Originally Posted by EAMotorsports

Start with profile 7 on the SPX, timing about half way between 0 and full. Around a 4.75 FDR to start with. Run for 3 minutes and check temp. If very hot (170+) then pull car and let it cool off and drop a tooth. If motor is not very hot then finish run and check the temp. I try to get mine where they come off around 170 at teh end of a run with no fan on it. If you put a fan on the motor then you can run 1 tooth more as the fan is good for about 30F of temp drop.

Thanks
EA