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Message: <blockquote data-quote="shiroitenshi" data-source="post: 1953560" data-attributes="member: 27518">Nice compression info, those are dynamic compression ratios, aren't they?Thing is, with the B20B and B16/b18C head combo, the "Static" compression ratio varies according to how much volume the combustion chamber holds, and if you rework the head slightly to accomodate pistons or rework the pistons to clear the valves, then you'll have less compression, and probably have to build the engine to accomodate this to achieve desired compression.Cams also play a part in compression, but not static compression, they play with the timing of the valves closing to achieve desired "dynamic compression" compression.As you change your engine setup in terms of "static" compression, you can adapt by using cams... stock ones will work, but might not get you the powerband you desire.My thinking is that too high a static CR on VTEC engines, and you'll have problems with knocking pre-vtec, and run too low, and you don't get much power as the revs climbs..both which can be curbed with cams.. but customs cams are $$$$$$$$</blockquote>

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