boredassfok

i am currently running 9psi. im looking to turn up the boost to around 14-15psi. but i am unclear capabilities of the piggy back box that comes with my turbo kit.
my dyno guy tells me i'll be fine. i can also go with a chipped p72 with uberdata. but i dont know if its nessary. im getting mixed information. any suggestions will be helpfull.