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Thread: electric fan CFM?

  1. #1
    Registered irish1371's Avatar
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    Default electric fan CFM?

    Can anyone give me a min CFM needed in an electric fan kit? I'm looking at changing my fan over and need a basis to start at to get the right size for the job
    98 Chilli Pepper Sport
    2.5" OME 1.25"BL
    1"MML 33x15x12.5

  2. #2
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    I don't know how much air you'll need to move, but if you're dead-set on an electric fan, the Flex-a-Lite #485 is supposed to be the best. http://www.flex-a-lite.com/auto/html/jeep-wrangler.html

    Summit Racing has them for $300 here: http://store.summitracing.com/partde...5&autoview=sku
    '01 TJ, AW4, NP242, York OBA

  3. #3
    Registered irish1371's Avatar
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    anyone else know about what cfm is needed to keep a 4 .0 happy?

    thanks for the links dave
    98 Chilli Pepper Sport
    2.5" OME 1.25"BL
    1"MML 33x15x12.5

  4. #4
    Registered Chris142's Avatar
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    The stock mechanical fan with a working fan clutch will do 10,000 cfm @ 2200 rpm when the clutch is fully engaged. Mechanical fans are rated at that speed, I dunno about electric ones.



  5. #5
    Registered Edmond's Avatar
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    I had dual 10" fans in my TJ and could not keep it cool. I think it was just under 2000cfm total. I switched to a single 16" Be Cool fan I think it was 2400-2800cfm and didn't have any problems.

  6. #6

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    Install a Taurus fan with the appropriate controller. 3800 CFM on high, and fairly easy to install into a TJ. More than enough air flow and with the a Spal or Delta Current Control controller, it will only run at the necessary speed without the harsh on/off cycles.

  7. #7
    Registered DREDnot's Avatar
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    For a clean install, use the factory mopar electric fan from an 05 TJ with the 2.4L
    Bolts right in and is 2 speed and is bigger than a taurus fan and moves enough air for the hard working four cylinder.



    2012 KK Cherokee, 3.7L/42RLE/MP1522, D30M/8.25 @ 3.73, 215/85R16LT
    1991 YJ Sahara 4.0L/AX-15/NP231, D30/D35C @ 3.07, 30x9.50R15
    "Non Vi Sed,Arte."

  8. #8
    Registered Knuckelhead's Avatar
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    Quote Originally Posted by DREDnot View Post
    For a clean install,
    ?...
    "Here's my strategy on the Cold War:
    We win, they lose."
    - Ronald Reagan-

  9. #9
    Jeep Enthusiast Flash- '00 TJ's Avatar
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    Here's my Taurus fan. $22 from the junk yard incl 2 relays + $10 for wire, heat shrink, switch etc.

    Cut to fit factory shroud:


    Riveted it in. :


    Installed:
    2000 TJ - 4" lift, 35's, Lockers, Winch, etc.
    2004 WJ - 2" lift, 31's
    1998 XJ - 2" lift, 29's

  10. #10
    Jeep Enthusiast Flash- '00 TJ's Avatar
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    ...sorry about the size of the pics!
    2000 TJ - 4" lift, 35's, Lockers, Winch, etc.
    2004 WJ - 2" lift, 31's
    1998 XJ - 2" lift, 29's

  11. #11
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    I went with a Taurus fan and cut it to fit the shroud like Flash. They move an obscene amount of air. I had a flexalite on my last TJ, and there's just no comparison.
    His: 2005 Silver LJ Rubicon - http://gprguy.com/
    Hers: 2005 Khaki LJ Rubicon - http://gprgrl.com/
    Grocery Getter: 2001 Sienna Pearl Coat XJ Sport

  12. #12
    Registered DREDnot's Avatar
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    Here it is in the 4 cyl. It bolts right in to the 4.0L rigs with no cutting or fabbing of mounts . All you need is the controller of your choice.

    2012 KK Cherokee, 3.7L/42RLE/MP1522, D30M/8.25 @ 3.73, 215/85R16LT
    1991 YJ Sahara 4.0L/AX-15/NP231, D30/D35C @ 3.07, 30x9.50R15
    "Non Vi Sed,Arte."

  13. #13

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    The 2.4L cooling fan looks like an excellent choice, if it can move enough air. The fact that it can be installed, including the overflow tank, without any custom brackets is very appealing. Does anyone have a CFM rating for it? Any idea on price and availability?

  14. #14
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    Black Magic is what i have in my TJ built by Flex-a-lite it is a great fan I called Flex-a-lite and the customer help was great and got me the right fan fast and easy with easy to follow instuructions..thats what I would reccoment a little time on the phone with Flex-a-lite
    TJ 98' Blue, 31's on American Racing wheels, AEM Brute Force Intake, 4.0L,3 speed automatic, Borla Header into 3'' exhaust Magnaflow muffler, 4:10 gears, BeCool electric fan, Warn gas tank skid, Skidrow Radiator plate,Steering box skid and still growing....

  15. #15
    Registered DREDnot's Avatar
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    Dont know the CFM.
    Its available from any jeep parts dept.
    Fan Module P/N 55037694AB
    Retail was $230 but if you have a good parts guy you usually get it cheaper
    I paid around $189
    2012 KK Cherokee, 3.7L/42RLE/MP1522, D30M/8.25 @ 3.73, 215/85R16LT
    1991 YJ Sahara 4.0L/AX-15/NP231, D30/D35C @ 3.07, 30x9.50R15
    "Non Vi Sed,Arte."

  16. #16
    Registered Nighthawk98TJ's Avatar
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    Go with a Taurus fan if you want to move a lot of air and have two speeds. I'm in the middle of my install and it's a great fan and fun project if you like wiring projects. And, if not, you can buy a fan controller and then the wiring is very simple. I prefer to put everything together myself, but I like electrical projects.

    Not to mention, you can do it very cheaply... I paid $30 for the fan, plus wire, a couple high amperage relays, a switch and my time. But I enjoy it, so I don't factor in my additional time.

    Good luck.
    1998 Jeep Wrangler (TJ) 2.5L Automatic
    RE 3.5 · JKS 1.25" BL · 35" Cooper STT's · D30 Lockright · Yukon 35 + Detroit · Many Other Mods

    GO PREPARED · SEARCH & RESCUE

  17. #17

    Default Does anyone have a factory wiring diagram to do this?

    I know this is an old thread but I figured there is no sense in creating a new thread on this.

    I am thinking about doing the same thing to facilitate a future body lift in my '04 LJ. I'd like to run the wiring, fuses and relays through the factory power distribution center.

    What did Jeep use for the fan controller? Where and how were the sensors placed?
    '04 Unlimited
    Likes the rocks and mud but wants to Fly!!
    AEV Highline Kit, JKS Control Arms, Extreme Corner front bumper, Warn winch, Tomken swingout tire carrier w/ dual gas can carrier, Tuffy Security boxes.

    '97 SE
    2" ProComp Lift, 31x10.50 M/Ts on 15x10 Magnum 44s, Tuffy Security boxes.
    Horrible on the highways but has never let me down off road.

  18. #18
    www.stu-offroad.com Stu Olson's Avatar
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    If I were doing it, I wouldn't tap into any of the factory hardware & electrical to power the fan.

    I would use my own 12V relays to control power, fuses, temp sensor, and a cutoff switch. The temp sensor and cut off switch, in series with each other, would supply the +12V to energize the fan's power relay. If you were doing a water crossing, you could open the switch and temporarily stop the fan, else, it will run whenever the temp sensor deems it necessary. I would tap an ignition on wire for the source of the relay's control voltage. This way, your fan won't run when you turn off the key....OR.....if you don't want that, then source the relay's control voltage directly from the + terminal of the battery.

    There are several ways to do it....I would use this one for my project.
    Stu's '98TJ Sahara
    ARB Locked & Loaded
    www.stu-offroad.com

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