I have embarked on an electric fan conversion for my 95 F350. Using aluminum angle and light gauge sheet steel I built a shroud to which I have mounted the dual fans from a 1990's Taurus. After removing the stock fan assembly the new shroud & fans assembly has been mounted to the radiator. Having driven the truck this way for about a week I have found that seldom has there been a need for the fans to run. When I note an increase in engine temp I have manually engaged the fans and the temp drops almost immediately.

Investigation has shown several options for a controller: Flexalite, SPAL, DCC are on my short list. Soft start and incremental speed increase as well as automatic engagement when the AC compressor cycles are all features I would like to have. Could any of you who have had experience in this area provide some feedback?

Thanx,
dn.

 

donner, I know this is an old posting, but I am working on the same type setup for my 86 F350. I drew up a circuit using two diodes, three Bosch relays, one Ford AC pressure switch and a couple of Summit temperature switches. I am going to be using a 2000 Crown Victoria fan. This is a large two speed unit that is for a radiator core that matches a 1980-1996/7 F series radiator. I have started the modifications to the shroud to fit the truck mounting system using some creative trimming and aluminum angle. My setup should bring the fan on low if: engine temp > 200 degrees or AC clutch circuit on. It will go to high if: engine temp > 225 or AC high pressure > Ford's cut in point. In addition the AC pressure switch will kill the compressor if the pressure goes too high. Sorry, no slow tip in with this.

 

i have an on/off switch.

if i notice the temp is rising too fast or if the air is on, i push 'on'.

if not it is 'off'.

in a year i only had to turn it 'on' once.

 

I am glad to see that this thread is still drawing some interest. I have had my e-fan setup in operation for several months now. At first, I manually turned them on when needed; a few months back I got around to integrating wiring hookups to control the fan with a coolant sensor (which did require replacing the thermostat housing that had a threaded bung to mount the sensor) or A/C compressor cut-in. The controller I settled on was from Flexalite, mounting it to a fabricated bracket atop the aluminum & steel shroud I had built to mount the fans (dual Taurus set). I also removed my underhood fuseblock and modified it using an open fuse spot and an open relay spot making it all look virtually factory. This has been a good move, allowing more efficient AC operation while taking the load of the fan & viscous clutch off of the water pump bearings. Mileage & performance improvements have been marginal at best, but in the positive direction nonetheless. Taken altogether, I would recommend this to any other FTE'ers. Perhaps I will take some pictures and attempt to upload them.

dn.