WIRING a/m radiator fans.

LITTLEMAGS

LITTLEMAGS

Club Member
Need advice on running after market fans. Due to space on my current project I have to dump the stock fan for a slim fit fans . ONE puller 16" fan and TWO 10" push fans to get to the cfm's I "think" i will be needing to keep the car cool. stock fan pushes 3200 cfm and new slim fit puller fan is rated at 2200 and two push 10" fans rated at 860 cfms each.
I would like to run a variable speed control module but most modules show I can only run TWO fans..not three...just need insight on how set this up? any advice welcomed...

gave a pic of 16" fan on my radiator and place where the push fans will be mounted on outside of radiator
 

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You might want to add a relay but other than that you should be able to run them off the same switch/controller
 
Since you are not going to wire them independently, both 10" push fans will operate on the same circuit, so in reality you only do have 2 fans.

--Joe
 
Run the variable on the two 10" pushers, and the 16 on a thermal switch on an as needed basis set at a certain temp?

I don't think adding a relay will help as the variable module handles the power output to the fans, and a third fan would most likely overload it and burn out the resisters. (guessing there's a relay before the module?)

Or put the varialbe on the 16, and one 10" thats offset to the 16, and the other 10" on a seperat thermal switch?

Have any links to the variable you are looking at, possible wire diagrams?
 
Billydroveit said:
Run the variable on the two 10" pushers, and the 16 on a thermal switch on an as needed basis set at a certain temp?

I don't think adding a relay will help as the variable module handles the power output to the fans, and a third fan would most likely overload it and burn out the resisters. (guessing there's a relay before the module?)

Or put the varialbe on the 16, and one 10" thats offset to the 16, and the other 10" on a seperat thermal switch?

Have any links to the variable you are looking at, possible wire diagrams?
Click to expand...
UNFORTUNATELY...no. I looked at this
http://www.jegs.com/InstallationInstructions/500/555/555-52126.pdf

and I dont even know if that will work right??
 
LITTLEMAGS said:
UNFORTUNATELY...no. I looked at this
http://www.jegs.com/InstallationInstructions/500/555/555-52126.pdf

and I dont even know if that will work right??
Click to expand...

That's just an on off controller (temp controlled) with A/C overide. Turns on the second fan at 12* higher than the first. You could add a relay and expand that controller to run all three, but they would be on/off operation only.

What i'm getting is you want something that spins the fans faster as the demand (temp) goes up?
 
Billydroveit said:
That's just an on off controller (temp controlled) with A/C overide. Turns on the second fan at 12* higher than the first. You could add a relay and expand that controller to run all three, but they would be on/off operation only.

What i'm getting is you want something that spins the fans faster as the demand (temp) goes up?
Click to expand...
i just dont want my car to overheat really...lol. I thought I could run the fans 16 inch and two 10 inch like the stock setup does in a sense. 16 comes on and if car get to 200 degrees the 10's come on...and stay on until car cools under 200 when I turn off the car...
Am I making sense?? Sometimes I talk jiberous...
 
LITTLEMAGS said:
i just dont want my car to overheat really...lol. I thought I could run the fans 16 inch and two 10 inch like the stock setup does in a sense. 16 comes on and if car get to 200 degrees the 10's come on...and stay on until car cools under 200 when I turn off the car...
Am I making sense?? Sometimes I talk jiberous...
Click to expand...

You might be able to, just need someone to do the wiring diagram.

I konw exactly where you're coming from, and get the trick set up you're trying to incorporate! But this may be a "reinventing the wheel" if the ECM will do it and you can piggy back all three fans to the controll circuit.

LITTLEMAGS said:
YES...it does.....i think that is REALLy my question...how do I wire the new fans to work
Click to expand...
Beyond my knowledge, ask Duke, or Sean at CARS
LITTLEMAGS said:
^^ i dont have AC btw...
Click to expand...

That wire just gets left empty, all, or most, of them will incorporate an A/C controll point.
 
IMO you are over complicating this. There should be no reason you can't only run one fan and put it on a switch/relay. I have never heard of someone needing three fans on a setup like yours.

And I would put it on a manual switch so that you can run it in the pits when the car is off to cool it down. If you just wire it up to the ECU then you do not have that option.

--Joe
 
soap said:
IMO you are over complicating this. There should be no reason you can't only run one fan and put it on a switch/relay. I have never heard of someone needing three fans on a setup like yours.

And I would put it on a manual switch so that you can run it in the pits when the car is off to cool it down. If you just wire it up to the ECU then you do not have that option.

--Joe
Click to expand...
joe,
Only thing I worry about is overheating...so this might be the best option.
 
How do you know you need 3920cfm of airflow across the radiator (2200 + 860 + 860)?? Have you done some calcs or something??

I do a lot of datalogging in my car and to be honest, my fan never even comes on while driving, even when it is hot out, and I have a crappy OEM radiator. The only time it comes on is if I get into stopped traffic. Certainly your aftermarket radiator can dissipate even more heat than an OEM unit.

--Joe
 
soap said:
How do you know you need 3920cfm of airflow across the radiator (2200 + 860 + 860)?? Have you done some calcs or something??

I do a lot of datalogging in my car and to be honest, my fan never even comes on while driving, even when it is hot out, and I have a crappy OEM radiator. The only time it comes on is if I get into stopped traffic. Certainly your aftermarket radiator can dissipate even more heat than an OEM unit.

--Joe
Click to expand...
To be honest...I was just being overly cautious. I know right now BEFORE everything is together I can add the fans...easy. after it is together it will be a pain to take in all apart. I dont even know IF i need that much but didnt really want to run super hot. I can go down to just one pull and one push fan to make it easier for wiring...just dont want to overheat. Like I said being overly cautious
 
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