Electric cooling fan conversion
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Senior User
Joined: Dec 2009
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From: Cuyahoga Falls, OH
Electric cooling fan conversion
I'm going to try to make the switch to electric fans on my Expy. I picked up a dual fan setup off of a 2000ish Windstar at the local pull-a-part for $25. I am looking at the hayden 3651 kit for the install. My 2 questions about this kit are what amperage is the relay and what gauge is the wire that is included? Hayden Automotive 3651 - Hayden Electric Fan Controls - Overview - SummitRacing.com. I know this can be kind of a hot topic with some that think the clutch fan is the best way to go, but the e-fans are more efficient and free up space under the hood and can give a boost in the mpg's. Should I just stick with my tried and true clutch fan or am I asking for trouble with a little more complex set up with the e-fans? Any input is appreciated, Thanks
Fleet Owner
Joined: Apr 2008
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From: 0,0,1
I looked up a fan relay for a 2000 Winstar over at rockauto.com and it appears to be a standard 30/40 amp Bosch style relay. I suggest getting 3 of them at the least. Use 2 of them to power the fans (one each) when the cooling system calls for the fans. Use the third one to control one of the fans when the A/C compressor is energized. Ideally you could have 2 and 2 relays, so that both fans would turn on with the A/C but one should be good enough.
Fleet Owner
Joined: Apr 2008
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From: 0,0,1
I would have to know what the fan motors draw each for amps to be able to answer that one precisely. The controls can be small gauge like #16 or #18 But for the fan motors, in the absents of knowing the amps, I would use #8 gauge at the minimum up until the power splits to each motor. At that point #12 gauge should do it.
Senior User
Joined: Mar 2010
Posts: 167
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From: Fort Gratiot MI
I done this mod on my Navigator. Dont have pics but can tell you how I done if you would like you can PM me your phone number and I can tell you over the phone how I done it to my Navigator.
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Joined: Mar 2011
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ok thanks but the real question is dose it gain mpg or power?I want to strech my MPGS real bad.
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Senior User
Joined: Feb 2009
Posts: 491
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From: Southern Illinois
Stretching your fuel economy has many factors besides the fans. Tire pressures, acceleration, weather, etc. are all against you, me, and everyone else who is trying to maximize economy. In short, yes ditching the clutch fan and moving to a fan setup should net you increased MPG and power, however I wouldn't expect the result to be much. However, don't let me sound negative. I've been wanting to change over to electric fans for a while. It's a proven design and will free up a lot of room in front of the engine and radiator.
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Senior User
Joined: Mar 2010
Posts: 167
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From: Fort Gratiot MI
On mine, an '03 Navigator, without the A/C on, I am getting about 12.5 in the city and about 17-18 on the highway at 70mph. With the A/C on Im getting about 11.5 city and about 16-17 on the highway.
I did a few other things too. Most are in my signature below.
Your not going to gain alot by doing these mods but it does help.
I did my mods to get a little more HP for pulling my RV, and for mileage while pulling it too. With the RV in my signature without the A/C I get between 9-10 mpg at 60mph. So not too bad for a truck with 95,000 on it.
I did a few other things too. Most are in my signature below.
Your not going to gain alot by doing these mods but it does help.
I did my mods to get a little more HP for pulling my RV, and for mileage while pulling it too. With the RV in my signature without the A/C I get between 9-10 mpg at 60mph. So not too bad for a truck with 95,000 on it.
Senior User
Joined: Jul 2003
Posts: 270
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From: tampa bay area
I did an electric fan in a V8 Ranger project a few years ago. I used a DC fan control unit instead of trying to source uber amperage relays. The controlers slowly ramp up power to the fans to avoid that high amp spike upon startup. I and many friends swear by these things. Just another option for you.
Here is the link: Fan Control
Here is the link: Fan Control
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Senior User
Joined: Dec 2009
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From: Cuyahoga Falls, OH
Yeah, I do realize that the mpg's that I gain will be minimal but, every little bit helps. I am thinking that this conversion will help out with acceleration, because she is a dog when it is 85+ degrees.
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