ok im going to put a pair of HKS CAM Shafts 264/264 with gears and a injein intercooler and a fuel pump after that im getting it touned. i wanted to know after all that could i bump up the boost and if so how much more im running it at 20psi with a hks evc and the rest of my mods are HKS down pipe with Ti exhaust and a Injein intake with hard pipe and a HKS SQ bov?????????

 

Well since you live in SoCal and you bask in the glory that is 91 oct, I wouldn't bump it up much, if any. You're going to run the risk of detonation! Maybe you could up it to 20.5, but you're asking for trouble if you're thinking about going higher than 21 psi without an alky/water injection kit to compensate for the crappy fuel.