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Rev · 12-29-2005, 04:03 PM

When I ran 351W heads, 59.5 cc's, pistons down 0-.005" in the bore with 2.7cc valve reliefs and .049" compressed gasket we figured 9.5/1 CR. That's with 4.030" bore and a 302 crank. Hope that helps a little.

Rev

12-29-2005, 04:03 PM	#4
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Re: Compresstion Help When I ran 351W heads, 59.5 cc's, pistons down 0-.005" in the bore with 2.7cc valve reliefs and .049" compressed gasket we figured 9.5/1 CR. That's with 4.030" bore and a 302 crank. Hope that helps a little. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe