I just want to clarify that I dont have a clutch type fan, its a solid mount right to the water pump pulley.

The aux. fan in front of the AC radiator is something that I plan on hardwiring to a switch.

I remember at one point I put a thermometer in at the top of the radiator and watched as the temp climbed and compared what I read on the thermometer to what was on the gauge in the car. If I recall, they were pretty similar at that point. I think i may take out the sensor and heat it in a water bath w/a thermometer tonight to compare directly.

Thanks for the help guys!

Joel