i have domed pistons with an advertised compression ratio of 11.24, using heads with 64cc chambers.

the heads im running are 62cc and i was wondering how much it will raise my compression.

also, it says " compression ratios calculated with a .010 mill on the heads. my heads will not be milled at all so will this have any affect on compression or is it minuscule?

 

2cc should not raise it very much, id say a max of like 11.75:1. If the heads are milled it does make an impact on compression. So you might as well guess 11.5~ compression. Im sure someone else will give you some cool math to figure out the exact amount. But thats a rough guess.

 

There is a handy compression calculator link at the top of the Technical Discussion page under the thread entitled <Automotive Calculations on CamaroZ28.Com>.

 

Search google and there are plenty of calculators out there. The only one I use is Pat Kelly's so that I can get my DCR and SCR in one. There are a few more factors than what you have listed.