Compression

RustyRatRod said
I also think Bewy's earlier assessment was correct. In that going from say 10:1 to 12:1 would have less of an effect on power than say going from 7.5 to 9.5 or 10:1. But I'm just saying that as a guess, since I don't have a dyno shoved in the corner of my shop.
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The biggest source for those numbers is DV. And if you read all of what he said, he says that is the MINIMUM you can expect by a certain increase in compression ratio.

Making a blanket statement like Bewy did is not what DV said at all.