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Old 09-24-2011, 10:36 AM   #426
miguel.760ti
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Quote:
Originally Posted by will740turbo View Post
The wiring doesn't look too bad to me, but what about a fan shroud that will make use of the full radiator? Are we talking 960 radiator+shroud? If so, will it fit into a 90 740T?

What I'd love to find is a radiator switch that has 2 switches inside that close at different temps. It seems simpler than a fan controller.
Re-use the stock shroud, the 940/960 shroud is way too thick to fit pre-92 7/9 with the mechanical fan.

As for fan switches you can use a t-fitting and switch (make sure it's not the one rated at 115*c) from a saab 9000. Put it inline one of the rad hoses and wire that to the low speed side of the volvo relay. Then if your radiator has the switch for the baby pusher fan in front of the a/c compressor, disconnect that and hook your high speed side to that switch.
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Old 09-24-2011, 12:43 PM   #427
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Quote:
Originally Posted by miguel.760ti View Post
Re-use the stock shroud, the 940/960 shroud is way too thick to fit pre-92 7/9 with the mechanical fan.

As for fan switches you can use a t-fitting and switch (make sure it's not the one rated at 115*c) from a saab 9000. Put it inline one of the rad hoses and wire that to the low speed side of the volvo relay. Then if your radiator has the switch for the baby pusher fan in front of the a/c compressor, disconnect that and hook your high speed side to that switch.
The T-fitting would work, but I don't want to add in more things that may break - especially plastic things. I'm thinking more like this:

http://www.alibaba.com/product-gs/47...Switch_85.html

With that(in the right thread pitch and length), splice in a pigtail straight off the relay (and add a dash switch that switches that wire from the sensor to the switch) and who needs a fan controller?
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Old 09-25-2011, 10:50 AM   #428
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The saab t-fittings are metal and aren't likely to break unless if you get one that's corroded to ****.

Not many people use a fan controller, the 2 speed volvo relay covers most everyone's needs.
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Old 09-25-2011, 10:51 AM   #429
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The saab t-fittings are metal and aren't likely to break unless if you get one that's corroded to ****.

Not many people use a fan controller, the 2 speed volvo relay covers most everyone's needs.
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Old 09-27-2011, 09:20 AM   #430
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I've got my fan finished, finally, and it works a treat. I'm using the medium 960 rad (590x420 core), 940 e-fan and relay, and BMW 2-speed fan switch in a T fitting in the top hose.

The relay gets it's power direct from the battery via a 30A slow-blow fuse which sits in a spare fuse holder already on the + terminal. It doesn't run at all while driving, kicks in occasionally in traffic, and it usually cycles itself once after I shut the car off. If it really bothers me I might put the fan on ignition-switched power instead.



Fan


Relay


Switch
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Old 09-27-2011, 07:34 PM   #431
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Excellent, I shall be copying this set up for mine.
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Old 09-29-2011, 12:11 PM   #432
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Quote:
Originally Posted by wooble View Post
I've got my fan finished, finally, and it works a treat. I'm using the medium 960 rad (590x420 core), 940 e-fan and relay, and BMW 2-speed fan switch in a T fitting in the top hose.

The relay gets it's power direct from the battery via a 30A slow-blow fuse which sits in a spare fuse holder already on the + terminal. It doesn't run at all while driving, kicks in occasionally in traffic, and it usually cycles itself once after I shut the car off. If it really bothers me I might put the fan on ignition-switched power instead.



Fan


Relay



Switch
what is the the temp switch set on got mine in the lower hose sand love it. Also what type of copler ? Looks billet.
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Old 09-29-2011, 12:11 PM   #433
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Quote:
Originally Posted by wooble View Post
I've got my fan finished, finally, and it works a treat. I'm using the medium 960 rad (590x420 core), 940 e-fan and relay, and BMW 2-speed fan switch in a T fitting in the top hose.

The relay gets it's power direct from the battery via a 30A slow-blow fuse which sits in a spare fuse holder already on the + terminal. It doesn't run at all while driving, kicks in occasionally in traffic, and it usually cycles itself once after I shut the car off. If it really bothers me I might put the fan on ignition-switched power instead.



Fan


Relay



Switch
what is the the temp switch set on got mine in the lower hose sand love it. Also what type of coppler ? Looks billet.
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Old 10-02-2011, 01:25 AM   #434
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Quote:
Originally Posted by wooble View Post
I've got my fan finished, finally, and it works a treat. I'm using the medium 960 rad (590x420 core), 940 e-fan and relay, and BMW 2-speed fan switch in a T fitting in the top hose.

The relay gets it's power direct from the battery via a 30A slow-blow fuse which sits in a spare fuse holder already on the + terminal. It doesn't run at all while driving, kicks in occasionally in traffic, and it usually cycles itself once after I shut the car off. If it really bothers me I might put the fan on ignition-switched power instead.


Switch
very nice... where did you get the T fitting from?...

some quick research shows that switch to be pretty common in BMW's...

as per napa's info...
Coolant Fan Switch Temp Rating : No. 1 On At 194 Deg. F., No. 2 On At 207 Deg. F.
Coolant Fan Switch Thread Size : M14 x 1.5"

some cross reference on summit for it Beck/Arnley 143-2011520
looks like it was used in everything from the 318 all the way on up to the v12 750 and everything in between from '87-97...
http://www.summitracing.com/parts/BC...n/?prefilter=0

will def peek under a few bimmers next time i'm at the JY
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Old 10-02-2011, 07:42 PM   #435
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The T fitting I'm using is this one, there are probably plenty more makes available with M14x1.5 thread. The BMW switch is handy because there are plenty in the yards and they're easy to get at (find it in the left rad end tank as you look into the bay), it's on most BMWs made in the 90s that have AC. The temp rating of the switch I'm using is Lo on at 90°C, Hi on at 95°C. There are a few different temp ratings of the BMW switch I think for different applications.

Last edited by wooble; 10-02-2011 at 07:53 PM..
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Old 10-24-2011, 05:26 PM   #436
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Hey Wooble- Nice to see you over here!

I have a V90 fan with shroud complete with relay wiring which I hope to fit to my 240 soon. This thread has been very useful!
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Old 01-06-2012, 08:54 AM   #437
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Quote:
Originally Posted by vvpete View Post
FYI some part numbers and equivalents for the temp switch, 22mm thread for the aftermarket 3 row radiator:

Vernet p/n ??? on 92 off 82
NAPA p/n FS150 on 87, off 82 C (198/188F)
FAE p/n 201-0809 on 87, off 82
Wahler VWW022209 on 87, off 82
-
I'm using the stock Bosch relay dirrectly from the battery, I don't use a fuse, and wonder why anybody would think they need one, as this power control relay is designed to be a fuse in itself, which is the way it was used in the 940.
Incidentally, the NAPA FS150 crosses over to an Autozone SW533. I've been running it for almost a week now and its working great.

Last edited by OKflyboy; 01-09-2012 at 02:33 PM..
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Old 01-08-2012, 12:23 AM   #438
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This 22mm thread is the same found int he nissen radiator no? Upper end tank on passenger side?
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Old 01-08-2012, 12:25 AM   #439
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Quote:
Originally Posted by Dakar09 View Post
This 22mm thread is the same found int he nissen radiator no? Upper end tank on passenger side?
Don't know about the nissen part, but the rest is right.
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Old 01-08-2012, 09:23 AM   #440
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Quote:
Originally Posted by wooble
The T fitting I'm using is >this one<, there are probably plenty more makes available with M14x1.5 thread.
Switch
Very good find wooble! I was searching a lot, but almost all T pieces has 1/8 NPT thread. So in the end I bought one of these and redrilled/rethreaded the sensor hole.
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Old 01-21-2012, 03:25 AM   #441
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I'm running the late Volvo 940 dual-speed fan, low speed is at 92c right now (just ordered an 82c switch because 92 is too high), high side is currently unwired but is going to get put on a hard switch in the cockpit.

In the OP, Dave Barton mentions an adjustable temperature switch -- anybody else have any experience or suggestions for this? I would love to be able to fine tune my temperature range rather than spending $25 on a Saab-style switch whenever I want to change the range. Being able to adjust it to match my thermostat and everything would be nice, plus I'm a bit of a control freak.
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Old 01-22-2012, 04:46 PM   #442
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anyone familiar with the e-fan from a 99 s-80? just pulled one today and it has a purple wire i am not sure if it gets a voltage signal or some sort of ground.
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Old 01-23-2012, 01:38 AM   #443
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How have the results been with the 3 prong switch listed above (Coolant Fan Switch Temp Rating : No. 1 On At 194 Deg. F., No. 2 On At 207 Deg. F. - Coolant Fan Switch Thread Size : M14 x 1.5")?

I'm planning on running that on a car with an 82* thermostat and really want to keep the install as clean as possible using one switch with that thread pitch.

edit: Holy moses, i found the mother of all 2 speed electric fan switch listings for EU cars...

http://www.adapart.eu/katalog/200.pdf

Last edited by Dakar09; 01-23-2012 at 02:45 PM..
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Old 02-17-2012, 04:22 PM   #444
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Questionni,

I have a full efan setup from a 940 ready to go in. Modified the shroud, mounted it, relay already wired, etc. Only wires I need to hook up now are the low speed, high speed, and power cable for the rig.

The switch I'm using is a Wahler 2 speed thermo switch from a Porsche 944, terminals marked 1 and 2, and the third terminal has none. Does this get grounded itself to the chassis or can it be left unplugged?

Thanks.
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Old 02-18-2012, 07:54 PM   #445
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3rd pin should be grounded. the 940 relay works by activating low/high speeds when the appropriate pin on the relay is grounded, in this case via the temperature switch.
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Old 03-10-2012, 02:24 AM   #446
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Quote:
Originally Posted by Xovaan View Post
Those pics are helpful!

So if I have that exact same setup right now, and am running my low speed to the temp sensor, how would I splice in a cabin-mounted switch that would activate the high speed fan?

Do I just take the high speed wire and put a switch on it then ground, like so?



Anybody wanna clarify this for me?

So assuming I rig up something like this as well, the high speed switch would trigger the fan whether the low speed temperature switch had been flipped or not, correct?
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Old 03-14-2012, 10:43 AM   #447
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That's the idea yes, and looks good on paper, one thing I noticed in my set-up is that if I trigger the high-speed when the fan is off- i.e. not going low-high but going from off-high, it CAN blow the 30a fuse because it spikes pretty hard kicking it on. Fix=bigger fuse? Or always make sure you are already running on slow before you trigger high speed.
If you are wiring high-speed to a cabin mounted switch, you might consider a 3-position switch, off-low-high so you can manually "warm-up" the fan for a sec before switching to high speed. Also gives more user-control.
EDIT: 5/08/2012 Fan works great, using a Saab T in the bottom hose with an 87/92 for the low speed, and haven't used the high speed yet

Here's some pics of the little 'fitment' issues I ran into when putting a 940 fan in a 240 (sorry it's dirty, but that's how I roll!)

Typical 940 E-fan on typical '86 240 DL radiator.



In order to cut it where I wanted to on the opposite side, I ended up notching out for the middle-return hose


Had to notch the bottom where the core of the radiator meets the end-caps, once on each bottom-corner. Then zip-ties and hay-wire FTW!

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Last edited by PDX240; 05-08-2012 at 05:10 PM.. Reason: Add pics/update
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Old 03-14-2012, 10:56 AM   #448
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If I use a 3-way switch, would I still be able to wire the low-speed up to the temp sensor for automated kick-on as well?
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Old 03-14-2012, 12:28 PM   #449
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Quote:
Originally Posted by PDX240 View Post
That's the idea yes, and looks good on paper, one thing I noticed in my set-up is that if I trigger the high-speed when the fan is off- i.e. not going low-high but going from off-high, it CAN blow the 30a fuse because it spikes pretty hard kicking it on. Fix=bigger fuse? Or always make sure you are already running on slow before you trigger high speed.
If you are wiring high-speed to a cabin mounted switch, you might consider a 3-position switch, off-low-high so you can manually "warm-up" the fan for a sec before switching to high speed. Also gives more user-control.
I use a Maxi-fuse. Works every time.
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Old 03-15-2012, 10:52 AM   #450
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Or you could just get a wahler 2 speed switch that fits in the radiator.
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