How do I make radiator fans start at a lower temp?

[ALarracuente]

Originally Posted by jhandy

the easiest thing to do is to wire in a switch that can be turned on from the cab. Do not disconnect the OEM wires, so that if you forget to turn it on, you wont overheat. Otherwise, the computer will have to be programed to turn on at a lower temp. I dont know if that is even a choice because the special porsche laptop and program to do that is around 3 K-6K$ and only dealers and large shops have it.

Thanks Jhandy, just what I was thinking. Now that you mention it, instead of a manual switch, I guess I could hook up a separate temperature sensor, (one that just has on/off signal) so when the desired temp is reached (say 180F) and a 50 amp relay to turn it on/of for me.

Any insights on brand/type of the switch or the temperature setting I should be selecting?

Anybody else (maybe at the tracks) have done this?

Thanks!
Fred