Well i finally got my car tuned yesterday. I pegged the maf at 5600rpm, my tuner said its because i have the maf sensor in a 3" pipe and if i put it in a 4" it should be alright. So foe now he set the rev limiter at 5600rpm. At 18 degrees timing, still a little rich, and at 9.5psi it made 515rwhp/505tq. Hp peaked at 5600rpm when the maf pegged. He told me after a retune and more timing and more boost from.being able to rev it higher it should be close to 600rwhp.