I have a lot of experience with modified rotarys. I can say without a shadow of a doubt that his tune is not what caught the bumper on fire. It is a common issue for any modified rotary, and some stock ones as well. Rotarys need a lot of fuel, and on decel, they dump a lot of fuel into an extremely hot exhaust.
As for Dan's tunes, I've only seen one tune from him that didn't seem to work 100% perfectly, and I've seen several from him, and that car has definitely been a basket case since before he improved it. He is an excellent tuner IMO.
