Hey guys ive been doing alot of research into the RB30DET build and i was chatting to my mate about it, who owns a honda integra dc5 type R. As he is planning to turbo it we go to talking about compression ratios, as i am planning to go with a 8.5:1 ratio i asked him what he was going to do. He reckons he can have a ratio of 10:1 and still run 25psi through a gt35r, at first i didnt belive him but then i did some research and found that the guys in the states are actually doing this on PUMP fuel (93 octane for them) and i was wondering how or am i missunder standing something?