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ill try to make this simple as possible. you need to know what you want to do with the motor before you build it. higher compression means more power w/ a n/a motor. lower compression for a boosted car is better do to the forced induction, more volume coming from the turbo. 8.5 to 1 would be rather sluggish w/o a turbo, but is ideal for boosting. either stay n/a and raise your compression or go boosted and lower your compression. high volume in a small cylinder means high compression. the same amount of volume in a bigger cylinder has lower compression. if you dont know what you want i wouldnt do anything until you do.
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