[matrix22]

on the subject of tires, in my Autox and track experience i went wider is better idea. went 30 over from a 215 to a 245 and pretty good Potenza RE01 rubber. could not maintain tire pressures due to the larger contact patches. between autox runs i would gain 9 psi. 20 min track run gain 12-15 psi. i started at 30. before going home after a cool down i was down to 19 psi. the best thing i could have done was get the RIGHT size tire for the wheels and better compound. and / or forged light weight wheels. the wider wheels also made steering heavy feeling, spongy even with smaller sidewalls. the car would crab. the front wanted to go one way and the rear the other. the specified size will do just fine. don't try to chase a set up. i mean , you can, i would like to say invest in the best rubber you can afford. a change in compound or construction will be a day and night difference.