Joe F

I am changing over to an electric fan in place of the belt driven one on my '83 Euro S. I have bought a 15" puller that appears to have enough power to do the job, but I am not clear on the best way to mount it. Does anyone have any photos of your install? I am trying to find a way to use the old shroud to get maximum area cooling and would really like to see some alternative ways that has been done. Any and all suggestions appreciated. Thanks in advance
Cheers.
JF

Joe F

anyone......???

DR

Hi Joe,

For the last decade or so I have always used a 16" modern electric fan in place of the original electric fan on all of my 77-86 928s. The one I use is a Hayden Rapid-Cool 16" with approx 2000cfm (there are many other brands that seem to fit also, but use 2000cfm or higher). It fits in place of the original older style fan and you can reuse the original mounting brackets (see photo) and plug it into the original fan connector using 2 female spade connectors on the fan wires. The Belt driven fan is totally removed (see 2nd photo) and makes maint. much easier. I have used this setup in all climates and is driven very hard in the steep mountains here and have never had heating issues. Very easy plug and play install taking less than an hour with no mods to the 928 and no additional wiring needed. I do suggest using a 75 degree fan switch so the fan comes on a little earlier when needed.

DR

Oh, forgot to mention I use damaged S4 fan shrouds and cut off the top portion for the airbox tube section on top of the radiator. You can also just use the upper part of your old pulley fan shroud for this purpose which is easily removed for maint.

Joe F

David,
Thanks for the response and the photos. Your solution looks like a very good way to go. Unfortunately, I bought a "puller" fan instead of a pusher. My idea was to leave the pusher on and just replace the belt driven fan with an electric one. I wish I had called you first. If someone else doesn't chime in here with a solution for the puller fan that's as elegant as your setup, I might be taking the one I have back and swapping for a pusher.

Cheers

JF

DR

Hi Joe,

I would also recommend swapping that one out for a 16" fan, reqardless just makes sure it is at least 2000cfm. You may want to take a look at Summit Racing, they have a ton of nice electric fans that will work, some of the 2000cfm + 16" fans there are as low as $99.

PorKen

Joe,

Depending on the brand, you can often convert the fan from puller to pusher, by flipping the blade, and switching the wires. Most Derales do this.

Joe F

Ken and David,
thanks for the feedback. I'm thinking I am making this too hard. The thing I was concerned about was not having an easy way to use the new fan with the old shroud, or have what ever new shroud I fabricate to cover the entire radiator. In looking at your setup Dave, you aren't covering the whole radiator either and appearently not having problems. Maybe I will try hooking up what I have and just keeping the upper part of the factory shroud. I would still have the pusher in front, if needed, and would be cooling most of the radiator with the new puller. I looked at the specs David and it is 15" but pulls 2800 cfm, so to go to a 16" would only gain 1/4 " per side. Do you think it's worth it?

Typing this with rubber gloves so I can get back into the grime more quickly.
So I can get to tjhe sooner too.
Cheers

DR

Hi Joe,

> I looked at the specs David and it is 15" but pulls 2800 cfm

As long as it is above 2000 CFM you are fine. I used the 16" because it fit perfectly where the old one was. Of course that will be different from manufacturer to manufacturer. Fitment and 2000cfm plus are the main criteria.

BrianG

I can't give specifics about the 928 swap YET because I haven't started the SuperModel instalation yet, but I can speak to this project as it applied to the 454-swap in my Jag VandenPlas.

First thing is that pullers far exceed the efficiency of pushers, for rad-cooling. The second thing is to understand that most of the electric fan units are designed (more or less) as a "ducted fan", which is also FAR more efficient than an open fan (propeller). Just look at how the original engine-driven fan fits in the shroud with the blades so close to the shroud.

This is going to take a bit of imagination but here goes.

The Jag application left very little room in front of the engine, for an engine driven fan, or anything else. I used a salvage fan shroud from a Marquis, which is quite shallow, and mounted it to the new Marquis rad which is what fit the Jag rad-housing space. The goal was to pull air through the rad so we mounted an electric (ducted) fan to the shroud. BUT, since there was not enough room between the shroud and the engine-front we mounted the fan "inside" the shroud, in pusher configuration. Can you see that the pusher was actually pulling air through the rad, but pushing it out of the shroud? To make the fan as efficient as possible we had to make a "reducer" disc because the fan's diameter was about 1" smaller than the shroud's exit, and a ducted fan has to be tightly shrouded.

At the end of the day, we had an efficient ducted fan, mounted inside the shroud, pulling air through the rad, but operating in pusher configuration.

It worked great!

Hope this makes sense, even if it doesn't help much!

byrdman454

Old thread resurection.

What is the thickest fan I can get to fit in front of the radiator as a pusher like DRs old setup?

I thought it was a touch above 3.0", but I was reading where someone fit 3.5". I do not have my cars here with me to measure. Can someone check this for me?

Thanks

j.kenzie@sbcglobal.net

DR, I'm interested in losing my belt driven fan. I understand that any 16", 2000 cfm pusher fan mounted in front of the AC condenser should provide adequate engine cooling. I see that Carl has an auxiliary fan replacement which fills that bill perfectly. You may have something as well.
This sounds like a good setup for a NA motor. Do you still feel comfortable with it?
On a related matter, what bad effects might happen if I eliminate my belt driven fan and leave the belt off the air injection pump?
Thanks for the ideas

Lizard928

I have a single 16" 3000 CFM Spal fan on the front of mine.

I loose alittle efficency as I havent dont up a full shroud yet, but it keep s the car cool unless I drive at the limit for a long time. And then it will hold around 95-100 deg and stay there.