Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - I have stock Gen IV 454 & 781 Heads, Compression ????
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Old 11-27-2011, 07:39 AM
454C10 454C10 is offline
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930cc=cylinder volume
118cc= head
9cc=head gasket (0.040" thick)
4cc= piston below deck 0.015"
5cc= valve reliefs

(930 + 118 + 9 + 4 + 5) / (118 + 9 + 4 + 5)= (930 + 136) / (136) = 1066/136 = 7.83
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