928drvr86.5

I just replaced the radiator on my 86.5 with a C&R unit from 928 International, and while doing so i came to the conclusion that i no longer want to mask my slipping belt driven fan clutch problem with a lower temp thermostat. I really am not too fond of replacing the fluid in the clutch either, so with that said I have made the decision to go to an electric fan but I want a kit that is specifically designed for the 928. I would like to hear from other 85-86.5 owners that have either the 928 Motorsports electric fans or DR's electric fan setup for his TS kit.

DR, It seems that the 928 Motorsports fan is excited via temperature switch over relay, with the switch tapped inline with the upper radiator hose, is this also how your unit works? Also, is your twin fan setup currently available? The site says that current wait time is August?

928drvr86.5

nobody

Imo000

I posted about a possible, cheap, OEM setup that would work on a 928. The OEM dual fans/shroud found on the Ford Contour/Mercury Mystique V6s have the same dimensions as the 928 rad.

If I needed another electric fan setup, that's the way I would go.

Do a search on my name and you'll find the post (it was a few months ago).

928drvr86.5

Thanks

Shane

I went with the motorsports setup on both sides of the radiator. The spal fan plugs right into the condesor fan plug so no wiring changes needed, just plug and play. The main radiator fan setup works ok and mine stays on till the temp cools down after securing the engine. You can get around that with a relay. What you need to consider is what YOUR future plans are for your car.

Are you going to boost? If yes then which one? Then plan your fan changes around which fan setup works for the kit that you plan to install. HTH

Imo000

Here's what the ford fans look like.

928drvr86.5

What is the CFM on the Ford fans? Would the fan sticking up on the upper left intefere with the stock 928 air duct? on the driver's side?

marton

How does that work? I assume the lower temp thermostat allows water into the radiator at a lower temperature but without forced air cooling the water will soon get very hot in some circumstances like slow traffic ? When the water gets hot then it will turn on the existing electric fan independent of the thermostat type? If the existing electric fan is enough to keep things cool then everything is OK?

Whatever, changing the mechanical fan for twin electric fans sounds like a good idea anywaY; I assume they go on the back of the radiator so you need fans that suck, not blow?

Marton

928drvr86.5

Yes, the lower temp thermostat sends the coolant to the radiator earlier so the radiator is that much further ahead in doing it's job, i think you answered your own question here. Like you said, it works fine until you sit in bumper to bumper traffic at which point even a blocked open thermostat wouldn't do any good, and you need air forced over the radiator core to draw away the the heat. When testing cooling systems for our tractors at John Deere we always use a blocked open thermostat to get true baseline data of what a cooling package is capable of. My fan is so worthless right now i could reach out and stop it with a toothpick. A lower temp thermostat basically buys you a little time until you can get moving again.

928drvr86.5

"Rockford Illinois, the sewer with a zip code" LOL, i love coming in on business 20 from the west end.

928drvr86.5

I've seen worse; don't take a wrong turn in Nashville.

928drvr86.5

It's not enough. In my experience with my bad fan clutch.... the Aux./AC fan will only keep the coolant temps down in minimal stop and go traffic coupled with hi ambient temperature. For me gridlock traffic isn't much of a problem, we have like 15 cars in Iowa, so 99% of the time i am fine.

Last year when rolling into SITM with the Texas crew we got stuck behind a slow moving dumptruck at 10 MPH for about 10 minutes going up hill in the Blue Ridge Mountains. That is when my cooling problems rear their ugly head. The truck pulled off just as the red light came on the dash. Once things sped up again the temp was back to normal within a couple of minutes.

Imo000

I don't know the specs on this fan but they are big enough to keep the 928 cool. Also being an OEM it has a built in reliabilty and R&D.

I pulled the engine and trans on my Mystique a few months ago and that's when I realized thet the Ford fans would fit really well into the 928. It's dimensions make it an almost drop in unit and they are low profile.

You can buy them for next to nothing at any wrecking yard. Pick up one and give it a shot. If it doesn't work (but I think it will) you are only out a few $$$.

Richter12x2

I didn't go with the Mystique/Contour fans, but went with the Ford Taurus 3.8L fan instead. A lot of hotrodders and offroaders use them because the specs are so nice for the price. The estimates are something like 3,000 CFM per minute on low and near 4,000 CFM on high on the 16" S-blade fan.



Here's a picture where I was mocking it up to check clearances, because the '85 '86 cars have the burden of requiring the fan mount to be replaced since the throttle armature is bolted to the side of it, and I wasn't about to chop up that expensive looking piece just to fit in a $40 fan.



It turns out that a tab on the side interfered with one of the transmission lines, so I chopped it off with the cutoff tool real quick. Then mocked up again, and it cleared. Looking at it closer, it fits better if you even off one whole side (it's already done in the top picture above). Gives a nice clearance and everything well out of the way.



Top to bottom the fit is perfect, and I added a strip of aluminum and some bolts between the screw holes on top of the radiator to pick up the factory screwhole in the top of the fan, and it's rock solid. I still plan on capturing the bottom somehow, just for added insurance, but it actually fits nicely inside the lip on the bottom of the radiator. It does leave about 2 inches on the passenger side unshrouded, but that makes a nice place to put the temperature probe from the fan controller kit. (This picture didn't turn out too well)



The SPAL fans and expensive fan kits are probably fine, but when we got a pair to be used with the new aluminum radiator on the Mustang, they looked like toys to me, so we refit the stock fan, and have had no issues.

Right now I'm using the fan controller kit (Derale, it's inexpensive, but still seems quality) to turn on the low fan at 180 degrees, with the intent to run it alongside the electric fan already on the car. If it works well, I plan to remove the great big squirrel cage fan from the front, and wire the hi speed fan winding into that circuit. I've tested high and low fan speeds and low moves a LOT of air. On high, you could pull the rubber boot and panel off the blower motor and have air conditioning inside the car!

Iwanna928

Imo000 Thanks for the info. I read that post of yours and decided to do the mod. I am in New Mexico on vacation with my family and I will be doing the mod next week, after she gets painted!

I will post info on how the installation goes!

Thanks

Stephen