My FM 21 when I ran the Dyn 086 pipe ran 180-190 no matter where I ran it. I am not sure as far as how many turns in or out on the needles, I tune mine by feel on the track, and just check temps for a piece of mind I guess. As long as I get smoke coming out of corners and at end of longest straight, I am good with it. I did change this past weekend to the big boy pipe and had to lean the HSN 8 hours, but still came off after main at 192 degrees. This is in my Trinity Extech 2, I have the new Epic version sitting in my pit bag just screaming to go play I will say the big boy pipe WOKE THIS MOTOR UP big time, but I did loose fuel milage, which should not have happened, going to spend a little more time tuning and see if I can get milage back. I was getting around 10min a tank with the 86pipe.