Cr?

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Feb 26, 2008 | 08:05 PM

jow02327

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Cr?

ok i am needing to figure what my CR is going to be. iam running a forged rods and pistons 347 w/ Weisco -4cc Valve releifs and 59cc PRC 2.5 5.3's with .0040 cometic head gaskets. thanks

Feb 26, 2008 | 08:37 PM

Bill Bowling

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According to my spreadsheet you are around 11.8 but I am not sure with the vavle reliefs. 59cc comes out to 11.80. Someone with more experience should check my numbers.

Bill

Feb 26, 2008 | 09:15 PM

crashinaz

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I think the closest Wiseco makes off the shelf is -3.2cc... In which case, ASSUMING you still have the factory bore, use the 3.910 cometic AND have an ACTUAL deck height of 9.240 and use 6.125 rods... You'd be at 11.13:1... If you have the shorter rods, use a larger diameter headgasket, etc... The comp ratio will go down.

Last edited by crashinaz; Feb 26, 2008 at 09:21 PM.