) Top.Another thing to consider is the life span of the MTI springs. The stock GM springs are guaranteed for three years, or 36,000 miles but generally last the life of the engine. Would you have this assurance with the MTI springed heads. Below are some GM numbers for 243 heads as a comparison. Stock CNC'd LS6 heads I E.100 .200 147 111If you know how to look for heads you can buy them cheap if you know what trucks they came on. Go here and look, I have seen them as cheap as $100 a head. www.car-part.com. 2013 inferno orange ZL1 Camaro, basic mods. Pulley, injectors, mild bolt on's- 590rwhp. 11.70@122 with a six speed and a hard tire.Nov 12, 2009 · ported 243s, ls2 stock shorty + cam. procharged. 740~whp. That sounds healthy. If I can pull off 700 rwhp like that through my A4 for the time being with 234's or 317's I think I'll be satisfied. SOFAKINGGR8 said: Numbers in sig, recently made over 700whp a few weeks ago, and have been over 600whp since April.The LS2 is a Gen. 4, 6.0L, aluminum small block engine. The engine specs and information listed here is for the stock LS2 used in GM passenger cars from 2005-2007. 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 ...But these heads also saw duty on some 1962 and 1963 full-size Chevy passenger cars with the 300 hp 327. Those produced in the Tonawanda plant were exclusively used on those bigger cars. Flint heads saw duty on both full-sizers and Corvettes. The heads are quite easy to identify, as they sport an “X” underneath the #1 …Scoring a 4.8 or 5.3 with 243 factory heads tomorrow. It's out of a 2007 Tahoe. I've been told that 4.8s didn't come with 243s only the 5.3s? Can anybody verify? I'm only paying $150 for the whole thing so I'm pretty happy. Also, is there a way without the vehicle vin to identify what it is...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 ...05 and newer l33 aluminum 5.3 come with the 799 and I believe some vettes even had them on the ls2. The 243's came on the ls6 with sodium filled valves, and with normal valves on alot of the ls2 engines and very new 5.3's like 08+ iirc. 799 is basically a copy of the 243.Ok here is the truth, After working with 305 heads for almost 10 years. They can be good heads mostly for people who can not afford better or doing your best with what you have. Compression can be sometimes a problem but mostly this is not true. In most cases a piston is .020-.035 in the whole and a .040 or so gasket with a 58cc chambered head ...Parts included in build of motor are: AES 403 LS2 Block - 11:5:1 Compression. Callies Crank. Callies Rods. Diamond Pistons. Total Seal Rings. ARP Hardware Kit. AES Ported LS3 Heads (With all the top upgrades ) 241/252 6**/6** 112LSA.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 …C6 Tech/Performance - 243 Cylinder head question - I have someone who wants to sell me some cylinder heads. They have the 243 casting number, but on the inside of the head, it is stamped 5.7. I am not sure if these are heads for an LS6 or for an LS2 motor. I also have a part number of 12564825.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 ...Jul 16, 2007 · Thanks. 853 and 241 are basically identical. 853 was used on 99-00 LS1 engines. 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.We may earn a commission for products purchased through links on this pageWhy not come to your next water fight properly equipped? An off-the-shelf squirt gun is too light weight and you can't drag a hose everywhere. Build a head mounted water-cannon and...An interesting finding is that in contrast; an Lported 243s, ls2 stock shorty + cam. procharged. 740~whp. That If you are asking, “What did 243 heads come on?” The 243 heads were typically found in GM’s C5 Corvette; however, it was later ported and now found on …But keep in mind, the 241 castings have a 65CC chamber roughly, versus teh 63.5CC chamber on the 243. When using a combo like Bill's, more compression will really help and wake it up down low, even more than the normal 63.5CC chamber. We're probably going to make his 60-60.5CC's and bump him to 11.5:1. 241 was used on 01-04 LS1 engines. They both hav Join Date. Nov 2008. Location. Spring, TX. Posts. 2,228. 243 heads are the same as 799 heads which are found on the LS2's, same block as LQ9. you will need to match your valvetrain to your cam. i dont foresee any ptv clearance issues but you need to make sure you have the right valvetrain. Skeet is running a similar duration cam with his 243's ...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 ... The Gen III block can be iron or aluminum, and you will see

Identical heads would be the 799s. They don't have the cult following of the 243s, so they're often found cheaper but they're the same head, just cast at a different plant. The only difference in the "regular" 243 from the LS6 243 is that the LS6 version had lightweight valves and special springs.706 heads are very affordable. 706 heads are plentiful and easy to find. 706 heads have smaller chambers, so you don't lose compression. 706 heads are slightly superior to 862 heads due to how ...Compatible Engine Type. Anyone who is considering getting either the 799 or 243-cylinder head needs to know about their engine compatibility to make sure they …If your really sly, the best engine to find is a 88-91 Roller Cam 360 with the 308' cylinder heads. What do those come on, you ask? 88-91 W series trucks 88-91 D250 88-91 4x4 Ramchargers *(notice) nothing in the Car Line Good Luck.

If the 243 head is off of a Z06 and has yellow valve springs then it will have lightweight valves which drop valve train weight. 243 heads are better in every aspect then the 241 heads but 241 heads are not junk either. They are a good head. ┌∩┐ ( _ )┌∩┐. Man: The Mods you are fighting,Richard is the man with any question you could possible have. If you don't go though a vendor like that, a set of worked 243/799 that have been milled .030 would be great. I would venture to say that WCCH could build you a head that outperforms anything else on the market hands down. AFR isn't bad by any means though. They make a great ……

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. The LS2 is a Gen. 4, 6.0L, aluminum small block e. Possible cause: Find Parts and Accessories 243 cylinder heads KEYWORD and get Free Shi.