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  #1  
Old 03-14-2013, 11:10 PM
nazareth nazareth is offline
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Post Clutch fan vs. E fan??

What are some pros and cons of switching to an E fan?

I had people say it'll do good and some say it'll do bad. What do you think?
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  #2  
Old 03-14-2013, 11:35 PM
Npinson Npinson is offline
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Subscribed. I'd like to see where this goes. Might be interested in converting too.
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  #3  
Old 03-15-2013, 07:55 AM
KZEE KZEE is offline
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Default Re: Clutch fan vs. E fan??

I put an e-fan on my '00 3.0 and have been happy with it... I've got a little more power, especially at throttle tip in, my mpg went up, and it's much quieter than the stock fan. I built an aluminum shroud for mine.

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Old 03-15-2013, 07:59 AM
pooleo pooleo is offline
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Default Re: Clutch fan vs. E fan??

I dont think there is much to be gained. I went from the clutch fan to a flex fan. (I had overheating problems with my plow). I love the thing. I did not notice any difference in mpg's or hp in either direction.

But the flex fan sure does move a shit ton more air!

Im also not a fan of depending on an electric motor to keep my engine cool....
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  #5  
Old 03-15-2013, 07:25 PM
KZEE KZEE is offline
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Default Re: Clutch fan vs. E fan??

An e-fan is not remotely the same thing as a flex fan, so it's nonsensical to compare the two.

The vast majority of the vehicles being manufactured today use some type of electric radiator fan and it's extremely rare to hear anyone complain of overheated engines. Many off-road racing trucks also use electric radiator fans without any problem, so it would seem nonsensical to be fearful that an e-fan on a Ranger won't keep it's engine cool.
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Old 03-15-2013, 07:41 PM
20Ranger06 20Ranger06 is offline
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Default Re: Clutch fan vs. E fan??

What you're doing is replacing rotating mass on the water pump which allows the engine to gain a few more HP not a lot.

You should have few problems with an eFan. The only issue is how to wire it up and the temp sensor location. You can google the topic and find a lot of information there.

Ford Taurus eFan would be the best solution since it has two speeds on one fan motor and finding them in a Recycled Parts yard is fairly easy and cheaper than buying a new one if your not sure of the change.
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Old 03-15-2013, 07:59 PM
06RangerXLT 06RangerXLT is offline
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Default Re: Clutch fan vs. E fan??

i love mine. never will i run mechanical again.
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  #8  
Old 12-08-2013, 09:25 AM
burky454 burky454 is offline
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Default Re: Clutch fan vs. E fan??

I love the picture and info posted by KZEE. I just bought a 2000 and was wondering about power gain and mpg. Nice job on the conversion. Have you got any numbers on the mpg gain?
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  #9  
Old 12-09-2013, 09:00 PM
rangerlocal rangerlocal is offline
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Default Re: Clutch fan vs. E fan??

Negligible difference. Mostly just quieter. Some people report gains, some report none. I think it's not worth doing if you're doing it for MPG gains alone; you'll be very disappointed with the results. I prefer mechanical myself.
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  #10  
Old 12-09-2013, 10:23 PM
Ranger01 Ranger01 is offline
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I have a couple Taurus e fans for sale if anyone is interested
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  #11  
Old 12-10-2013, 05:03 PM
bravebowhunter bravebowhunter is offline
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Quote:
Originally Posted by Ranger01 View Post
I have a couple Taurus e fans for sale if anyone is interested
What year are the fans from? Or a better question would be how big are the fans your selling? Single or dual? Do they come with a shroud? And wire harness?
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  #12  
Old 12-10-2013, 08:09 PM
markk53 markk53 is offline
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Default Re: Clutch fan vs. E fan??

I remember a previous thread on this...

Electric would be superior to any mechanical fan when it comes to performance. The electrical output of the alternator is plenty to take care of the load and that bit of extra load is less than the rotating mass and resistance caused by the mechanical fan set up. That means less horsepower to operate the engine leaving that little bit more to provide drive. The truck should get better performance, which may or may not be noticeable, and better mpg by a few mpg. And you have to figure the fan will run the proper speed for good cooling regardless of engine speed. A friend got 4-5 mpg gain when putting an electric fan on his 2.5 Chevy S10.

Clearly it would take some time for pay off, but it would eventually pay for itself. If there was a 3 mpg gain that would mean saving about a gallon of gas every 140 miles or so on a 21 mpg vehicle that would get 24 mpg. That would be worth about $3.50 every 140 miles. If you can do it for $70 it would take 2800 miles to pay out the cost with the savings.

As for reliability, virtually all liquid cooled road motorcycles use electric fans (only the early Honda CX500 used a mechanical fan to my knowledge). Probably 95% of all cars have since the 90s too.

I might consider that for a summer project myself.
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Last edited by markk53; 12-10-2013 at 08:15 PM.
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  #13  
Old 12-10-2013, 10:20 PM
Ranger01 Ranger01 is offline
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Quote:
Originally Posted by bravebowhunter View Post
What year are the fans from? Or a better question would be how big are the fans your selling? Single or dual? Do they come with a shroud? And wire harness?
They are from a 93 Their single they have a should and two of them have a pigtail. Two do not
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  #14  
Old 12-14-2013, 12:02 AM
rangerlocal rangerlocal is offline
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Default Re: Clutch fan vs. E fan??

Mark, get ready for some reading. Multiple people have shown no significant or proven mpg or power increase.

Proof of electric fan myth
Electric fan conversion using stock 3.0 shroud

Now putting an efan on a tiny GM 2.5 liter pulling a heavy truck, maybe you'd see a power increase. MPG's on our trucks? Not so much.
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  #15  
Old 12-14-2013, 09:53 AM
markk53 markk53 is offline
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Default Re: Clutch fan vs. E fan??

Quote:
Originally Posted by rangerlocal View Post
Mark, get ready for some reading. Multiple people have shown no significant or proven mpg or power increase.

Proof of electric fan myth
Electric fan conversion using stock 3.0 shroud

Now putting an efan on a tiny GM 2.5 liter pulling a heavy truck, maybe you'd see a power increase. MPG's on our trucks? Not so much.
Doesn't really change anything I mentioned now, did it?

As I said, seems all motorcycles and a bazillion import cars as well as domestic are running electric fans for any number of reasons.

Physics are physics, science is science, any added weight or drag on an engine takes power to spin up and hold at speed.

Will it make a noticeable difference? I don't know, depends on how you drive. The math involved is not simple, variables are numerous. Calculation for constant speed is only for constant speed. Most of the time a vehicle is in a state of acceleration or deceleration. In acceleration less rotating mass will accelerate with less power required. It would take some scientific testing on a dyno or a vehicle with some equipment to make factual measurements. It's kind of like the tail gate up/tail gate down/ tonneau cover testing that Consumer Reports did. There is scientific testing methodology to follow for accurate results.

On paper it may not look worth it. In application it may actually not be worth it for some. That is purely up to the owner to decide.

From that first thread it is old, but these are my thoughts on it:

It only takes 10-20 hp to maintain 60 mph, maintaining 2500 rpm, it takes less to run lower speeds at 2500 rpm, since drag increases exponentially it will take about 1/4 the power to maintain 30 mph at 2500 rpm. Even 1/8 or 1/50 hp might have value.

Then there is the fact that a pound or so per wheel can make a difference so why is it of no value on an engine? Rotating weight/drag is rotating weight/drag... especially when having to accelerate the rotating weight.

Seems there's a lot to reckon with mathematically. Still, the biggest factor is driver behavior - and you can't do the math for that.

Personally I will consider doing the conversion just because. Because if it does help a bit along the way, great. If not, it was an interesting experiment.

One undisputable advantage of an electric fan - it can provide maximum cooling even when the engine is idling or shut off for that matter. Some cars have the electric fan run until the car cools to a certain temperature whether the car is on or off. The electric fan on my Kawasaki KLX650 usually only comes on when moving extremely slow in hot conditions or on trails running pulling full air flow, no consideration for rpm. No mechancial fan can do that.
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1995 Kawasaki KLX650C big bore 678cc - lotta fun!
1990 Kawasaki ZR550 Zephyr - that old AMA Superbike look I love.
1978 Yamaha SR500 street-tracker with the emphasis on tracker (short tracker with lights).

Last edited by markk53; 12-14-2013 at 09:56 AM.
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