Electric Fans, a worthy upgrade? - Defender Source
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  #1  
Old April 16th, 2006, 11:37 PM
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Russell Newton
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Electric Fans, a worthy upgrade?

I've been thinking about replacing my standard fan with an electric one or a pair of electric ones,but are the benefits worth the cost and labor?
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  #2  
Old April 16th, 2006, 11:39 PM
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Hans Haase
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For me, it's been a fantastic upgrade. Gives me more room to work on the truck, slightly better gas mileage, and cost less than replacing the old burnt up viscous coupling.

-Hans
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  #3  
Old April 17th, 2006, 06:33 AM
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Ian McCormack
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I agree

I have to agree with the above and it makes for a much neater installation too
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  #4  
Old April 17th, 2006, 07:54 AM
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George Parthmer
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it def. helped with my overheating issues. however, i havent had them in during a 100+ degree day sitting in traffic in august yet ... but, still a worthy investment. def. cheaper than a new radiator. i remember hearing someone say that they got a new radiator at napa for just a few hundred bucks, that might be the next step!
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  #5  
Old April 17th, 2006, 08:50 AM
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Tyler
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Had them for maybe 8 months and had electrical failures after that point. They melted 2 fuses and a relay. So now I'm back to the stock set up with no complaints.
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  #6  
Old April 17th, 2006, 08:53 AM
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Quote:
Originally Posted by flippedrover
Had them for maybe 8 months and had electrical failures after that point. They melted 2 fuses and a relay. So now I'm back to the stock set up with no complaints.
Did you run a seperate fuse and relay for each fan or just one for the both of them?
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  #7  
Old April 17th, 2006, 08:56 AM
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One for both. Good sized ones too.
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Can't you feel 'em circlin' (closin'in) honey?
Can't you feel 'em swimmin' around?
You got fins to the left, fins to the right,
and you're the only bait in town.
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and you're the only girl in town.

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  #8  
Old April 17th, 2006, 09:10 AM
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Quote:
Originally Posted by flippedrover
One for both. Good sized ones too.
But you were runing those big goofy fans right?

And just for reference, I have been running my flexalites for over 2 years now without problem.
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  #9  
Old April 17th, 2006, 09:12 AM
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Yeah the be cools. I still ahve them and all the wiring is still in the truck just needs power.
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Can't you feel 'em swimmin' around?
You got fins to the left, fins to the right,
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  #10  
Old April 17th, 2006, 12:51 PM
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Living in Phoenix my 90 would run very hot. I would have to turn off the A/C at long lights so not to overheat. I swapped out to Flexlite 210's and never had a problem again. There is a pretty good writeup on how to Click Here . I used the bulb in the top hose instead of the switch deal.
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  #11  
Old April 17th, 2006, 07:03 PM
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Bryan Tate
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Can you use both?
Put an electric on the front as a push fan? vs. wiring as a pull fan??
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  #12  
Old April 17th, 2006, 07:57 PM
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for those of you that have made the "modification" did it have any effect on the AC and by what margin do you think your gas milage increased?
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  #13  
Old April 18th, 2006, 03:45 PM
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Silly question -- how would an electric fan improve your fuel economy?

The only thing I can think is that the standard fan adds a slight load to the engine. Perhaps I don't understand the physical forces involved but I can't imagine that the air flow would cause enough of a load to actually affect fuel econony.
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  #14  
Old April 18th, 2006, 03:59 PM
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Less rotating mass. But not much.
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  #15  
Old April 18th, 2006, 05:26 PM
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Less rotating mass, but the big reduction is in the air drag imparted on the engine. Not as bad when cold, but when the fan clamps down it does add up. I didn't get much milage difference, 1/4-1/2 mpg or so. But when you're only doing 12.5 on an average day, it does help.

-Hans
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  #16  
Old April 18th, 2006, 05:59 PM
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steve
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I put the 210's on the V8 and they have been great, they obviously suck more air under the hood than the viscious unit. Plus you can turn them off when wading.

Has anyone used flexilites on their 300tdi? I was thinking that the 2 of the 100 series would work but I'm looking for user experience.

Ne4x4 which are those in your photo?
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  #17  
Old April 18th, 2006, 06:33 PM
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Randy Black
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Do the 210's make more noise than the stock fan?
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  #18  
Old April 18th, 2006, 08:26 PM
javelinadave
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Quote:
Originally Posted by snuffer
Do the 210's make more noise than the stock fan?
A slight bit more noise but it is a different sound. This is a mod you do to keep your truck running cooler not a mod to gain M.P.G..................

For that you need to install the Tornado...........HaHaHaHaHaHa
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  #19  
Old April 18th, 2006, 10:54 PM
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Doug Walker
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Hate to rain on this parade, but I've gone back to engine-driven clutch fan. When the clutch is fully engaged, the engine fan pulls way, way more air than my 210 set up did.

I have an analog coolant temp gauge tapped right into my rad below the top hose, and when that clutch engages the temp drops like a stone 10 to 15 degrees within 30 to 45 seconds of engagement. Huge amount of air. (New clutch -- my old one that I'd replaced with the 210s turned out to be blown.)

Anyone have actual statistics on how much air the fully-engaged engine fan pulls?

Doug W.
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  #20  
Old April 18th, 2006, 11:04 PM
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No idea how much. But you are right though, engine driven fans do pull more air no matter what the electric companies say. Don't forget though, you're generating a bit more heat than the rest of us mere stock motor guys :-)

Every time this conversation comes up, I can't help but think about that oddball hydraulic motored fan on my Wife's old Lexus. Was driven off the power steering pump! Wierd.

-Hans
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