Diesel conversion - eliminating the fan clutch

[brherrmann]

I am planning to install a 6.5 diesel into a Jeep TJ Wrangler. I need all the front to back clearance I can get. Now if I were to eliminate the fan clutch all together and bolt the fan directly to the pulley (I need to add 1/2" spacer to clear the drive belt), I should be able to save about 1-1/2".
Prior to the 80's all fans were direct coupled. Does anyone know how this would impact fuel milage since I think this is why they were created in the first place? Any other possible implications? I plan on using a 21" Duramax fan.
Any help would be appreciated, Thanks.

[argo]

I think it will put a big dent in your mileage. Besides, as light as a wrangler is, and as potent as that fan is, you might be able to cruise down the highway in neutral and let the fan just pull you along. Given the light weight of the Wrangler, I'd suggest going with an electric fan setup. I know that's anathema around here, but I have had no heating issues whatsoever in my Suburban that I converted to diesel, including a torture test of climbing a grade in the Pocono mountains with the A/C on on a 90 degree day. If you've ever been to Jim Thorpe PA, you'll know the grade I am talking about; it winds around the side of the mountain on a steep climb for about 3 miles. My temperature never exceeded 180*. If you go that route try to find one of the GM "dustbuster" vans at the yard with the 3800 V6 and dual zone A/C. I mounted that monster right inside my fan shroud and it hasn't failed me yet. If it will keep my engine cool pulling my Sub's fat behind up a mountain with both A/C units blasting and a car full of people and kiddie stuff, your wrangler should be a walk in the park.