how to wire an electrical fan through a switch?

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  • asuj158
    replied
    Originally posted by nando
    your clutch fan isn't sapping any power with the car running. the whole idea is it only locks when the car gets hot (like idle), when you are moving at any significant speed the fan is free wheeling and not moving any air at all.

    the last track day I did it was about 95 degrees and my electric fan didn't come on ONCE. you don't need it for moving, you don't need it for fast driving, the only thing you really need it for is heavy traffic..
    good explanation

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  • nando
    replied
    Originally posted by 16v of E30
    The purpose of using an electrical fan is to take out the clutch pulley running off the motor, freeing up hp. whoopde doo your alternator might run a bit more amps but no big deal. I am considering it for my car as well. I live in a cold winter climate, so i dont need the fan at all. Summertime, when the track days are running hot, just leave the fan running in between runs...
    your clutch fan isn't sapping any power with the car running. the whole idea is it only locks when the car gets hot (like idle), when you are moving at any significant speed the fan is free wheeling and not moving any air at all.

    the last track day I did it was about 95 degrees and my electric fan didn't come on ONCE. you don't need it for moving, you don't need it for fast driving, the only thing you really need it for is heavy traffic..

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  • asuj158
    replied
    well i wired the fan through the switch and... TAAAA DAAAA it works. I like it the way it is. but down the road i might switch to thermal switch. Is the thermal switch the input on top of the thermostat housing?

    you can try and say im a dumbass... but at least im not the guy who put brake fluid in my motor then tried to clean it out with brake cleaner

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  • 16v of E30
    replied
    The purpose of using an electrical fan is to take out the clutch pulley running off the motor, freeing up hp. whoopde doo your alternator might run a bit more amps but no big deal. I am considering it for my car as well. I live in a cold winter climate, so i dont need the fan at all. Summertime, when the track days are running hot, just leave the fan running in between runs...

    Leave a comment:


  • nando
    replied
    Originally posted by asuj158
    nvm. you sure sound like a jerk. but im a jerk too sooo thats alright. but maybe ill wait until tomorrow and go get a thermal switch. will autozone have them?
    your car already has one

    you should maybe consider using a new clutch fan instead until you can do some reading and figure this all out..

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  • asuj158
    replied
    sorry in should know what the sarter/ignition switch is
    its been a long week of trying to get my motor and tranny back in the car

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  • asuj158
    replied
    and where does it go. when it come to electircal and thermal switches i have no idea what to do

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  • asuj158
    replied
    Originally posted by newman
    So you want to turn the fan on early so you can beat on a cold motor? I don't understand...

    If you want to have the fan turn on sooner, get a thermal switch that activates at a lower temperature.

    You sure sound like a moron, so have fun dealing with the dead battery when you keep leaving the switch on.



    What the fuck do you mean, what's the ignition switch??!?!?
    nvm. you sure sound like a jerk. but im a jerk too sooo thats alright. but maybe ill wait until tomorrow and go get a thermal switch. will autozone have them?

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  • whiltebeitel
    replied
    Could you just splice it into the auxilliary fan circuit? I know the AC button will turn the aux fan on whether or no the thermo switch is activated. This may have been already covered, though.

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  • nando
    replied
    Originally posted by jlevie
    There's a better way. For a standard 80C thermostat, install an 82-83C thermo switch in the radiator. Feed the relay coil with switched power and use the thermo switch and cabin switch to ground the relay coil. That way the fan will come on if either switch operates.

    When mounting the fan, don't use the simple "through the radiator" mounts. They will will in time wear a hole through one of the radiator fin tubes. I'll leave it as an exercise for the reader to figure out how I know that (and it was a new radiator!).
    what car came with an 82-83 thermoswitch? I only know of the 80/90 and 90/99.

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  • jlevie
    replied
    There's a better way. For a standard 80C thermostat, install an 82-83C thermo switch in the radiator. Feed the relay coil with switched power and use the thermo switch and cabin switch to ground the relay coil. That way the fan will come on if either switch operates.

    When mounting the fan, don't use the simple "through the radiator" mounts. They will will in time wear a hole through one of the radiator fin tubes. I'll leave it as an exercise for the reader to figure out how I know that (and it was a new radiator!).

    Leave a comment:


  • e30this
    replied
    Originally posted by newman
    You sure sound like a moron, so have fun dealing with the dead battery when you keep leaving the switch on.

    What the fuck do you mean, what's the ignition switch??!?!?

    Leave a comment:


  • dude8383
    replied
    Originally posted by nando
    if you are "driving hard" your engine isn't going to get hot enough to warrant the fan coming on in the first place. the only time it would need to come on would be idling in heavy traffic.
    x2

    before i wired up my fan to be on all the time i would have turn the heat on...it was alright during the cold months but man did it suck when it started to get warmer outside!

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  • nando
    replied
    if you are "driving hard" your engine isn't going to get hot enough to warrant the fan coming on in the first place. the only time it would need to come on would be idling in heavy traffic.

    Leave a comment:


  • SLUCK
    replied
    haha

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