.040" HG on stock cam LS2
03-03-2012, 11:56 AM
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.040" HG on stock cam LS2 I'm going to be installing some L92s on my goat. They're milled for 64 cc chambers (same as LS2), so it will be no issue to at least maintain stock compression. The car has basic bolt-ons.
While I have it apart, I'd like to cash in on the advantages of running tighter quench. So I want to install a 4.085" bore, .040" thick Cometic gasket. I was considering a .036" (if available? and if the piston isn't too far out of the hole) but I think that will push compression too high.
I'm coming up with about 11.4:1 static. Using stock cam specs I found on CF, I calculated about 7.8:1 DCR with the thinner gasket, but I found conflicting data on here. My question is, will this be too much compression for the stock cam on 93 octane?
While I have it apart, I'd like to cash in on the advantages of running tighter quench. So I want to install a 4.085" bore, .040" thick Cometic gasket. I was considering a .036" (if available? and if the piston isn't too far out of the hole) but I think that will push compression too high.
I'm coming up with about 11.4:1 static. Using stock cam specs I found on CF, I calculated about 7.8:1 DCR with the thinner gasket, but I found conflicting data on here. My question is, will this be too much compression for the stock cam on 93 octane?
Last edited by C5Shark; 03-03-2012 at 12:18 PM.
11-27-2018, 02:13 PM
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Big Hammer brings up a good point. On an iron block aluminum head, .036 is as tight as we recommend. With an aluminum block you can run a few thousandths tighter due to the vertical growth. No cold starts in burnout boxes though because piston rock is a factor, so these numbers are based on common stroker pistons coming in at 1.110 to 1.120 c.h. that rock a bit more than a standard stroke 1.300+ c.h.
Last edited by Summitracing; 11-27-2018 at 02:22 PM.
11-27-2018, 02:44 PM
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Whoa! A 6-year old unanswered post goes viral! lol
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11-27-2018, 02:46 PM
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