you should run a few pounds less than the tires max pressure. Each tire is different, some need more presure to be inflated properly, some need less. What's written in the door jam was for stock tires :P Dosn't really matter what rims you have, it's the tire.
What jllphan said, inflate to about 2-4 PSI less than the tires max pressure for a fairly even treadwear (which translates to an even footprint) If you plan to drift or do anything that REALLY wears down the tires, make sure the PSI is 2-4 less than max, otherwise, your gonna have some odd treadwear
My tire shop loves me, I've gone through 3 entire sets in 9 months....
225/50 16" rims. Kuhmo exctasa, cause I'm broke now
(I like the sig, CiscoKid)