Originally Posted by
primetime
Fortunantly Honda was smart when designing their pistons, the p30 JDM b16b
(SIR II i believe) no milling will give you 11.9:1 compression with a oem 3 layer headgasket and 12.1:1 with a b series 2 layer headgasket. The 9500rpm can be 9000rpm, the rev limit would have to be moved up because of the change to the powerband.
both set-ups are fun reliable daily drivers one going some pep and the other is straight up power. it all depends on what you are trying to achieve.
b16b pistons are pct out of ctr motors. and those pistons are horribly designed. the high dome doesnt promote good flame travel and would put you at ~13:1cr in a b18c1. way too high for street use even with 93octane.