Thread: electric cooling fan

Any particular reason for looking at changing? A well sorted cooling system with shroud properly fitted should be doing the job. Having said that, there are plenty of threads discussing this. I believe the fans of a Falcon or similar from a wreckers is the way to go. Heaps cheaper than buying new ones off the net, and apparently some of those advertised are a bit crap...

On my 3.5 (which has just made way for a 3.9) I had the AC condenser fans wired so I could flick them on independent of the AC being used to assist the viscous if required. This extra air was handy in heavy traffic on hot days - it used to knock off a couple of degrees - and easier than fitting new ones...

Cheers - Gav

hi gav thanks for the reply,no there is no particular reason for doing

this ,it doesn't run hot ,i am just a tinkerer with too much time on my

hands ,sad isn't it. i think i have the two most boring cars in the world

1977 m/benz diesel ,1998 v8 discovery nothing ever goes wrong with

them.........regards

I have a 96 V8 with the serpentine belt.
Replaced the twin thermo fans as they had died and the air conditioner was not working unless the vehicle was moving.
These fans automatically turn on whenever the air con is on or if the coolant temperature increases too much. They are very noisy though when running.

Fans work very well as long as you use cooling fans and not A/C fans,I used to run my Tdi without the fan and it felt like it had another cylinder. Pat

Do a search for Falcon fans. I used them for a bit, but didn't like the extra electrical complication, though they'd be great in a cooler climate.

The important thing is to make sure the installation is to an OEM spec. Too much people bodge in undersized fans and make electric fans look bad.

- Must be large enough. Take one that was installed on a car that has more horsepower than what it is going onto.

- Mount it properly from the rad frame. Under no circumstances should anything touch the rad core.

- Seal the shroud to the rad so that all air is drawn through the core.

- Build a proper, watertight and well designed control system for it. I would suggest the DCControl variable speed or two speed controllers.

I wired up a falcon thermo fan pack for my mates range rover. Low speed both fans was used as soon as ignition came on, I used a Davies Craig thermo switch to trigger both fans on high speed if the temp got too high.

After these were fitted it ran at a nice temp under normal conditions and it never got hot even during heavy sand work in Perth summers.

Was a good conversion, well worth it.

I'm glad you mentioned that. That was in another thread here somewhere as well, about getting the fans and the controller from a Falcon wreck.

Usually, most people wire them up to be either on or off, not running on low all the time, but that wouldn't be a bad thing and it sounds like it worked well for you guys.

I couldn't get the Falcon controller and fans from a wreck, so I bought an EL fan from eBay, and a Tridon thermo switch, and a later V8 coolant outlet elbow with the tapped hole in it for the switch. It worked quite well. I also got some big relays for it as the common smaller ones are supposedly not up to switching the higher amps all the time.

By far the biggest problem I had was working out a really good way to mount the unit as a lot of driving up here is on corrugated dirt roads and so everything has to be rock solid. I never did figure out something that I was really happy with.