pusher / puller , fan switch / mounting etc

[singh336]

I haven't been able to find any clear advice on electric fan setup for the m50 swaps

I have a late model clutch fan on my m20 right now but ide rather not use it and go electric.



I see a lot of people using a SPAL pusher, does that go in front of the rad and push air through the rad towards the engine? Or am i getting the wrong idea from pusher/puller?


I would assume, if i am understanding what a pusher/puller fan is ... that a puller fan would be the right one to use because I am replacing my clutched fan completely ? wouldn't that have the most power?


Do you need both? I'm not running A/C btw



Or do some people just run a fan in front of the rad to save space behind it because there is not enough between the engine and rad?



And as far as wiring , why is there so many in depth diagrams and posts about wiring up the fan?


I forgot where I saw it, maybe akg or treehouse but someone makes a fan switch that plugs into the radiator for temp signal and closes after it reaches certain temp right?

So using switched constant power and this fan switch that comes on at 80C wouldn't that be the only wiring you needed to do ?


Thanks for all the help, if the information is already posted somewhere I apologize and links would be help !

[MaxBell]

I see a lot of people using a SPAL pusher, does that go in front of the rad and push air through the rad towards the engine? Or am i getting the wrong idea from pusher/puller?

A puller/pusher refers also to the location of a fan, one designed for the back that pulls air through (puller), or one on the front that pushes air through (pusher). The puller on the back of a rad, vs. a pusher on the front, will have higher CFM, but fitment may be an issue.


I would assume, if i am understanding what a pusher/puller fan is ... that a puller fan would be the right one to use because I am replacing my clutched fan completely ? wouldn't that have the most power?

That's correct. A puller fan on the back (engine side) of your rad.

Do you need both? I'm not running A/C btw

Nope.

Or do some people just run a fan in front of the rad to save space behind it because there is not enough between the engine and rad?

Most of the M/S5X swap guys do, since there is little room.

And as far as wiring , why is there so many in depth diagrams and posts about wiring up the fan?

Everyone comes up with their own way. I used a relay, rad temp switch so that mine auto trips on/off and the proper temp.

I forgot where I saw it, maybe akg or treehouse but someone makes a fan switch that plugs into the radiator for temp signal and closes after it reaches certain temp right?

This is easy and works well.


However, my question is where to get ignition power from! Maybe the radio?

[36brua]

http://www.r3vlimited.com/board/showthread.php?t=134232&page=4

http://www.r3vlimited.com/board/showpost.php?p=2504401&postcount=57

[eurosport22]

use the stock fan wiring from the aux fan. change the temp switch to the 82 deg and wire the high and low together so it always just runs fine. i have the spal 16 inch curved blade fan. its pretty quiet and moves a shit ton of air. i wired red and black to the red of the ran and the brown to the black wire of the fan. plugged in my new 82 deg switch and bam. auto fan and i can run it whenever i want by pushing the snowflake

[singh336]

thanks for all the help and explanations, I can definitely figure it out from here out

[328ijunkie]

I run the stock pusher w/ no clutch fan or puller on 75% of the swaps i do setup the way mentioned in my thread. If running AC you need a little more CFM to cool the motor AND the condenser than the stock fan can give you if you want the AC to work well.

[singh336]

I run the stock pusher w/ no clutch fan or puller on 75% of the swaps i do setup the way mentioned in my thread. If running AC you need a little more CFM to cool the motor AND the condenser than the stock fan can give you if you want the AC to work well.

So are you saying I can run the A/C condensor fan that came stock in the E30's ?

I'de rather just do that, I already scraped all my A/C stuff out of the E30 and saved the fan hoping I could mount that as a pusher on my radiator... instead of spending 100+ for a fan that's the same size...


If I can use this A/C aux fan that would be perfect !

[E30_pilot]

How are you guys mounting the stock a/c aux fan?

[325issguy]

Im assuming most are mounting the stock fan using the stock mounts lol.

[Adrian_Visser]

The aux. Fan provides minimal cooling, I used it for a while w/o a/c and in stop and go Traffic in 100F heat it can't quite keep up I had to turn my heater on frequently to keep the temp down.

I think there are mounts from the euro m3 or something that work to mount directly to the rad but it really isn't hard to mount it with a couple strips of metal. Stock mounts won't work because they mount it to the a/c condenser.

[325issguy]

Ahhh shit your right i totally forgot. The condensor was just left in place in my car as I am adding AC later and my car still stayed sufficiently cold. I am planning on upgrading with ac and the turbo though.

[Lithium]

I removed my AC condenser & mounted the stock fan right on the rad - used an 82 deg switch & th stock wiring high range - it cools itself in any tempature - I deleted the snowflake button & the car takes care of itself - Easy.