blu_gxl

hey i just bought an efan got it from a second gen mr-2. now i need info or a how to on how to install the sucker. if anyone has any info or help it would be appreciated.

thanks
james

blu_gxl

no one? bump

blu_gxl

arguh! i know someone's done this

Turbocharged

It kinda depends, I dunno how the MR-2 fan mounts or what size it is. but in my case I just used some mounts and mounted it through the fins of the radiator. Then all you have to do is get a thermostat that tells the fan at which temp to turn on. Then you wire up the power and ground(the thermostat goes in line of the power wire), and make sure the fan spins the correct way. Or you could just wire up an in dash switch and you can manually turn the fan on and off. Hope this helps a bit
-Nathan-

blu_gxl

ok great but can i use the stock thermo or do i need another one and if i need another one then do i need the housing to mount it. and it's a dual fan so i just wire both together then inline to the thermostat. thermo need to be mounted in the coolant stream right. damn i'm confused do you have a pic?

scathcart

Oh, I see your problem.
you need to plumb a aftermarket thermostat switch into your wiring, not a thermostat! Leave Mazda's thermostat in, and install a thermostat switch (a unit that opens a circuit when a desired temperature is reached) into the housing below the thermostat by drilling a hole into the housing, and tapping the hole and screwing in the thermostat switch. This switch is actually a temperature switch, by a better term.
The efan will draw a lot of amps, so it should be put on an automotive relay, not as described above.
The guy above is not talking about a thermostat, he's talking about a switch.
Sean
If you can wait until tomorrow, I can post a paint diagram for the wiring sometime in the evening (don't have photoshop on this computer, and couldn't size it down).
Sean

blu_gxl

ok, i see about the thermo switch so scratch the thermostat. now i need the wireing diagram cause i'm a little off on that. i tried to search got a bunch of stuff last time but now it's only got 2-3 days worth of posts?

james

blu_gxl

sorry bout the spelling

scathcart

ground the black wire on the fan.
Take a good thick power wire from the battery positive to an automotive relay, and then out of the relay to the fan power wire. Then hook up the a smaller wire to positive, run to your thermo switch, out your thermo switch and down to the relay.
Without power to the relay, the circuit is open. When the thermostat switch turns on, it sends power to the relay, which closes the circuit, and allows power to go from the battery to the fan directly. This makes sure the thermostat switch does not see too much current.
Sean

ASCII:

[battery +]
I-------------------thermostat switch
[fuse] I
I I
I I
[relay]--------------------l
I L____________
I I
[fan postive] [fan 2]
I I
I I
[ground]________l

blu_gxl

ok got it one more thing(am i getting on your nerves yet). the fan is a duel fan so i should run both fans seprately to power and thermo switch through 2 seprate auto relays right? and just split at the thermo switch

scathcart

nah. Run them together. it would only be beneficial if you ran them on to different temperatures, which would be an unnecessary PITA.
wire the both fan's power wires to the single relay.
why'd you chose an MR2 fan, btw?
Sean

not annoying, but I feel like a post *****. posting every five mins, but I am answering his q's!!!!


I CHANGED the ASCII diagram for your needs, so look again.

blu_gxl

that was the whole thing about this to be a post ***** did you notice that you can't post but every thirty seconds now! anyway i got it because i wanted a fiero fan and the pick n pull did not have any so i thought well mid engine needs better cooling that front engine rotary needs better cooling that most any engine figured it would be about right and fiero fan is 10" this one is 2 6" so 12" basicaly and the 1 reason it was electric and my eclipse fans wouldn't fit! lol

james

blu_gxl

hey, thanks to scathcart!!! dude the wireing was easy the thermo switch had it's own but, it works realy well it's staying at the right temp. and a lot more room to work in, oh and no more lost bolts in the damn thing. also thanks to reted for the replys. and everyone who contributes. you all rock

james

TRUDSL

dude.. just wire the damn thing to your ignition...

NZConvertible

Good one, way to start a fire...
Any electric fan should be run via a relay direct from the battery with a fuse in the fist six inches of wire. Always do this with anything wired from the battery.

TRUDSL

how is that? you will have a fuse in between the ignition and the fan anyways. the relay will provide a 12V source as well as the ignition. I dont understand your point on how it will start a fire...

SO HOW ARE YOU GONNA START A FIRE??? i dont think there is fire running through the wires.. maybe electrons but not fire.

please show me where the fire pops up?

TRUDSL

use a relay and and source comes from battery and on/off comes from ignition. i didnt mean wire it directly.

NZConvertible

If you don't know how electrical fires can start in cars, you probably shouldn't be wiring anything up!
Never wire aftermarket fans straight into your ignition. Fans draw a lot of current, and chances are whatever wire you select to run it will not be sized to handle the additional current. Running too much current through a wire makes it hot, this is a fire risk. Over time and many operations this heat may be enough to melt the insulation but not blow the fuse. You then risk a short circuit and you better believe that can cause a fire.
Battery > fuse > relay > fan. Always.

blu_gxl

i've already done all the wireing and it work great, just was thanking people for the help. and on the wireing you realy should wire to the battery since you need the fan to come on when the car is not on also the ignition is not on when the car is not on. and on the relay thing i don't know how close the fuse should be but mine is within 6 inches.

james

NZConvertible

You don't actually. Once the engine is off you're not generating any more heat, so it's not going to get any hotter. Besides, since the pump's not turning the water's not moving, so all your cooling is the water in the radiator in front of the fan. But you are draining your battery.

scathcart

Hooray for ignorance!
Why use different gauges of wire? Try running too much current through a tiny wire, what happens? Wire heats up, glows red hot, and the insulation catches on fire. Here, hook up a resistor to a voltage source, and slowly turn up the voltage. What happnes? Black smoke, and a burnt resistor.
The ignition system uses wires designed for the amount of current the ignition system draws, stock. With added bits of corrosion, the resistance goes up. You wanna add an additional 10 amps through those wires?
Also, you don't need a fan on in the car all the time. When it is warming up for one, or as NZ said, when the car is turned off. With a good rad, at highway speeds, the fan shouldn't be necessary.

Seriously, if you don't know anything about a topic, don't give advice on it.

James, glad to hear your fan is running well, and glad you got some good advice on wiring it.
Sean Cathcart