I'm trying to determine what the compression ratio would be. I have the 2002 LQ9 6.0 H.O. Vortec engine.. It's 10.0:1 stock. The stock heads have 71.06cc chambers. The heads I'm going to put on it currently have 70cc chambers. I'm running a stock length LS1 pushrod which is 7.40".. What is the max I could have milled off and run a 7.35" pushrod? I would also like to determine the C/R at this point..

How much would I have to mill the 70cc chambered head to reach say 10.5:1, 10.8:1, 11.0:1..

Bore & stroke:
(in / mm) 4.00 x 3.62 / 101.6 x 92


Clearance volume at TDC

• Combustion chamber volume in cc
• Head gasket volume in cc
• Deck height volume in cc

Clearance volume at BDC

• Combustion chamber volume in cc
• Head gasket volume in cc
• Deck height volume in cc
• Cylinder volume in cc

Compression Ratio

(Clearance volume at TDC) / (Clearance volume at BDC) = CR

Thoughts?

 

http://www.prestage.com/carmath/calc_compression.asp