bigjoe619 Posted November 4, 2009 Report Share Posted November 4, 2009 i have a 12 in electric fan and its facing the radiator pointed outside the front of the car. should i have it suck air twar the motor or blow against the wind? Quote Link to comment
jovial_cynic Posted November 4, 2009 Report Share Posted November 4, 2009 My fan is on the outside side of the radiator and points inwards towards the engine bay. It works very well. It's opposite of what's going on with the stock 510 setup (inside the engine bay, blowing out), but I think it makes more sense to work with the air flow naturally occuring when the car is in motion instead of against it. What radiator do you have? You'll probably want a thermostatic switch to active the fan, since A) you don't always need it running, and B) you don't want to forget to turn it on if you're running a toggle switch. The rabbit radiator has a thermostatic switch built into it; I'm running my fan through that switch. Quote Link to comment
datsunaholic Posted November 4, 2009 Report Share Posted November 4, 2009 The stock 510 setup doesn't blow "out" it pulls in. I've never seen an automotive mechanical fan "blow out". You WANT the fan to pull air through the radiator from the front. Quote Link to comment
bigjoe619 Posted November 4, 2009 Author Report Share Posted November 4, 2009 thanks Quote Link to comment
motavated Posted November 4, 2009 Report Share Posted November 4, 2009 My fan is on the outside side of the radiator and points inwards towards the engine bay. It works very well. It's opposite of what's going on with the stock 510 setup (inside the engine bay, blowing out), but I think it makes more sense to work with the air flow naturally occuring when the car is in motion instead of against it. What radiator do you have? You'll probably want a thermostatic switch to active the fan, since A) you don't always need it running, and B) you don't want to forget to turn it on if you're running a toggle switch. The rabbit radiator has a thermostatic switch built into it; I'm running my fan through that switch. The stock electric fans from stock cars blow into the motor. So if your fan is inside blowing out. I think that is big no no. Well as long as it does not overheat I guess... See natural air rushes in the car when your driving to cool the rad. but if the fan is pusHing that air out... there is no air passing threw the rad... Harder to cool? Quote Link to comment
jovial_cynic Posted November 4, 2009 Report Share Posted November 4, 2009 no no - my fan is on the outside, blowing in - the same direction as the natural air. I was incorrect about the stock setup; I assumed incorrectly that it was blowing against the wind. If it's sucking air, that makes more sense, and my electric fan is blowing air in the same direction. Quote Link to comment
Unclejesse88 Posted November 5, 2009 Report Share Posted November 5, 2009 At work we've had a few focus cars come in with complaints of overheating while driving at speed. The diagnosis is always someone replacing the cooling fans with an aftermarket assembly. The cheap aftermarket fans are wired incorrectly, actually blowing air from inside the engine compartment outwards through the radiator. So you end up with decent cooling at idle, when the fan can blow air through the radiator, albeit backwards, and no cooling at speed when the fan is trying to blow air through the radiator against natural airflow. Quote Link to comment
VoidDragon Posted November 7, 2009 Report Share Posted November 7, 2009 THe Focus over heating problem is probably not fans, but fuel pumps. My sisters focus was doing that. Runnign too lean and causing the motor to overheat. I'd bet all those original fans are still good. Swipe them. Quote Link to comment
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