I have a fan that can run in both directions, so my question is should push or pull air? The fan assemble will be mounted between the radiator and engine, I was thinking pull.
I take it that the radiator is near the front of the vehicle. If that is the case the fan should be set up to pull air through the radiator. Fans that pull air are more efficient than those that push air.
Mount the fan about 1 1/2" from the core on a shroud so the air is pulled through the whole radiator core not just the area covered by the fan. Even if the fan covers most of the radiator core.
Great on track then what I did was I found a couple of fans from where my dad used to build wrecks one being similar to the one in the pic less the shroud the other one I got almost covered the whole opening in my core support all I have to do is make a couple small brackets and to me it looks almost factory. Looks cool and cheap in cost.
As with most anything else in life, there is more to this than you see at the outset of it.
What do you mean exactly when you say you have a fan that can run in both directions? To do that, the blades would have to be flat, not have a curve to them. Are the blades flat with no curve? Is this an electric fan?
My first choice is a temperature sensor switch. I use an adjustable switch controller, but that is not necessary.
Second choice is run all the time but I don't like that because I find my electric fan seldom runs. The car usually runs cool enough that it doesn't reach the 195 degree turn-out temperature except in slow traffic in hot weather. I run a 180 degree thermostat in the cooling system
I would strongly discourage a switch that has to be manually turned on. You will forget it sometime and overheat.
Ok I messed up the fan will be I front of radiator not behind. So it will have to be a pusher and the reason I put it in front because it fit in my core support almost perfect looks good. On an earlier post I asked about wireing it up it has 3wires and I don't belive I want to put a thermostat in it ( at this time anyway). I just thought about it running all the time.
Running it all the time is a complete waste- just run a mechanical fan if this is your intent. Wiring in a temp switch costs about $20 and will take that continuous 1/2hp draw off your engine.
I understand more then you think...I was building cars before you was even born...LOL...It will work either way and that's up to them, what way they want to go...I just don't depend on a 20 dollar switch to tell my fan to come on... I see your the one that isn't letting go here..Try to have a good day..:mwink:
Ok can someone tell me how to test a sending unit that i have which is the one in my head now no numbers so can't tell if it's for a gauge or light. Is the one for the fan different from those?
Is it the stock one for your car? Usually you can tell by plug shape, though not always. I'd just buy a new one anyway that switches at the temp you want. The specs are out there for most oem switches. Don't forget to use a relay.
On at about 30 degrees over your thermostat rating and off about 10 degrees over it. The on can be lower but you want the off to be higher than your coolant thermostat
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