OEM cooling system fan upgrade?

Discussion in 'KJ General Discussion' started by drfd74, Jan 24, 2010.

  1. JeepJeepster

    JeepJeepster Full Access Member

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    Got any situations where it wouldnt? And if you say on the hw at 60mph it wouldnt matter anyway.
     
  2. tjkj2002

    tjkj2002 Full Access Member

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    Most aftermarket electric fans(Flexalite) will outflow a OEM electric and mechanical fan combined.Also if you have a flex fan they push almost zero CFM's after a certain RPM anyway.
     
  3. Dave08

    Dave08 Full Access Member

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    Ever driven a jeep with the 42RLE?. 2500= ~80 maybe more

    The Mech. Fan is more in play during low speed with more than typical RPM's anyway
     
    Last edited: Jan 26, 2010
  4. JeepJeepster

    JeepJeepster Full Access Member

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    Yeah thats true. I just assumed we were talking about the stock cooling since thats what the thread starter was asking about.
     
  5. J-Thompson

    J-Thompson Full Access Member

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    Sure a mechanical fan will pull real good up to 2500 rpm
    but it pulls very little at 800 rpm
    The electric fan will pull max cfm even with the engine
    off
    install an electric water pump and you could cool your engine
    with it turned off

    Just FYI
    I have 2 fans on my TJ
    oem mechanical and an 8" electric for the trans
    but when I put the cooler on the power steering
    it will cool tha also
     
  6. tjkj2002

    tjkj2002 Full Access Member

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    Your coolant still circulates even after you turn the engine off as long as the t-stat is still open,not real fast but still moves until the t-stat closes.
     
  7. J-Thompson

    J-Thompson Full Access Member

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    I am talking good flow
    not a trickle

    This was discussed in length on another forum and if you install
    an electric fan and water pump along with an adjustable t-stat for the fan but relay the water pump off of it then you could cool your engine after you make a long hard climb with it off