1971 Oldsmobile 442 Increasing compression ratio

1971 OLDSMOBILE 442
7.5L • V8 • RWD • MANUAL
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OLDSW30
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I need advise on how to increase the compression ratio of the engine since it is lower than the 70s models.
Jul 8, 2015 at 1:10 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
shave the head will increase it by a few points or get different pistons.
Jul 8, 2015 at 3:03 PM
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MIKE H R
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To Beef it up some you can have the heads milled. that is take a little off the head increasing the compression. you want more have the cyclinder walls shaved, but go as little as possible Seen some with walls oversized to 60,over stock. ..you can get a set of domed pistons. that would increase cylinder pressure
Sep 8, 2015 at 7:06 PM
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