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Old 10-27-2007, 12:37 PM
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RippinRon, I agree with your static CR 9.43:1, but not your Dynamic numbers.

Heads shaved .030" = 4.2cc, 76cc - 4.2cc = 71.8cc ,

6.1cc valve cuts in pistons, .015" head gasket with 4.1" holes, 4.030" bore & 3.48" stroke, .025" deck height, 5.7" rods.

ABDC = 42* @ .050" lift + 15* = 57* (it really S/B + 21* , but to compensate for another error in the online calculator we should use + 15*)

I get a sea level DCR = 7.97:1 & 5,280' elevation DCR = 6.92:1

I have read that this lower DCR is "B/S" above 5K rpm?

Will this ping or knock on the best gas I can buy here in Colorado, 91 octane?

I've read that the Edelbrock Pro-Flo EFI should help with ping & knock?

I bought the David Vizard book How to Build Chevy small blocks on a budget. Good Book! Thanks F-BIRD'88. P.S. I'm having trouble finding the
lower control arm relocation brackets for my 72 Monte?

P 89, He gives these World Products SR Torquer heads his 5 Star award! "The head has excellent port velocity for a torquey engine in the 1,000 to 6,000-RPM range. The swirl developed was about eight to 10% better than the aluminum Corvette head described nearby."


Last edited by BUFFALOBILLPATRICK; 10-27-2007 at 01:15 PM.
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