What is considered a normal/typical/acceptable falloff for lap times over an 8 minute run? I'm wanting to dial in my setup. My fastest lap was 7.7 sec (small track) I was still able to pull off 8.1 sec in the last few laps. Motor came off at 154*f . Foam tires, not running a fan, 38* can timing and rollout of 102. If I drop a tooth, it'll put me at 100 RO.