Is this possible, and if so how would I proceed?

JamesC

 

http://www.jegs.com//cgi-bin/ncommer...35&prmenbr=361

Bought this 3 yrs ago when I switched over to the electric water pump/electric fans and life is soo easy. You can leave it in Automatic mode so when the temp gets to 160* the fans/pumps come on by themselves and they shut themselves off at 140*, then it has the manual override as well if you want to control it yourself.

For the bracket racer this is a no brainer since you can come into the pits, leave it on auto and the car automatically cools itself!!! For daily driven application you could use this to just power your fans if still running a mechanial water pump and again, it takes care of itself.

 

Other suggestions?

JamesC

 

the stock single fan circuit is insanely simple.


you have a thermal switch that grounds itself when coolent temp hits a specific temp. you can get cheap adjustible ones from NAPA, or the stock one from other cars.... they made them for temps ranging from 170 to 250+ so you can find whatever you want.




when this switch grounds, it grounds a relay.
the relay turns on the fan.


super simple.
reliable.
easy.

 

The single fan doesn't present a real problem as you mention. How about the second fan coming on with AC?

JamesC

 

do the exact same thing.

when the AC is turned on, it also grounds the AC clutch.

add it a ground wire to the relay so that when the AC clutch comes on, the relay grounds. and that makes the fan come on when the AC is on.