I installed an 18" electric fan in my L, and it does a great job for cooling, but when Im going down the highway there is no need for the fan to be running. So I want to installe a presure switch so when there is air moving the fan turns off, then turning back on when Im at a stop. What type of a sensor do I need to installe?

 

side point? did you get more hp? how much?

 

I did get more hp, but have not denoed it so cant say how much. The only disadvantage is the stoped at a light and if the fan is not running you dont have an AC, it just blows out hot air. It also added a new noise to it; talk about one load fan, but its an aggressive roar.

 

Why not set it up with a thermostat controled switch? This way the fan will run when engine is hot, not when normal. I have thought of buying one of these, wonder why the A/C cuts off.