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Mod | | | Forums66 Topics128,037 Posts1,055,576 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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#34868 06/23/2002 3:25 AM | Joined: Dec 2001 Posts: 17 Junior Member | | Junior Member Joined: Dec 2001 Posts: 17 | Can anyone tell me how to figure compression ratio for a head after it has been milled. I have a 402ci. I am looking at boring the block 30 over and putting .180 domed pistons in it. Stock pistons were .100 dome. The stock compression for this motor is 8.5 to 1. How much would I have to mill the heads to get around 9.5 to 1 compression? Joe
Joe
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