91 4.9 Electric fan conversion?

I am considering replacing my clutdh fan (which is toast anyway) with some sort of electric fan. Is there an OEM swap that works? I must admit to just beginning the research. How do I tie in the thermostat to the fans etc. Any advice or links would be appreciated. /emoticons/[email protected] 2x" width="20" height="20" />

Lincoln mark VII

I'm using a Lincoln Mark VIII 4200 CFM fan on mine with an Imperial adjustable fan control plus a relay that has 100 amp full time rated contacts. I would also recommend that you upgrade your alternator to a 130 amp 3G to handle the additional load when the fan is running. With my cooling system, my fan only has to run about 5% or less of the time the engine is running, (almost never in the winter unless the truck is setting still for about 5 minutes, and on the hottest days in the summer with surface temperatures of 130+ f it runs when the truck is below 35 MPH). The Lincoln fan has a start current of

I got both of the above items from a local friendly junk yard. The Lincoln fan cost me $30.00 and the 3G $20.00, the Imperial fan control costs around $65.00 the relay, I believe, cost me around$30.00.

What I did was take two articles written up in Ford Muscle Magazine and combine them to come up with the system in my truck.

Good luck,

>-

Lincoln Mark VIII is indeed the correct one, the one that I meant. I had a small arguement with myself between the two but I just looked it up

why do you want to convert? a new fan clutch isnt much money and you dont have to worry about wiring or an alt upgrade The only reason i would use Efans if i didnt have the room for a mech setup(personally)

There is a performance gain to be had by running an electric fan. A mechanical clutch fan puts a drag on the motor and causes a minor power loss, that is why in the later trucks they upgraded to a viscous style fan clutch that only engages part of the time.

flex fans and viscous clutches put as little strain on the motor as possible. You dont turn an alternator for free either /emoticons/[email protected] 2x" width="20" height="20" />

The fact is that the only time an electric fan puts a drag on the engine is when it is running. If it is set up properly, you find that it runs less than 5% of the time the engine is running. Also at idle or very slow moving in hot weather, conditions that really require the cooling system to work most efficiently, a mechanical fan system is least efficient. However, a fan like the Lincoln Mark VIII is fully efficient and runs at full speed pulling 4200 CFM through the radiator fins.

The alternator upgrade is something most owners do or probably should consider for other reasons than supplying the load when it is required. It is common for people these days to add a lot of new stuff the truck didn't originally come with like high powered stereo systems, off road lighting, etc. If the alternator isn't able to supply the entire load, then the battery is drained. In a single battery system, (gas engine), the battery is designed to serve one function, starting the engine. From there on it is the purpose of the alternator to top off the battery and supply the full electrical load of the vehicle. If it doesn't, then the battery life is shortened.

Good luck,

>-

In the wiring diagrams it says to tap into the A/C clutch BLK/YEL wire. Where is this wire on a 96 5.8L?

havasuskaterboy said:

In the wiring diagrams it says to tap into the A/C clutch BLK/YEL wire. Where is this wire on a 96 5.8L?

Click to expand...

That is the wire going to the A/C clutch on the compressor.

>-

Sorry about the stupid questions. I just really hate wiring things.

What wire did you use for the "hot with ignition"?

Thanks.