72bluNblu said

Alright, next installment. Wiring hell.

I had a mechanical flex fan and the stock skinny fan belts on my 340 to start out with. I quickly found that no matter how I shimmed the pulley's or how tight I made the belt I would toss it whenever I really stabbed the throttle. Probably because of the stupid flex fan grabbing a tremendous amount of air. Not good! I was also having a hard time warming the car up and keeping it at temperature, the combination of flex fan, 26" aluminum radiator, and high flow water pump was actually cooling the car TOO well.

So, I bought a March serpentine conversion with alternator bracket, and upgraded to a 100amp Tuff Stuff alternator to handle the load from my new electric set up. Goldduster318 was kind enough to post up his conversion to dual electric fans using a set up from a Contour, so I did a little research and decided that was the way to go!

The fans come courtesy of a 1995-2000 Ford Contour. Dual electric fans, high and low speed, with a shroud that just about fit my 26" Champion radiator like it was made for it. To get it mounted I added a couple of 1/8" by 2" aluminum bar, and used the original mounting brackets on the fan.



I bought the fans new (Dorman 620-104), but hit the local PickNPull and picked up a spare set up that had the complete harness still attached. The entire set up is routed through a Dakota Digital controller, PAC-2750. It lets you program all the on/off temps, uses my autometer water temp gauge sending unit, and even allows me to program the fans to run after shut down for up to 5 minutes (and kills the fans if the battery gets low).

Dakota Digital Programmable Dual Fan Controllers PAC-2750

I did have to buy an extra relay for the dual fan set up Dakota Digital Relays with Wiring Sockets RLY-3

Followed by what I like to do LEAST, I wired this whole set up, along with finishing my battery cut off switch and relay to finally complete my battery to trunk relocation. I had been driving the car, just not with the cut off.

Anyway, the final product. Pulley's installed, no more belt throwing. Fan installed with 180* thermostat. No more flex fan, more horsepower, and shorter warm up times.






Special thanks to goldduster318, he made up an AWESOME pdf presentation about how to set up the whole fan installation and wiring. :thumbup:

And just as a bonus, the diagram I made up for my battery relocation, cut off, and relay...

Click to expand...