Tofuball

I'm posting this in its own thread cuz a lot of people have been asking me about it, so here it is!

I removed my stock clutch fan and replaced it with the stock twin fans out of a first gen (MKI) Toyota MR2, and I did it for about $20.

The reasons I did this were simple. The most importaint reason I did this was that the stock clutch was dead, and a new one costs more then the MR2 fans (I obtained these from a friend for $20). I also like having all that room in the engine bay, making it easier to change belts and observe engine operating conditions. (Such as if the OMP is actually pumping oil and not air, or if your waterpump is dripping due to a failed bearing)

The dual MR2 fan shrouds are made of metal and fit almost perfectly with a little bending. As anyone who has ever owned an MKI MR2 knows, everything metal on the car rusts out, so I had to wire wheel and then paint these fans (I didnt do a very good job on the shrouds, IMO). Then I painted the (off white) fans black with some KRYLON PlastiCote (or something with a name similar, I'll get more info if anyone cares). I really like the way they came out.

I would reccomend grabbing the (very similar) twin fans out of a MKII MR2 if you can, because they are less likely to be rusted out, and look much nicer.

I put weather stripping along the edge of the fan and then layed it on my radiator. I cut a few lenths of coat hanger up and then bent them in to create the brackets to hold the fans in place. Then I bent the metal flat around where the coolant hoses are run (I dont like the idea of my soft rubber hoses touching a vibrating metal fan shroud)

I tested each fan for polarity and then set them to pull air through the radiator, then I ran the ground wire to the chasis right next to the fans. I used all 8 gauge wire. The positive wire went to a relay that is connected to the MegaSquirt.

I have the The MegaSquirt set to switch on the relay on whenever it sees the engine tempreture go OVER 200F (210F is the maximum acceptable operating tempreture) and switch it off around 184F.

When the fans come on, it's totally insane how fast they cool down the radiator. You can put your hand behind the airstream and FEEL the tempreture drop in the air coming off the radiator. The coolant sensor input to the MegaSquirt hesitates a little, (The waterpump has to circulate the cool water, then the sensor has to catch up) then the display shows the tempreture drops 20 degrees almost instantly!

These fans are much quieter then most of the Black Magic fans that I have heard. The fans do not over tax my stock S5 alternator.

This install is on a 90 N/A 'Vert with A/C.

Test fitting the fans:


Bending to clear the lower radiator hose:


You will have to bend it for the upper radiator hose too. Note the weather stripping in the second picture! Its importaint to add so that the fan doesnt scratch up your radiator!

FC3S_nataku

iTrader: (3)

so how would this work on a s4? what would turn on the fan because i dont have megasquirt.

Tofuball

You can pick up a tempreture switch for that

AutoSpeed goes over it a little: http://autospeed.drive.com.au/cms/A_2477/article.html

S4/S5, doesnt matter, radiator fitment is the same.

aka_rocket

^
i have an S4 too..and my clutch fan is out as well...and i don't have a megasquirt either?

classicauto

iTrader: (3)

a temp sender and a realy will operate the fan
or just a regular old switch....

thats a nice setup man - anyone say - WAYYYYYY cheaper than a flex-lite or t-fal.....t-fal better make out with me for that price - hehe

Tofuball

Thanks! Those other aftermarkets are also insanely loud! But I bet they pull a bit more CFM :p (Way more CFM then I'll ever need)

I'm going to post up a few more pictures in a bit, especially of the coathanger brackets :p

Digi7ech

iTrader: (1)

Can you find any info on the CFM for that thing?

from personal experience I will not put an e-fan on my car unless it can pull 3k cfm+

psychotic7

i got a efan off a chevy blazer, dont know the year though, for 10 bucks from a local junk yard and it fits perfect. it is a big *** single fan that covers almost the whole radiator. worth a look into guys, bc a junk yard has tons of blazers and will sell parts cheap bc it is a more common ride. my TII gets no more than a quarter of the way up on the temp gauge, it kicks ***.

Pele

iTrader: (28)

Most GM's share the same fan. It's a popular 1st gen mod as well... Most of us have the Ford Taurus (Late 80's/Early 90's bodystyle) or Pontiac Fiero (Almost all transverse engien GM's have this fan, as well as Camaros, and such... Like I said, most GM's share the exact same fan.

As far as the MR2 fans go, the MKII MR2 and MKI MR2 fans are the exact same machien, except the motors on the MKII are upgraded... If you have dead MKI fans, you can get rebuilt motors for the MKII and turn the old motors in for core.

Alex6969

Nice writeup! I'll be searching for it in a few weeks

whats the CFM on one of those things?

Tofuball

Haha, wish I knew. It's enough for my N/A though My N/A runs rather hot for an N/A because the timing is pretty advanced and I run around 16:1AFRs on cruise :p

Well, it used to run rather hot, with the stock clutch fan!