I would wait to break your car in, at least 1500 miles before I started racing. Next if you have got 1500 miles and your car is stock, you will be in G-stock you should be very competitive I would run your rubber a bit over the 32 psi I have run high before but now chose to run about five pounds over is all, and 4-5 in the rear. Make sure your oil is full and give em hell!
One last thing if your car isnt broken in I would go watch, go early walk the course and get a ride with somebody, it will help out a lot.
