Quote:
Originally Posted by ForcedInduction
No, you would have lower power and reduced efficiency because of the reduced squish area between the head and piston. If you want to lower the compression ratio you would have to machine out the bowl of the piston.
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My neighbor's buddies planed the head down on one of their gas engines to increase the compresson ratio. They got it up to around 11 to 1 (and no, they can't run normal gas in it anymore).
I'd think piston head changes and changing the distance between the head and block would be equivalant compressionwise. I find these littel nuances facinating, so if you have any pointers to further reading I can do to educate myself on why not, I'd really appreciate it.