Read my sig for car details........ I have my stock 13" steel wheels with stock tires on for now since my MR7's are getting painted from silver to Gunmetal. Anyways, my question is: what is stock tire pressure for my car? How many Psi? And since I have a heavier engine (by about 80lbs or so), does that number change to accomodate? Thanks, and keep your stick on the ice.