electric fan wired to tach terminal on dist?

[dyeager535]

Have you got it wired up so it's not on all the time? My EFI struggled to keep the engine running when it was "shocked" with the idle load of the fans coming on with the engine when my MAF failed and the fans come on as a limp home feature.

Totally defeats the purpose of electric fans to have them on all the time, you can see how much work the alternator is making the engine do just to turn the fans.

 

[blazerpro79]

Totally defeats the purpose of electric fans to have them on all the time, you can see how much work the alternator is making the engine do just to turn the fans.

i live in southern california where it is very hot. the old clutch fan wasnt doing the job, if it comes down to it, i will just buy a bigger alt. i want the fan always running

 

[BobK]

I know SoCal can get hot but a H/D 7 blade clutch fan and shroud should be able to handle those temps.
Are you running a hot motor,ex. BBC or a stroked SBC
If it's a stock 350 the stock H/D fan setup should be sufficient.

 

[blazerpro79]

its a mildly modified 350, i already have the fan in... the radiator was some after market one, so i cant find a shroud to fit it, and i dont like working on a truck with a huge fan spining 3"s from my fingers. i could have made a shroud, but i dont weld, so that makes things more difficult

 

[BobK]

Ah...I see.
Dorian does have a good point though.E-fans should not be running continuously.
Big drain on the electrical system and that fan won't last that long with continuous use.It will last a while,don't get me wrong but not as long as it would if used intermittantly.

I had a Temp cutoff switch threaded into the Pass. side head.It acts as a ground once it reaches a certain temp. grounding the relay circuit and turning on the fan.One the eng. is cooled enough the circuit is broken and the fan shuts off.
I believe mine is on at 185F and off at 170F but I need to switch it to the 200F on,185F off as with the temp switch I have now the fan is on too much.

This is the temp controll switch I installed.Look abot 3/4 down the page.It's called the FAN-THOM II ELECTRIC FAN RELAY WITH THERMOSTAT PROTECTION
http://www.painlesswiring.com/webcatalog/cat-relaykits.htm

 

[dyeager535]

i live in southern california where it is very hot. the old clutch fan wasnt doing the job, if it comes down to it, i will just buy a bigger alt. i want the fan always running

If you need the fan running all the time to keep a vehicle cool, you've got other problems that need solved.

No fan you can fit in there is going to move more air than air passing through the radiator at vehicle cruise speeds. It's pointless to have a fan on all the time, but do as you wish, it's your rig.