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

 

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

 

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.

 

k thanks guys its stock rod length and ive got the 3.910 cometics .0040 thick.