Compression Help

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May 18, 2004 | 11:38 AM

#1

ScottJM

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Compression Help

OK heres my build
390 block +.030 Just cleaned up
Stock Crank and rods
Mildy Ported edelbrock RPM heads
RPM Manifold
Crane 349521
TRW L2291F Pistons
Felpro Head gaskets .041 Thick 4.400 bore

Can someone here with a little more knowledge on this subject help me out. Need to figure out the compression. Thanks in advance for any help.

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Old

May 18, 2004 | 11:43 AM

#2

rusty70f100

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From: Iowa

According to DD2k, you'll be sitting at 10.16:1 compression, figuring 3cc's for the valve pockets in the pistons and 72cc heads. I think it'll be just fine with that cam on pump gas.

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May 18, 2004 | 11:49 AM

#3

ScottJM

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How far down in the bore is the piston @TDC

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Old

May 18, 2004 | 04:43 PM

#4

Randyb12

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From: Eureka, Ca.

According to TRW, with the 72cc heads you will get 9.68:1 CR.

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