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Message: <blockquote data-quote="shiroitenshi" data-source="post: 2052247" data-attributes="member: 27518">I wish it was that easy. Not too knowledgable on that specifically, but pistons with domes = more compression ratio (if you don't adjust anything else).. and as for the target compression ratio, depends on what kind of engine you're building. Too high a compression causes knocking with regular fuels and kills engines.Seems like the common formula is high compression + high duration cams = high rpm power (if your block can withstand post 9K rpm stresses.)As for forged pistons.. I think for the ultimate in reliability and strength.. those are the items to use. But I'm not a fan of forged pistons. I'm more of a cast pistons person, since they can run tighter clearances, which is a plus for a daily driven car, which don't see a lot of warm up prior to driving.. usually just start and go.Remember that some 'race-spec' items are simply that.. they are for racing purposes, and you'd be dealing with some form of negatives when using those kind of parts.. sure, you'd make better horsepower, but you'd be looking at higher maintainance as well.If you're an extremist, then go for it.. sky's the limit. Though for a B20B setup.. the bigger pistons you can use, the better.. but cost $$$$.. like for example, for the price of the Wiseco pistons, you can opt for 85/86mm ones instead, and get some power out of it, since you'd be REBORING the block anyway. Beware of too high a compression though, esp if you're using standard cams.. it might not happen to you, or it just MIGHT. Do note that some people say 86mm is reliable, and some say not. I believe the former, if you don't run crazy high compressions on it...</blockquote>

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