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tubman · 10-20-2019, 08:54 PM

"3739" - It sounds like you are on the right track. Do you have stock heads or aftermarket ones? I find it strange that the "squish" appears to be right on. On the last two engines I build, I used second-hand Edmunds heads (I like them for reasons that are not important here), and both sets need to be milled between .025 and .050 and to get close to the "squish" figures you mentioned. I'd recheck you measurements (unless you have a set of "re-conditioned" heads). Otherwise, it looks like you lucked out.

10-20-2019, 08:54 PM	#7
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,304	Re: Location of tinfoil to check CR "3739" - It sounds like you are on the right track. Do you have stock heads or aftermarket ones? I find it strange that the "squish" appears to be right on. On the last two engines I build, I used second-hand Edmunds heads (I like them for reasons that are not important here), and both sets need to be milled between .025 and .050 and to get close to the "squish" figures you mentioned. I'd recheck you measurements (unless you have a set of "re-conditioned" heads). Otherwise, it looks like you lucked out.