What did 243 heads come on
GM Engine & Exhaust Performance - lm7 with 243 heads - hey, I am new here and have been looking at some of the posts. I am going to be pulling the heads on my 03 sierra 5.3 lm7 and was considering putting on some 243 heads with a .040 cometic gasket to bring the compression to 9.8. my concern was with torque, I use...For instance, the 799 cylinder heads come with a smaller combustion chamber than its counterparts. So porting to 799 LS heads would mean milling the cylinder heads to cover up for the bigger size of the former combustion chamber. Material Make. The 799 heads have an aluminum build that can withstand high temperatures. Aluminum is a good ...
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The 243/799 cylinder heads come with a 2.00" intake valve, 210cc intake runner, a 1.55" exhaust valve, 75cc exhaust runner, and it has a 64.5cc combustion chamber. The 243/799 3cc bigger combustion chamber might not seem like much but let's look at the factory Compression Ratio as seen here. And then compare it with the 243/799 cylinder head ...So I have been playing around with some 243 heads, ported them to 225 cc on the intake port left the intake with a carbide finish and ported the exhaust to 83 cc stock the heads are 215cc/75cc. I just did a standard clean up bowl porting remove the rocker boss trim down around the guide valves are 2.02/1.57 cheapo stainless valves I was …May 25, 2015 · Phil @ Advanced Inductions gave me a quote on the 280cc version on my #821 heads. We have seen no issues with thickness in the 823 vs the 821. Our port comes in at 282cc and the same cnc program is ran in both heads. The only heads that we have seen thickness issues with is the 5364.With a massive online catalog, you can easily view our inventory of Chevy 350 cylinder heads. The knowledgeable staff at CCH would also be happy to help you choose the cylinder head that is right for your needs. Contact Clearwater Cylinder Head Inc. toll-free at 1-800-572-1963.On April 28, 1988, just before 2 p.m., Aloha Airlines flight 243 made an emergency landing at Kahului Airport on Maui. "What really got us was people strapped into the seat, not moving, arms ...When it comes to the question of which models had 799 heads, it is clear that truck manufactured in 2005 and later are equipped with these heads. This includes newer models of 5.3L and 4.8L trucks, which were given the 799 head design to increase performance and efficiency on these engines. Furthermore, this trend continued into 2010 when Chevy ...Off the shelf VN heads outperform B-Cast heads in flow rates. VN heads on an early motor will yield higher horsepower with a narrower torque band vs less HP with early heads and a wider torque band.. Can you stroke a 253? To get the right deck height with a 253 mini stroker you need to use the 305 piston which neccesitates the 0.110″ to 0.140″ overbore.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 ...Apr 2, 2020 · No matter, we swapped out those .480-inch lift truck springs once again for the performance-oriented Comp units and bolted our 243 heads on top of the LY6 6-liter, using the same Edelbrock ...It is an aluminum block 5.3 with either 706 or 862 heads, NON DOD. The 05-09 GMT360's got the LH6 and the 07+ will more than likely have 243/799's. In 07+ all the 5.3's started getting the 243/799 heads. The early years will obviously depend on what 5.3 equipped vehicle you have.Exhaust flow at .600" - 180 (241) / 183 (243) The 243 heads have a D-shape exhaust port that improves flow and came with higher lift valves springs. Both heads came with 2.00" intake valves and 1.55" exhaust valves. To my understanding, this is all the difference. Last edited by R6cowboy; 02-26-2011 at 01:52 PM.Equipped with the 317 heads, the turbo 6.2L produced 807 hp at 6,800 rpm and 747 lb-ft of torque at 4,900 rpm. The boost pressure peaked at 7.6 psi, before dropping to 6.9 psi at 7,000 rpm. The ...243 04 up LS6 aluminum center bolt 5.7 ***These castings were also used around 05 in truck applications*** 862 99 and up 4.8-5.3 Truck heads 706 99 and up 4.8-5.3 Truck heads 799 05 and up 4.8-5.3Truck heads ***reportedly came on a few corvette's too*** These are basically 243 Heads 873 99-00 LQ4 6.0 Iron center bolt headsApparently 243 is also a Castech head from the picture above my post. Is it only the 706 that has problems, or is it any head from Castech? I seriously doubt the dealer that has a '02 I'm looking at is going to pull the valve cover and rockers to look for one little symbol. ... Come join the discussion about performance, modifications ...
Aug 3, 2022 · 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. 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 ...041's are a 1.94/1.50" valve 64cc head from the 1969 295hp 350 and the 1970 300hp 350,, same engine as none of the actual specs changed. The heads are better than low power crate engine heads. When using 64cc heads,,,, Flat top 327 is about 9.5:1 compression. Flat top 350 is about 10:1.706 heads, also known as "706 cylinder heads," are a specific type of cylinder heads commonly used in engines produced by General Motors (GM), specifically in their LS series. These cylinder heads are quite popular among engine enthusiasts due to their compatibility and desirable features. The name "706" comes from the casting number ...Exhaust flow at .600" - 180 (241) / 183 (243) The 243 heads have a D-shape exhaust port that improves flow and came with higher lift valves springs. Both heads came with 2.00" intake valves and 1.55" exhaust valves. To my understanding, this is all the difference. Last edited by R6cowboy; 02-26-2011 at 01:52 PM.
LS1 LS6 243 / 799 Aluminum Cylinder Head CNC Porting Service ( Customer Supplied Bare Heads ) CNC Ported LS1 243 / 799 Cylinder Heads, Customer Supplied Bare Casting heads. $599.95. Options. Valve Job with new Valve Guides + $400.00. Resurface for MLS Gaskets + $150.00. Cylinder head Assembly + $150.00.What heads came on 6.0 LS? What did 823 heads come on? What did 243 heads come on? 9 Minutes Read . Our team of experienced writers and industry experts are dedicated to providing valuable and informative content to help you make informed decisions about your next car purchase. Stay tuned for exciting content and join the conversation by …243 didn't come on 5.3s.look for the casting number on the head.get some 243s for $400 at the ls corvette forums.do a good valve job and install good springs,comp918 etc..if you have the money and know a good head porter ,port the heads.the 243s will add 20 hp .450 rwhp takes great heads and intake,a lot of supporting mods ,and the right cam.it can be done ,whats your budget.…
Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Factory has the 862 heads. I’ve been offered a 5.3 block. Possible cause: Colleges and new high school graduates have what I think is a strange idea. The.
Just a rule of thumb, Most your 70's 454's will come with either the 781's or 049's unless it's a early rectangle port motor. Once you get to 1980 you start seeing way more of the 454's with peanut port heads. I won't list actual years, this is just a rule of thumb when I am looking to get a 454 core motor. 1968 Chevelle Sb.799 05 and up 4.8-5.3Truck heads ***reportedly came on a few corvette's too*** These are basically 243 Heads. 873 99-00 LQ4 6.0 Iron center bolt heads. 317 01 and up LQ4 and LQ9 6.0 aluminum center bolt heads. 035 01 - 04 LQ9 6.0 aluminum center bolt heads. Even more detailed info: Casting Numbers 241, 806, 853.
The 882 head is the most produced chevy cylinder head over and above all other casting numbers. They were produced in the millions and if you are rebuilding a 70's era 350, more than likely it will have a set of these heads on it. There are different variations of the 882 head, which has been stated already.Sep 1, 2017 · The LS6 also received better (243 castings) heads, a slightly more aggressive cam, and a much improved intake manifold. The LS6 cam is the most aggressive cam GM put out for cathedral port headed ...Head gasket repair can be an expensive, but necessary repair for your vehicle. Knowing the average cost of a head gasket repair can help you budget and plan for this important main...
What did LS 823 heads come on? While General Motors first launch 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 ... It includes a new ported/blueprinted LS6 oil pump85 posts · Joined 2006. #1 · Aug 31, 2014 (Edited) I' All 5.3L NNBS motors either came with the 799 or 243 heads and flat top pistons. REMEMBER--just because the heads say '243' doesn't mean it has the lighter weight valves and upgraded valvetrain like the 243 heads that were on the Z06 Corvette. Any 799 or 243 head found on a truck had the regular valvetrain.assembling my ls1 with 243 heads. No modifications to do a head swap, but if both are sto It happens to even the best DIYer: the simple process of removing a screw becomes a struggle when the screw refuses to budge and the head of the screw becomes stripped. But not all... The 799 and 243 casting Cathedral-port cylinder heads can be CNC Manish Maheshwari, the former head of Twitter IndiThe 243 heads produce about 5% more power on flow alone. If you w 243 Heads/Cam Dyno. 8642 Views 94 Replies 20 Participants Last post by Perdieu, Jul 5, 2006 Jump to Latest Baaa ...The 243 heads are factory cylinder heads that were used on the LS6 engine found in the 2001-2004 Chevrolet Corvette Z06. They are made of aluminum and have a small combustion chamber, which can result in high compression ratios. 862 heads vs 243. The 862 casting number represents the 862 cy If they are truly 243 heads from a GTO, they originally were on a 05/06, not a 2004. It's possible they were swapped onto a 2004 GTO at some point, but they are not stock heads. The casting itself for a LS2 243 head is the same as a LS6 243 head, only the valves are different. They will bolt up to a LS1 block just fine. The LS 243 Cathedral Port cylinder heads are renowned for th[Buy GM LS2 LS6 Gen III Gen IV Remanufactured Cylinder Heads 7243 04 up LS6 aluminum center bolt 5.7 ***These Head gaskets are essential components of an engine, and when they fail, it can be a costly repair. Knowing the cost of head gasket repairs can help you budget for the repair and ma...