|
Author
|
Topic: Electric Fan Relay question?
|
thumpin cat
Gearhead Posts: 458
From: Santa Barbara, California
Registered: Mar 2002
|
posted 07-02-2003 05:22 AM
  
If i run an electric fan with a relay do i have to run a manual on/off switch for the fan?Do i have to have a thermal sensor for the fan?
please let me know thanks for everyones help.
IP: Logged |
Tbird
Gearhead Posts: 298
From: USA
Registered: May 2003
|
posted 07-02-2003 07:22 AM
Not sure about all the fan relay/switch kits but the Painless Fan Switch kit comes with a temperature 'switch' you screw into the water jacket of the intake manifold. At a preset temperature, the 'switch' grounds the negative side of the relay there by energizing it and sending 12volts to the fan(s). Once the temperature falls below a certain setting, it 'un-grounds' the relay turning the fans off. The temp at which it actuates is around 170*, probably around the same temp is turns off.And no, you don't need a seperate or master switch for the fans, but you do need to fuse the 12volts that is supplied to the fans via the relay. The Painless kit also comes with a circuit breaker but I still like to fuse the connection also. On edit.... No, you don't have to have a master switch, you can hook the fan(s) up to run all the time when you start the car. But, it is still advisable to use a relay and not the 12volts form the ignition switch to operate the fan(s) but a seperate fused source for the fan(s). The great thing about the relay and temperature 'switch', you don't forget to turn the fan(s) on or forget to shut off the fan(s) [This message has been edited by Tbird (edited 07-02-2003).]
IP: Logged |
N266fords
Gearhead Posts: 1404
From: Spokane ,WA USA
Registered: Apr 2003
|
posted 07-02-2003 01:01 PM
http://www.s-seriesforum.com/how-to-efan.html Here read this.Bruce
IP: Logged |
Fastymz
Moderator Posts: 18703
From: Reno Nv USA MEM#1240
Registered: Apr 2001
|
posted 07-02-2003 01:04 PM
I would use both temp switch and a manual over ride switch.
The manual switch comes in handy sitting in the stagging lanes.
------------------
SCOOP2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. https://mustangsandmore.com/ubb/Fastymz.html
[This message has been edited by Fastymz (edited 07-02-2003).]
IP: Logged |
Tbird
Gearhead Posts: 298
From: USA
Registered: May 2003
|
posted 07-02-2003 02:26 PM
Ron,The master switch would be beneficial if you were running an electric water pump also with the engine shut off in the staging lanes. Otherwise, in my humble opinion, with the engine running and turning the water pump via the crank pulley, you aren't going to cool it below the normal idling temperature with a master switch operating the fan(s).
IP: Logged |
Fastymz
Moderator Posts: 18703
From: Reno Nv USA MEM#1240
Registered: Apr 2001
|
posted 07-02-2003 02:42 PM
Your right about that,but I was more talking about running the fan with the motor off.It helps to cool the rad and also blows air past the carb and fuel lines too.------------------
SCOOP 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. https://mustangsandmore.com/ubb/Fastymz.html
IP: Logged |
Mustangsandmore Forums
