gear_grinder

iTrader: (4)

hi, i just put on a 2500cfm electric fan and i was driving home tonight and the car seemd to run hotter then normal. the ambent out side temp was fairly cool to the touch and i could tell because of how much better the boost response was then during the day (87 TII). is 2500cfm enough to cool the rotary?

DarkKnightFC

If the car was running warm while you were moving then you need to look for something else. Do you have it hooked up to a thermostat switch? Cause if not then the fan could actually be blocking air if its on while the car is going.

gear_grinder

iTrader: (4)

i have it hooked up so that it comes on when the key is on, so it shouldnt be blocking air flow it should be moving air all the time.

ericgrau

iTrader: (1)

2500cfm was enough to cool my last N/A. Even then it was noticeably weaker than the stock fan and I ran a little warmer than usual. Maybe it's worse on a TII but then again you don't boost at idle, do you?

The fan is only for when your car is stopped. If your car is hotter than before at a stop (and only at a stop), then your fan is probably to blame. If it runs hotter on the freeway, then it's something else. At speed the air going across your radiator is far, far more than what a fan puts out.

gear_grinder

iTrader: (4)

it seemed to run normal at idle when we tested it, i'm gonna remove the AC condecer any who, so that should remove some restriction to the rad. and it was only when i was coming home it got alil hotter then normal. it usualy reads (stock temp gauge) about 1/3 the way off the C, when i came home it read about 1/2 the way off the C. so idk whats really going on, just that i recently changed the fan and i wonderd if that could be it.

ericgrau

iTrader: (1)

Meh, could just be hot weather then. The thermostat should hold the temp at about 1/4 or a little under 1/4. 1/3 is fine, but it means your t-stat is open all the time (hopefully) and your cooling system capacity is determining your temperature. So anything could bump up your temps a few degrees. Like, maybe it's a few degrees warmer outside. OTOH the bump in temp could be a bad t-stat getting worse. I'd get an OEM t-stat regardless, unless you're certain you have one already.

gear_grinder

iTrader: (4)

yeah, i should prolly replace the t-stat w/ the car being 20yrs old and all. i'll give it a try when i have time.

platinumyama32

DarkKnightFC,

sucks about your sig man.
jus thought id show some sympathy,
lots of a-holes out nowadays...

ericgrau

iTrader: (1)

Ok, make sure it's OEM (from Mazda; from a dealer for example). Other t-stats can cause problems, that's why I mentioned it. Even when new they can make your temps slightly hotter. Then they get worse.

Evil Aviator

... which is why the fan should be run from a thermostat. Starting at about 30mph vehicle speeds the fan begins to become a restriction if it is running.

NZConvertible

Actually when the car reaches a speed where air is being pushed thrpugh the radiator faster than the fan can pull it though, a running fan does become a restriction.

Why can't people install e-fans properly? This isn't rocket science...

Digi7ech

iTrader: (1)

Ford Taurus fan FTW

DarkKnightFC

You can get a hayden thermostat switch from any local auto parts store and places like autozone or advance might have them in stock.

gear_grinder

iTrader: (4)

how hard and expensive is it to install a thermo switch? and i was also just thinking about installing a cabin switch and just switch it on when i'm in town.

NZConvertible

That's a truly terrible idea, and is actually worse than running it all the time. Sooner or later you will forget...

There are plenty of thermoswitch kits around, most of which insert a probe either between the radiator fins or into a radiator hose. Most autoparts shops and fan suppliers have them.

Another way is to use an adjustable voltage switch kit that uses the stock ECU thermosensor as it's input.

http://autospeed.drive.com.au/cms/A_2476/article.html

Digi7ech

iTrader: (1)

^ SPAL PWM fan controller..
It can be programmed to use any temp sensor so you can use the stock one or use some other one.

RotaMan99

Another thread?

Click the link below.

SpooledupRacing

I have a 3600 cfm fan I run it all the time (connected to the ign switch) and when I first put it all together I did not put the plastic shielding back in between the radiator and bumper.. the car got hot.. once I put that back in the car cooled down...

I would make sure u have that plastic air deflector in there as well as changing out yoru old thermostat and adding new coolant (I run 2 liters of water to 1 litre of coolant)


btw when I did mine I also pulled the radiator and cleaned it out and cleaned out the engine..

I then installed a new nippon stat (nippon is oem for mazda) and ELF Glacelf coolant .

Aaron Cake

iTrader: (1)

Installing an electric fan the proper way:

http://www.aaroncake.net/rx-7/efaninstall.htm

gear_grinder

iTrader: (4)

i suck w/ electrical diagrams, what do i need to hook up were?