Thread: compression/HP change calculation

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Thanks .I have found that being .026 farther down in the hole may not take but a few HP away and the .030 increase in bore should equal or better that.Especially if it adds around a quarter point comp. increase.Was just one of those things that had me bugged with curiosity.

There's something else you should take into consideration and that is that you are making the squish worse by placing the piston further from the bottom of the head surface at TDC. Increased squish = increased tendency to detonate. You may want to include a shave and a haircut on the block deck.