questions about LS2 heads?
The #243 has a smaller combustion chamber, so it will produce more compression than the #317.
Ive read that they have the same intake ports and exhaust ports, but have no hard evidence.
Some #243 heads off of LS6 Corvettes come with lightweight valves. A lot of them have the normal valves.
#799 heads and #243 heads basically identical also, just different numbers. Ive read about cars with a #243 on one side and a #799 on the other from the factory on newer LS2 cars.
Ive read that they have the same intake ports and exhaust ports, but have no hard evidence.
Some #243 heads off of LS6 Corvettes come with lightweight valves. A lot of them have the normal valves.
#799 heads and #243 heads basically identical also, just different numbers. Ive read about cars with a #243 on one side and a #799 on the other from the factory on newer LS2 cars.
while the 243's and 317's have very similar ports,the combustion chambers are much more efficient in the 243's.any n/a engine would benefit with the 243's over the 317's
Launching!
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Note: #243 heads from the LS2 have the normal steel valves, same as LS1.
Only the ZO6 LS6 5.7 engine from 2002 to end 2004 had the lightweight valves fitted in their #243 heads.
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yea it's the 6.0L. and the the pistons are stock. no changes to the bottom. thinking about changing the cam to a stock ZO6 cam that im looking at getting. So the 243's are better? so for Performance the i should go with the 243's off any corvette 05 and up and get push the 317's aside?
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yea it's the 6.0L. and the the pistons are stock. no changes to the bottom. thinking about changing the cam to a stock ZO6 cam that im looking at getting. So the 243's are better? so for Performance the i should go with the 243's off any corvette 05 and up and get push the 317's aside?
The LQ9 version had flat-tops the LQ4 had a small dish, IIRC it was -6cc or similar.
Regardless, the 243 head is a better stock head casting.
when i got the block the pistons that was in it had a + type shape on it but one had a hole in it so i brought a set of 8 new but these are flat topped so that mean i changed it from a LQ4 to a LQ9? thanks on the info bout the heads im going to go with the 243's.
Last edited by bigwill1983; Mar 17, 2009 at 02:06 PM.
Launching!
Joined: Feb 2004
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i have the timing cover that has the cam sensor in the front. and the cam im tryning to get needs the camshaft sprocket thats reads from the front and it has to be for a 1X signal so that it is for a 24 reluctor wheel. but i found one.
