Yeah but if you lower compression ratio too low you loose low and mid-range rpm power and for a daily car well don't know I am not always running my car at 5-7k rpm

and guys in your opinions, by saying that a too high compression ratio would need race fuel.. what CR would you use then just give me an idea

An RSX type S comes stock with 11.0:1 compression ratio and you can run a greddy turbo on it at 8 psi ( stock suggested boost) without any problem so I don't understand the fact that going 11.5:1 with forged pistons would be that bad (when used with the right valve springs and rods).. Maybe I'm wrong tell me what u think