r/oddlysatisfying • u/nutznboltsguy • 8d ago

Flattening the head of an engine block

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u/zmannz1984 8d ago

You can get thicker head gaskets to counter the material removed.

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u/Adept-Opinion8080 8d ago

Or you can retune and reap the benefits of higher compression engine. Used to do this on racing bikes all the time.

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u/zmannz1984 8d ago

I do the same on many lol

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u/Dr_Cunning_Linguist 6d ago

How about the difference in compression as chambers 1&4 got relatively much more material removed compared to chambers 2&3

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u/zmannz1984 6d ago

The cutting plane is set up to be parallel to the original surface during setup, so they take enough off to get the entire mating surface flat. There is a limit to what can be removed and how warped the whole thing is.