My 1986 WS6 has the 305, TPI, Auto, Air, is stock, and came with a single electric fan. The car has 27K on the odometer. last year the car started to develop an overheating problem, that we noticed running in the mountains at 35 to 40 MPH. The car shown no signs of overheating on the highway. First, I replaced the original radiator with a 3 core copper/brass unit. Replaced the hoses, belts, t-stat, 195 high flow unit, and it helped a little. Running a 50:50 mix with Royal Purple, and it helped a little more, but still would overheat under slow mountain driving conditions. I bought a dual fan set-up, and swapped out the single fan unit. Modified the fan control, so that an aftermarket fan switch set at 200, activates both fans via a set of isolating relays. The OEM fan control is still connected, so it acts as a back-up system, and allows the A/C pressure switch to activate the fans also. So basicly, both fans are running if the A/C is on, or the engine temp is above 200. It is better, but still ran hot on mountain highways. I installed a switch to keep the torque converter unlocked unless the car is in OD. The overheating problem was fixed. The engine maintains 200 all the time under any operating conditions, never colder, never hotter. Now for the problem. With both fans running, the altenator has a hard time keeping up. The voltage stays around 12.5 to 13 with everything running. It has been checked, and is operating within specs. The other problem is that the A/C dose not cool well with the car at idle. Had it checked, and it is a lack of air flow over the condensor that is the problem. Once the car is moving, the A/C works as designed. All of the thirdgens that I have owned before had mechanical fans, all ran perfectly, and the A/C would chunk ice cubes out at idle. I know that a lot of you are interested in the HP gains that the electric fans provide, however I just want the car to function properly. I am thinking about doing a mechanical fan set-up, and it appears that it would not be difficult, except that the A/C lines are routed in front of the radiator, instead of accross the top of the radiator like the models that came with mecahanical fan set-ups.Has anyone done this conversion? How did it work out?

 

When I converted my truck to electric fans I put a pusher fan on my truck to force air over the condencer at idle and low speeds. It seems to work better than when it had a mechanical fan.
My truck 2 large batteries and has trouble keeping up the voltage but it only has a little 40 or 50 amp alt. If it had a 140amp alt like my car I don't think there would be any problems.

 

Since no one was inpressed with my idea to convert the electric fans to mechanical fans, may be I need to rethink this idea. My car originally came with the single fan, and does not have the wiring for the duel fan. I added a stock duel fan set-up, and have it controlled by an aftermarket temp switch, and also by the orignal fan circuit triggered by the ECM or the A/C unit. Each of the control circuits trigger low amp relays that triggers a high amp relay that controls the fans as one unit. Either both fans are running, or no fan is running. It accomplished my goal to keep the engine temp at or below 200 all the time, but the fans run a lot. My goal is to keep the car as stock as possible, however the stock altenator does not keep up very well with both fans running most of the time and the A/C on. Idling at a traffic light with the A/C and the lights on the volt meter sits on 8 volts. When the car is moving again, the voltage goes to 13. Turn off the A/C and the volt meter climbs to 18. Can anyone recommend an altenator that looks stock, fits the stock brackets, and will put out a lot of amps to keep up with the electrical load? I thought about adding a pusher fan to boost the air flow accross the condensor, so that the A/C will work well in town, but that just adds to the already overloaded altenator. Thanks for any ideas.

 

try putting on a relay so the fans don't draw to many volts and putting in a hire amp alt

 

I had a big temperature improvement when I made everything functional. All those Fake vents, side louver, and those small one's on the rear of the hood. Cut/grind/saw, just open them up! Only one problem! it takes some time to warm up in the colder weather. This create's a free flow of air, entering and leaving the engine bay, just like in air a airplane this keep's a air pocket from forming in the engine bay. ALSO! Make sure the air dam underneath the nose is not broken before doing that! It seem removing the fog lights help also.

Good Luck