Controlling electric fans

[blackmk3]

Well ive got two electric fans on my radiator one 12inch and one 14inch fan

At the moment im swiching the relay with a swich in the cabin but i really want a thermostat to bring them on. what do you guys do? and use for your cars?

I cant use the factory temp sensor as from factory the car had a viscus fan and two electric emergancy fans, so the temp sensor flicked on the two electiic fans at around 92 degrees so oviously to hot

Car in question is a 1989 supra running a 7mgte

Thanks
Nick

[Sideros]

I'm sure we'd do something at work - (Repco) I'll have a look tomorrow and get back to you. I know my flatmate has an adaptor that he put inline of his radiator hose which has a temp sensor on it... with the right degree sensor you could wire it up to turn fans on I guess? Dunno if there is anything easier.

[matt dunn]

I cant use the factory temp sensor as from factory the car had a viscus fan and two electric emergancy fans, so the temp sensor flicked on the two electiic fans at around 92 degrees so oviously to hot

Why too hot?

The fans should only be necessary when the car is runing and stationary for any length of time.

92 is about normal for radiator fans to switch on.
you dont want then on when the car is up to temp all the time,
you want it to come on after the thermostat is fully open constantly,
and the water is flowing around and around flat out.

[Ae92typeX]

As what Matt says above,
but, supercheap had something a while back. Jaycar sell a kit for a temp switch also.

[Dell'Orto]

What I'm planning on doing is just soldering another fan switch from another vehicle into the radiator tank, and using that to switch the fan. Go into Repco or whatever and have a looksee through the Tridon catalogue so see what switches at the right temp, then go to pick a part and flog one out of a car

[l1ttle_d3vil]

im just running a temperature controlled switch which connects to an earth at a certain temperature. when it switches / connects to earth, it turns a relay on which powers up the fan. you can get these switches for any temps you want.

[strx7]

on my car which I run Haltech EFI systems on I set the the fans to switch on at 91 or 92 and off again 88 or 89

[Stealer Of Souls]

im just running a temperature controlled switch which connects to an earth at a certain temperature. when it switches / connects to earth, it turns a relay on which powers up the fan. you can get these switches for any temps you want.

I do something similar. You could wire in a Jaycar Simple Voltage Switch to do the job too. This way you could connect it to your current temperature sensor.
Little bit fiddly, but probably well worth the effort.

[blackmk3]

I cant use the factory temp sensor as from factory the car had a viscus fan and two electric emergancy fans, so the temp sensor flicked on the two electiic fans at around 92 degrees so oviously to hot

Why too hot?

The fans should only be necessary when the car is runing and stationary for any length of time.

92 is about normal for radiator fans to switch on.
you dont want then on when the car is up to temp all the time,
you want it to come on after the thermostat is fully open constantly,
and the water is flowing around and around flat out.

I did think about this...i just thaught i would be a bit more conftable to run the 7M slightly overcooled with headgasket risk blah blah

I see that supercheap does a thermostat for electric fans, might be a good option, do people know if there reliable? just wondering about supercheap thats all


Stealer Of Souls - do you care to explain this Jaycar Simple Voltage Switch? sounds interesting

Thanks heaps
Nick

[Rick]

You could use something like this:

http://www.trademe.co.nz/Trade-Me-Motors/Car-parts-accessories/Performance/Radiators-cooling-systems/auction-118867199.htm

[Bling]

Is a relay required to run an electric fan?

I currently have my radiator fan running off a switch which is just hardwired in, no relay.....

[hsmidy]

what ever ya do make sure you run a relay circut other wise you could have a problem like my mate did, fan was drawing to much current and once the fan had enagaged it wouldnt turn off

[Adydas]

You could use something like this:

http://www.trademe.co.nz/Trade-Me-Motors/Car-parts-accessories/Performance/Radiators-cooling-systems/auction-118867199.htm

Must be good for DRIFTING to ay.. :p

[Stealer Of Souls]

Stealer Of Souls - do you care to explain this Jaycar Simple Voltage Switch? sounds interesting

http://www.autospeed.com/cms/A_2477/article.html
That link is to an article about using the Jaycar simple voltage switch to do a radiator fan.