Quote:
Originally Posted by JLMounce
There's a lot of variables at play, but anywhere from 3-7% power increase for a full point of compression. The returns diminish though, so you wouldn't necessarily expect 10-20% for going from 7.5 to 10.5 for example.
However, you you achieve the the compression increase also matters. What if the head design gets more efficient through a modern head? What if the pistons are lighter, maybe coated, or have a thinner ring pack?
All of those things work in your favor. But if the compression was increased through something like milling of the head and no other changes were made, those small increases in power could be realistic.
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great info. Definitely NO plans in doing any bottom end work anytime soon.