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Old 06-20-2010, 05:53 PM
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454 compression?

Just looking for a rough guess as to the compression of this particular engine.
454 .030 overbore
wiesco protru flattops, piston head volume -2.40cc
felpro head gaskets .41 thickness
215 casting heads with 101cc chambers
Thats pretty much all i know in order to calculate compression, i was thinking this engine would be around 9:1, would this be pretty close? Oh also i forgot to mention the block was decked .010 and the compression height of the pistons is 1.395 because im using a 6.385 connecting rod, thanks.

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Old 06-20-2010, 06:22 PM
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Here is one; http://www.classicalpontiac.com/restoration/cr.html

There are others on the net.

BT
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Old 06-20-2010, 06:43 PM
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Cylinder- 943.05 cc's
Chamber- 101 cc's
Piston- 2.4 cc's
Gasket- 10 cc's
Piston deck height volume- 2.35 cc's (Stock block deck height is 9.800". Your block deck height after the 0.010" cut is 9.790". Your stack is 9.780". 9.790" less 9.780" = 0.010" piston deck height.) (.7854 x 4.28 x 4.28 x .01 x 16.387 = 2.35 cc's)

Total ingested 1058.8 cc's
Total squeezed 115.75
Divide and find 9.15:1 static compression ratio.
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Old 06-20-2010, 06:52 PM
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Thank you for your replys, so i sould be at about 9:1
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