Gettin my new 305-35-18 555R's put on monday, my first time actually buying a drag radial. What kind of psi are you guys running on the street for everyday driving vs the track? I was thinkin somewhere along the line of 28 psi (street) and like 20 psi at the track, does that sound about right? Hopefully I can cut some 1.7's with these because my "almost perfect" launches with the F1's only get me a 2.1 at best!