electric fan and water pump controller

[L n L]

I use a DC Controls controller. One unit that controls both the fan and the pump, with variable speed.

When the motor is cold, they both run at about 10% speed. I have a temp probe that connects to a bolt on the thermostat housing that send a heat signal to the controller, and the controller has an adjustment that I use to control the "100% speed" point. I have mine set to keep the motor at about 180 during mild driving. The controller varies the speeds of the pump/fan in a nice linear method, elminating the voltage spikes you get with on/off type controllers.

I took the car on the Hot Rod Power Tour last June. We drove 4,405 miles altogether. With over 300# of tools, spare parts and luggage in the back, and track temperatures around 106 degrees, I ran an 11.7 @ 117. Driving for hours straight at 80-85mph (GPS verified) in temps over 100 degrees, the motor got close to 210 a few times, but never over.

I also have an over-ride switch for the controller, so that I can turn the pump/fan on while the motor is shut off. That allows me to bring the motor from over 200 to 160 or so in just 3 minutes or so.

Lee

[64mali]

Thanks guys, very good info.