Need some help with this. I am trying to make a maybe supercharger out of a variable speed motor, fan, and case. The problem is how to control the speed of the motor. Do I use an input from the MAP, TPS, or the tach. The motor has a controller to change the voltage for more or less speed. The motor has a range of 2000 to 20,000 RPM. I think this would be enough to produce at least a few pounds of boost. Any and all help would be greatly appreciated.