Compression and pushrods
08-08-2009, 05:46 PM
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Compression and pushrods So I put a set of 241s that were milled .026 on my car and also a .029 headgasket as opposed to .040. How do I calculate my compression now? And also, the car spits and sputters like crazy when driving, but idles fine, so I assumed that my tune was way off but then it dawned on me that my pushrods are most likely too long now that my heads sit .037 closer to the block. I was running 7.4's because that was reccomended with my cam, but Im thinking I need some shorter ones because I dont believe my valves are closing competely. Is this on the right track of assumption at all? Any and all help appreciated!
Edit* Just for reference, my setup is the same as in the signature still, Torquer V.3 with the only new addition being the milled heads and some LS7 lifters.
Edit* Just for reference, my setup is the same as in the signature still, Torquer V.3 with the only new addition being the milled heads and some LS7 lifters.
Last edited by Red96TA; 08-08-2009 at 05:58 PM.
08-08-2009, 06:11 PM
#2
TECH Senior Member
A couple of things:
>You need to measure for pushrod length, you'll probably need shorter than 7.400
>Also you need to measure your piston to valve clearance as you are on very, very tight clearances. I estimate less than .04x
>and last .029 gasket is a bit too thin since you are now in .022>.024 range quench (too tight)
>You need to measure for pushrod length, you'll probably need shorter than 7.400
>Also you need to measure your piston to valve clearance as you are on very, very tight clearances. I estimate less than .04x
>and last .029 gasket is a bit too thin since you are now in .022>.024 range quench (too tight)
