a very good one!
what kinds of tune's are you refering to?
u want some pachabell's cannon? that's a good tune, reused by most rock bands.
dont just through an arbitrary amount of boost at it. you need to go to tuning shop, and slowly increase the boost untill the calculations of effective compression in the cylinder is where you feel safe. you need a good experienced tuner.
what turbo are you running? different size turbos move more air (CFM or LBs/Min) than others. 7psi on one turbo may be 270 CFM, but 360 CFM on another.