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Old 02-06-2004, 05:35 PM   #6
GSXMEN
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Join Date: Aug 2002
Location: Upstate, NY
Posts: 337
Quote:
Originally posted by bigjimzlll
with a .040 quench..figuring 11cc piston dish..with 64cc heads..the cr is 9.54-1 If you have flat tops with a .065 quench(.039 gasket+.025 piston down) and add 64cc heads the CR will be 9.66-1 if you add a shim gasket(.015) The cr will be 10.2-1
I'd say Jim's #'s look spot on!! The 'rule of thumb' I've heard for SBC's is 1.1 pts. difference when going either to or from 64cc - 76cc.
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