05-25-2017, 01:09 PM

thefirebirdm@n thefirebirdm@n is offline

Ultimate Warrior

Join Date: Feb 2004

Location: San Antonio, Tx

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Compression Calculator

Anyone have an online compression calculator they TRUST? I am putting the same specs in at Wallace Racing and Butler Performance and getting two different results. Wallace Racing says 9.2:1 and Bulter says 8.5:1. Pretty big difference.

Here's the specs:

Bore: 4.16 (400 +.040)
Stroke: 3.75
Heads: 92cc
Valve Relief: +10ccs (Icon Pistons)
Gasket Thickness: .045 (crushed)
Deck Clearance: 0.00

__________________
Jimmy
www.firebirdgallery.com
2002 WS6 M6 Trans Am - original owner
1973 Trans Am 455/4-speed
1971 Formula 400/400
1969 GTO 400/400 - 3rd owner
1968 Firebird Convertible 350/200R4

POCI - AAC

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