Anyone have a Flex-a-lite 575 fan on their CJ7? - JeepForum.com
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post #1 of 25 Old 12-07-2008, 09:46 PM Thread Starter
OSUAV8R
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Anyone have a Flex-a-lite 575 fan on their CJ7?

I was wondering what you guys think of it, I am finishing up a rebuild and was wondering if it was worth the $330 for the fan or just stick with the stock fan.

I have an 85 CJ7 with a 258

Thanks

Nathan

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post #2 of 25 Old 12-07-2008, 09:51 PM
hlosada
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I have it on my 92 YJ with a 4 cylinder
Installed to give more HP to the wheels and have power to turn off and on when I want to, off while crossing deep water

hope this helps

Henry
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post #3 of 25 Old 12-07-2008, 09:52 PM Thread Starter
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Henry, did you see a real improvement?
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post #4 of 25 Old 12-07-2008, 11:22 PM
HackFabrication
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Go with the Contour/Mystique dual fan:


Available in your friendly P&P for under $50, they pull 3200 cfm, and draw under 20amps when running on high.

"In the end...It's all Hack."
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post #5 of 25 Old 12-07-2008, 11:47 PM
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I am finishing up my Contour fan now and Hack has some great info on this setup! Fan ran me $30, plus a FAL controller for ~ $100.00.
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post #6 of 25 Old 12-08-2008, 06:19 PM Thread Starter
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what is a FAL controller, how hard is it to set up?
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post #7 of 25 Old 12-08-2008, 06:21 PM
mike4089
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I had the flex a lite 575 fans, and they were awesome...I just got rid of them because my new aluminum radiator that i am using for the 5.3 swap wasnt wide enough...so i bought the 160s blade fan from them with thermostat control...very happy so far
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post #8 of 25 Old 12-08-2008, 06:28 PM Thread Starter
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want to sell the 575?
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post #9 of 25 Old 12-08-2008, 06:41 PM
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Quote:
Originally Posted by hlosada View Post
I have it on my 92 YJ with a 4 cylinder
Installed to give more HP to the wheels and have power to turn off and on when I want to, off while crossing deep water

hope this helps

Henry
Does it help with your HP to the Wheels???? I am thinking the same thing. Does this add a little pep to a 4 or 6 banger. The I6 is a 100-120 HP engine would this yield 5-10 HP??? What do you think?? Could also yield a little mpg also.


X2 on the Countour Electric FAN.... I printed all that info... good stuff. Nice job Hack and the others that posted about a month ago. Someone should post the link to that write up here, it was about the controlers if I remember right.

I went and looked. Here is the link. EXCELLENT!!!!https://www.jeepforum.com/forum/showthread.php?p=6024819

Thanks,
Fred

Last edited by Fjguercio; 12-08-2008 at 06:58 PM.
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post #10 of 25 Old 12-08-2008, 06:57 PM
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Quote:
Originally Posted by OSUAV8R View Post
want to sell the 575?
already sold...sorry!
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post #11 of 25 Old 12-08-2008, 07:04 PM
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Quote:
Originally Posted by OSUAV8R View Post
I was wondering what you guys think of it, I am finishing up a rebuild and was wondering if it was worth the $330 for the fan or just stick with the stock fan.

I have an 85 CJ7 with a 258
Thanks
Nathan
I have a flexilite twin electric fan on my rig ....it cools very good, was easy to install, and haven't had a lick of trouble with it in 2 years.. [knock wood]


Steve

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post #12 of 25 Old 12-08-2008, 08:32 PM
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Contour fans are the way to go. Cheap and easy to install. Plus I think they look better then an aftermarket fan.
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post #13 of 25 Old 12-08-2008, 08:45 PM
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FAL is just short for Flex-A-Lite. There are few ways to go. Hack is using the 31163 controller (variable speed and temp probe directly into coolant). I went with the 31165 controller (60/100% speed and temp probe poked through radiator fins). Both have connections for AC and a way to wire up a kill switch to turn them off for deep water crossings. I have not finished my install yet but think it will work fine for my use. JeepHammer posted up a diagram on how to do it without a FAL controller using relays, etc.

This is the thread that sparked my interest in the Contour fan.
https://www.jeepforum.com/forum/showt...ht=contour+fan

Last edited by VACJ7; 12-08-2008 at 11:43 PM.
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post #14 of 25 Old 12-08-2008, 10:52 PM Thread Starter
OSUAV8R
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For those of you with the fans, do you really notice any improvement in power and MPG. What other benefits have you noticed?
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post #15 of 25 Old 12-09-2008, 12:40 AM
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One benefit of the FAL 31163 is that it will soft start the fans at 60% by 'hitting' the motors with spikes of voltage/current to get them turning, eliminating the need for relays. Electric fan motors draw large amounts of current to start, then 'settle down' to a lower current draw as they reach designed rpms. As an example (numbers not accurate) a Taurus 3.8L fan may draw up to 80 amps when starting on high, but will only draw 30-35 amps when running on high. Which is why you either have to use really heavy gauge wire and switches, or use relays to handle the initial current draw.

I can't speak for performance or mileage increases: I've got a Ford Racing 5.0L engine rated at 345hp on premium pump gas, with 4.56 gears. I'll be estatic if I get 12mpg....

"In the end...It's all Hack."
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