AU thermofan operation - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

xcgxl · 03-09-2005, 01:56

I have just tested my new AU thermofan set up and I must say, as I expected it seems to run a little hot, even in the cool of the night. You can really tell when they start up because the instrument light dim momentarily.

My question is, how long after the needle mooves off the centre of the gauge (normal 82 degress thermostat) do you guys set the fan to come on. I realise that most of you probably do not run an adjustable temp controller, but I have one, Davies Craig capilary tube type, I doesnt leak thankfully.

I am worried that if I set it too high the fans wont be able to pull the temperature back down again. At the moment I have it set so the fans come on as soon as the gauge starts to moove. I feel this will lead to excessive operation of the fans and they will be on most of the time. And remember I tested this in the cool of the night.

My other option is I have a high flow thermostat sitting on the shelf. Even though it is 82 degrees also the gauge never mooved much off cold with it installed and I was worried about damaging the motor from running it too cold.

My set up is Bosch 85 A Alternator (from a 4 cylinder Magna but without the nice belt adjuster) and an Odysey 600CCA sealed battery. I am hoping this will cope with the load of the two 120W (= 20A total) fans and the other small thermo I have on the air con condensor. have a good Adrad triple core radiator.

ch7472 · 03-09-2005, 17:29

I think you have some other problems than just the thermos. All i run is the standared 7 blade fan ( no extra noise) hiflow thermostat fan shroud and sit in traffic with no trobule at all ( the gauge sits 1/2 way at most). The block is 30 tho over and has 12.5-1 comp i have a small thermo just incase but so far this summer i have not had to use it. I must admite i dont have the air con or power steering either.

xcgxl · 03-09-2005, 18:16

No problems with the car at all. Works great with the standard 7 blader. Because it is spinning all the time the temp doesnt climb at all. The thermos only switch on when the motor starts to overheat and that is within about 10 seconds of becoming stationary. The thermos actually affect the idle quality because they suck so much power away from the electronic ignition. I put the thermos on because everyone says they are great.

ch7472 · 03-09-2005, 18:52

Now I understand.