MPG's
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Senior User
Joined: Sep 2007
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From: Southern WV
MPG's
Anybody else running without the engine fan?
Here is the story:
Ever since I have owned my dually, it has not coasted well, knock it out of gear, except on steep hill, and it actually would slow a little. Always thought it may be due to sticky calipers, never checked. About a month ago, the brakes started making metal to metal sound, no warning. So after changing both calipers, rotors, new pads, pack bearings, it will now coast a little. Couple weeks ago, strange noise under hood ended up being bad water pump. No leakage, but could wiggle the fan. New water pump on and decided to try running without fan. Seemed like the motor spooled up quicker and more power. So I decided to check mpgs. 80% of my miles are interstate and I seldom change my route. Never over 60, change gears at 1500-1700 (boring) but noticable improvement. Before the brake job, 12.5 mpg, last two tanks, 16.7 &16.8.
Any body know how many hp's the fan robs? Looks like electric fans are in my future. Anybody done a diy electric fans from the junkyard?
Here is the story:
Ever since I have owned my dually, it has not coasted well, knock it out of gear, except on steep hill, and it actually would slow a little. Always thought it may be due to sticky calipers, never checked. About a month ago, the brakes started making metal to metal sound, no warning. So after changing both calipers, rotors, new pads, pack bearings, it will now coast a little. Couple weeks ago, strange noise under hood ended up being bad water pump. No leakage, but could wiggle the fan. New water pump on and decided to try running without fan. Seemed like the motor spooled up quicker and more power. So I decided to check mpgs. 80% of my miles are interstate and I seldom change my route. Never over 60, change gears at 1500-1700 (boring) but noticable improvement. Before the brake job, 12.5 mpg, last two tanks, 16.7 &16.8.
Any body know how many hp's the fan robs? Looks like electric fans are in my future. Anybody done a diy electric fans from the junkyard?
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Joined: Sep 2011
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fans
no info for you but id def also like to know if anybodys running electric fans..i have been thinking the same as you....i know in the offroad world alot of guys use ford taurus fans..ive seen custom electric fans for obs trucks but in excess of 500
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From: Southern WV
Not sure which made the most difference. Forgot to check after the brake job. If I had to guess, I'd say the fan made more difference. Seat of the pants, decent hp increase, hard to keep my foot out of the engine bay. I am definately doing an e fan, just would like to here what others are running. Dont really want to lay out 500 or more for aftermarket if I can build myself cheap. But I want a good, reliable unit also. If anyone did a diy, what did you use?
Hotshot
Joined: Jan 2012
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From: Southern West Virginia
Lead Driver
Joined: Oct 2010
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From: Columbus, Oh
From what I've seen, dragging brakes will effect mileage more than a fan.
The dually is always going to get worse mileage than a SRW.
The dually is always going to get worse mileage than a SRW.
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From: Southern WV
I have read some post also about the taurus fans. Seems like there was alot of debate as to wether it could supply enough cfm's or not. What I remember, someone had the rating of the factory engine mounted fan and there was a debate about if the efan could match it. The factory fan output is dependant on rpm and the e fan is constant, so I would thing the e fan would be as good or better. I dont tow alot anymore, so I think it will work ok for me. So far in the temps we have had over the past 2 weeks, my engine temps are the same as before I removed the fan.
I also thought that the brakes would make a bigger difference. But the fan seems like it affects the motor alot.
I never expect to get the same as srw trucks, just goes with the territory, but still want to improve mileage if possible.
I also thought that the brakes would make a bigger difference. But the fan seems like it affects the motor alot.
I never expect to get the same as srw trucks, just goes with the territory, but still want to improve mileage if possible.
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Hotshot
Joined: Jan 2012
Posts: 11,132
Likes: 3
From: Southern West Virginia
I have read some post also about the taurus fans. Seems like there was alot of debate as to wether it could supply enough cfm's or not. What I remember, someone had the rating of the factory engine mounted fan and there was a debate about if the efan could match it. The factory fan output is dependant on rpm and the e fan is constant, so I would thing the e fan would be as good or better. I dont tow alot anymore, so I think it will work ok for me. So far in the temps we have had over the past 2 weeks, my engine temps are the same as before I removed the fan.
I also thought that the brakes would make a bigger difference. But the fan seems like it affects the motor alot.
I never expect to get the same as srw trucks, just goes with the territory, but still want to improve mileage if possible.
I also thought that the brakes would make a bigger difference. But the fan seems like it affects the motor alot.
I never expect to get the same as srw trucks, just goes with the territory, but still want to improve mileage if possible.
Hotshot
Joined: Jan 2012
Posts: 11,132
Likes: 3
From: Southern West Virginia
This isn't the same one, but it gives you a good idea of what you may need
Junkyard Electric Fan - FordMuscle