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Electric fan?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by MaGuyver, Feb 17, 2009.

  1. Feb 17, 2009 at 5:50 AM
    #1
    MaGuyver

    MaGuyver [OP] Well-Known Member

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    Charleston, SC
    True Flow XDI cai, DT short headers, Tinted glass, Line-X coated rails, bed mat
    Hello,
    I know this has been covered but can't seem to find the answers I need. Help!
    I have a 2007 Tacoma V6. The engine/cooling/radiator fan draws power directly from the engine which takes horse power. If I were to replace this fan with an electric model, would I see any throttle response in take off or lower speed gains when passing? Would there be an increase in MPG. Has anyone done this?
    Thanks.
     
  2. Feb 17, 2009 at 5:56 AM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    You might see a little. The Engine fan uses a Viscuss coupling to the engine, and doesnt draw as much h.p. from it as you may think. A few decades ago (Pre 1990), many engines had the fan bolted directly to the engine, and it resulted in a parasitic drag up to 15 h.p.. Now days, they dont take more than 5 h.p. away from the engine. If you install an electric fan, keep in mind they also have a drag on the engine. When running, they can add extra load to the alternator, resuting in drag on the engine. Not as much as the engine driven fan, but a drag none the less. Also, depending on what you do with your truck, you may want to weigh out the benafits vs. drawbacks of the electric set up. For example, if you tow anything, you may want to just keep the engine fan.
     
  3. Feb 17, 2009 at 6:32 AM
    #3
    MaGuyver

    MaGuyver [OP] Well-Known Member

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    Ok, sounds good. Since i do tow a boat, I think i will leave it alone.
     
  4. Feb 17, 2009 at 9:35 AM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Thats what I did. :)
     
  5. Feb 17, 2009 at 9:57 AM
    #5
    Snipe

    Snipe Well-Known Member

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    As Chris was saying Fans have come a long ways from what they used to install, you should have seen some of the goofy things we tried in the old days such as flexy fans which were supposed to straighten out the blades at high speeds and reduce drag, most ended up grenading and throwing hunks of fiberglass around the engine compartment.
    I've only run with one guy that went with an electric fan and it wasn't because he was chasing horsepower, it was because shortly after he dropped a small block Chevy and an auto trans in his CJ he was crossing a stream and hit a hole which dipped his fan under water, fans don't make very good propellers and the blades bent which trashed his brand new Tranny cooler.
    He ended up installing an electric with a switch on the dash so he could shut it off.
     
  6. Feb 17, 2009 at 10:11 AM
    #6
    MaGuyver

    MaGuyver [OP] Well-Known Member

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    True Flow XDI cai, DT short headers, Tinted glass, Line-X coated rails, bed mat
    I have had v8 tundra’s and v6 Tacoma’s and it always seems that in the Tacoma’s there is power loss some place when you start off from a stop. I am not talking gunning it, just normal acceleration. So, I was thinking it was with the fan. I guess it could be a heavy fly wheel.
     
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