Hi all. I'm just alittle tired of hearing other people tell me that clutch fans are better and more efficient than electric fans. On nearly every application I have seen the clutch fan puts way more drag on a belt drive that when a electric fan is turning on even at low speeds.
To prove this I took my stock ranger (2001 4.0 2wd) auto. First I drove it on the interstate cruise set at 70 mph and averaged 18.1 mpg over about 100 mile trip. Also took it to my local 1/8 track and ran a best e.t. of 10.64. The next weekend I changed to a electric fan I had laying around that came off of a ford escape, it is a two speed electric fan that I ran off of a toggle switch three position so I could use both speeds. I went and ran the same 100 mile trip at about the same temp off by less that 5 degrees and little to no wind. I averaged 18.9 mpg, so not a big difference. However when I took it back to the track I ran 10.10 at the same track. And the track condition where again identical and I had the same amount of fuel within a gallon or so. So as far as I am concerned electric fans are more efficient and take a significant amount of drag off of the belt drive. But to each his own I guess. Rant over.
To prove this I took my stock ranger (2001 4.0 2wd) auto. First I drove it on the interstate cruise set at 70 mph and averaged 18.1 mpg over about 100 mile trip. Also took it to my local 1/8 track and ran a best e.t. of 10.64. The next weekend I changed to a electric fan I had laying around that came off of a ford escape, it is a two speed electric fan that I ran off of a toggle switch three position so I could use both speeds. I went and ran the same 100 mile trip at about the same temp off by less that 5 degrees and little to no wind. I averaged 18.9 mpg, so not a big difference. However when I took it back to the track I ran 10.10 at the same track. And the track condition where again identical and I had the same amount of fuel within a gallon or so. So as far as I am concerned electric fans are more efficient and take a significant amount of drag off of the belt drive. But to each his own I guess. Rant over.