I recall some people using the second higher temperature switch to turn on the second fan. Have one fan come on at 190, and the second come on at 210. That way you will lower the drain on your battery and still get max cooling when you need it. Also, where is your sensor mounted?
If the sensor is in the head, this would explain the 9 minute run time as it takes a really long time to cool down, and there is no water circulation when you are stopped unless you install an electric water pump too! If the tem sensor is on the radiator, then you will only have the fans running when they can do much of anything about the temperature. Brad Waller ([EMAIL PROTECTED]) '66 Corvette | 327/dead | 4-speed | Wilwood Brakes | 245/45/16 BFG R1 '67 Chevelle | ex-SS396 | 355/700R4 | F-Body Brakes | 275/40/17 Kumho MX > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Larry Williams > Sent: Wednesday, May 24, 2006 1:31 PM > To: Chevelle List > Subject: [Chevelle-list] BB Electric Fan Tenp Switch > > I have dual fans on my BB with a temp sensor in the alum head. The > sensor is set at 190 to activate. Currently at this time of year the > fans do not come on while the car is moving, but when I shut it off the > sensor will read a higher temp in the Alum head and start one fan and > run for about 9 min. I'm considering installing a higher temp sensor to > prevent the fan from running while the engine is off. Of course this > will effect running temps by making the fans come on at a higher temp. > How high of a temp would you guys allow the motor to get to before the > fan come on. I can run one or two fans manually if I chose > while driving > > Larry Williams.
