i am on a 14b right now and have all of the supporting mods. i am gonna try and see if i can set a record or somethin. on a stock sidemount i wouldn't push more than like 15 psi. i was on 20 an a stock six bolt, and it will definately detonate. that is why i blew my piston. with all supporting mods such as afc injectors pump and all other stuff, you can push about 18-20. and that is stretching it. at those boost levels with the efficiency of the turbo being so low, you might have to run meth or race gas. i have done my research, and that is just my .02