[guudasitgets]

The race car pump controller I believe is like a DC drive. For $276.00 it outa be. I think if I just use 2 ice cube relays one for high speed and one for low with a resistor I should be good to go. Problem I see is that on trying to copy the REAL controllers operation, I think it throttles down to an idle so some water is being moved at all times. Sombody made a very valid point when they brought up hot spots, most likely source would be from around the exhaust ports. Like I said ealier the guys that had them on race cars suggested a larger or add on expansion tank. I think I'll take the path of the wiper motor idea. Next week I'll put the engine heater in there and see what kind of room i have to mount a motor. Heck just for grins I could just try a plain old toggle switch just to see what I need.