799 Vs 243 Heads. 243 vs 823 combustion chamber. My stock compression ratio is 9.5:1. Any help would be greatly appreciated im not afraid of doing the work just there is so much to the technical aspects of it. Vehicle enthusiasts argue about 243 heads vs. Cnc ported gm cylinder heads , cylinder head porting services , ls , ls1 These are cnc ported heads. Both heads have identical sized intake and exhaust valves They will bolt right up and should give you i think around 10.5to1 compression. Meanwhile, you must contact an expert auto mechanic with an intensive understanding of performing the porting job. From what i can find on the truck forums these are the same as 243 heads without hollow valves or sodium filled i think it was. You might want to do some research into the 243. There was much uproar among 799/243 head enthusiasts. The 317's and 243's flow just about the same however the testing by wcch has shown a small increase of flow (stock 243's vs stock 317's) going to the 243's most likely due to the better designed combustion chamber. 706 5.3l heads vs 241, 799/243 vs 317s. They are pretty good stock heads.
799 is the same as a 243 head that comes on the ls2/ls6 ect. Im running a set of 243s milled and p&p on my lq4. Gm's #243 or #799 ls6/ls2 head casting is the most sought after gm cathedral port casting. At a mere 15 cc over stock volume this particular port sees gains of over 40 cfm on the intake utilizing a factory gm 2.00 valve. They are pretty good stock heads. Expected to ship in 10 business days. 243 vs 823 combustion chamber. The 799 heads were basically identical to the 243 heads and offered intake flow (at.700 lift) near 250 cfm. There was much uproar among 799/243 head enthusiasts. Supposedly, the 243 mold was done at gm research, the 799 mold furnished to other vendors.
Still A Desirable Set Of Ls1 Heads Though!
New qualcast stainless steel swirl polished valves. 243 came with sodiom filled stem 1.55 exhaust valves (lighter and more heat dissepation) and 799 came with regular solid stem 1.55. Just to get to stock, i need to mill.023. 200 cfm intake and 70 cfm exhaust for the 241's, and 210 intake and 75 cfm for the 243's. Vehicle enthusiasts argue about 243 heads vs. Intake is 2.02 and exhaust is 1.59 valves. Cnc ported gm cylinder heads , cylinder head porting services , ls , ls1 The 799 cylinder head is a better choice than the 243 cylinder head because it has more capacity. We compared the four most popular stock ls heads in a back to back shootout.
I Already Know That I Need To Mill The Heads.007 To Lose 1Cc Of Volume.
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. There are three basic differences between the ls1 and ls6 heads. In the case of the ls3 and (especially) ls7, the factory heads offer exceptional airÂflow. The 799 cylinder head is better for cars because it is more efficient than the 243 cylinder head. If you are familiar with the 243 or ls6 cylinder head, you know that the chamber has a quench pad behind the spark plug thats relatively straight and the combustion chamber size is roughly 64cc's which for the combination i have already built, produced 10.2:1 compression which is very pump gas friendly. The stock heads have a combustion chamber volume of 61.15cc, and 243/799 heads have a volume of 64.45cc. These heads have been disassembled, inspected, cleaned, 5 angle valve job, and milled slightly to clean up the heads. However, if you desire improved horsepower with excellent power output, the 243 cylinder head is a perfect choice. 243 vs 799 heads r these 2 heads the same there is a low mileage set on ebay and they claim they r same as the 243 came off a 5.3 ho 89' gmc rcsb 6.0l lq4, t56, 4.56 gears.
However, 317 Heads Have Larger Combustion Chambers Of 71.06Cc, Which Will Cost Performance, Especially On A Naturally Aspirated Engine.
243 vs 823 combustion chamber. #2 · jun 6, 2011. Gm's #243 or #799 ls6/ls2 head casting is the most sought after gm cathedral port casting. 243/799 are functionally the same, as @art notes the difference is casting facility location. The 317's and 243's flow just about the same however the testing by wcch has shown a small increase of flow (stock 243's vs stock 317's) going to the 243's most likely due to the better designed combustion chamber. 100% cnc'd 226cc gm ls6/ls2 cylinder head package. There was much uproar among 799/243 head enthusiasts. My stock compression ratio is 9.5:1. Just depends on what they pick up to send to you.
Expected To Ship In 10 Business Days.
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. As for gains on just the head swap.i have read results of about 20hp from the added compression alone. Most people tend to prefer 317 heads as they have improved ports, same as 243 and 799 heads, which are more expensive. They will bolt right up and should give you i think around 10.5to1 compression. 799 is the same as a 243 head that comes on the ls2/ls6 ect. Both heads have identical sized intake and exhaust valves If you buy heads from somewhere like patriot or prc, you will get either a 243 or 799 casting. The first has to do with port shape. 706 5.3l heads vs 241, 799/243 vs 317s.
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