i have a os 18 tz and have ran 5 tanks the first tank i ran it off the ground but not much over idle and the rest of the tanks i ran on the track and the temps stay around 150, so how many tanks should i run before i lean it out, i have leaned the high end out a little so it would stay running. what do you guys suggest, also i realize now i should have ran the first tank on the ground but thats already done. i need the engine ready to race by the weekend.