heres some food for thought. mine is off a custom tune corty, and having the same ability as you heaps of ajustment, my car is tuned for around 340 rwkw. I have put on an unboltable muffler to keep the beast quiet on the street this required about 3 degrees of timing to be removed, when I put the big rear pipe back on it gets the timing put back in . its good when theres no premium around pull out 10 degrees make it 14%richer and still run 14psi..lol.. and using the fan settings I can keep it a bit cooler also.