if you do have a built bottom end ,you can run asmuch as you want ,BUT there is stuff you have to do like a msd box ,a fule system ,if you have na cams you will need cam gears to ajust for over lap,i see alot of people run a 125 shot on 11.1 ,i ran on 10.5-1 a 225 shot , so tell me how much you want to run and ill tell you about what your going to need,i.e. no mater how big of a shot you want to run because of your compresstion you will need a wet kit