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Old 09-10-2024, 05:10 AM   #6
Tim Ayers
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Join Date: May 2010
Location: NJ
Posts: 7,233
Default Re: Offenhauser Heads 375/400/425

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Quote:
Originally Posted by Matt6494 View Post
Thanks! If I wanted to go to 275ci or 284ci in the future would the 400's still be ok, or would compression be too high?

You didn't mention the 376's, is that because compression is too high on aerc flathead?
As Drolston mentioned, those numbers are referring to the amount of can lift the heads will take. Meaning, 400 will accept a .400" lift cam, 425 will accept a .425" lift cam.

So if you have the stock cam in there, 375's would also work. If you plan to change to the cam to a different grind, you'll just need to be mindful of that.
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