Decking 241 heads
Decking 241 heads I am trying to find out how much I would have to deck a set of 241 heads to get 10.5:1 on stock ls1 pistons. Also would I have to worry with valve clearance on a .580 lift cam?
if its an LS1 241's its 10:1 if its an LS6 243's its 10.5:1. Very little like .001 will get you somewhere around 10.5 depending on the chamber size. I had mine done .003 w/ 59cc chambers and I was running 11.5:1 w/ a 600 lift in and out cam.
.015 will get you where you need to be.
FYI LS1s are 10.1:1, LS6s are 10.5:1.
The lift of your cam won't matter as much with PTV clearance, as duration and ICL. Whats the duration and LSA/advance on the cam?
FYI LS1s are 10.1:1, LS6s are 10.5:1.
The lift of your cam won't matter as much with PTV clearance, as duration and ICL. Whats the duration and LSA/advance on the cam?
i belive you mean .010, and yours being milled .030. for every .006 that is milled its approx 1cc.
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Another option would be to run .040 thick gaskets (I believe stock is .053) for almost the same results without the machine shop labor. Of course that is assuming your deck surface is square and free from imperfections.
General rule of thumb is 1cc for every .006 removed on LS heads. Chamber size & shape will change that figure for different engines though.
General rule of thumb is 1cc for every .006 removed on LS heads. Chamber size & shape will change that figure for different engines though.
