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Flex fan vs. Stock fan with clutch?

Discussion in 'The Garage' started by keith, Nov 1, 2002.

  1. keith

    keith 1/2 ton status

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    Anyone run a flex fan and spacer instead of the stock fan and clutch. Does it cool better. Pro's, con's!! Let me know
     
  2. Bubba Ray Boudreaux

    Bubba Ray Boudreaux 1 ton status

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    It slices, it dices, and you'll bleed like a stuck pig for 14 days............
    It looks cool (more horsepower)
    It sounds cool (more horsepower)
    Doesn't work better (more horsepower?)
    Other than that, that's about all I have to say. /forums/images/graemlins/rotfl.gif
     
  3. beater74

    beater74 1/2 ton status

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    Keith this is what i have heard
    1.very loud
    2.very loud
    3.don't cool as well
    4. too flexable, a deep water crossing may cause it to flex into the radiator /forums/images/graemlins/frown.gif
    5.very loud
    but this is just here say, i have never actually run one.
     
  4. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    The main problem with a flex fan is that it spins at full speed even on the highway(when it's generally not needed). If you live in a cold climate you run the risk of overcooling your engine with the fan constantly engaged.

    The stock clutch setup is designed to cool when needed. That's good enough for me.....
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    A flex fan won't overcool anything...at highway speed the blades have flattened out and are now acting like a big piece of cardboard in front of the radiatior./forums/images/graemlins/shocked.gif

    A 7 blade clutch fan is the best cooling you can get...as long as the clutch isn't fried.

    Rene
     
  6. Tweetysuarus

    Tweetysuarus 1/2 ton status

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    I went electric to have the ability to turn it off when needed, like water crossings.
    Bill
     
  7. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Rene, I wasn't talking about at highway speeds. I was referring to general driving in extreme cold weather. I was told by a local(and believe it or not, very reliable) mechanic that in our area a flex fan can cause an engine to overcool, mainly at idle and low speed driving.
     
  8. 87sm465np208

    87sm465np208 1/2 ton status

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    id say go with the stock fan, ive heard of flex fans breaking, and taking out alot with them, so just a thought.
     
  9. Z3PR

    Z3PR Banned

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    I'm thinking dual electric fans if I add a body lift.
     
  10. HispanicPanic

    HispanicPanic 1/2 ton status

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    i have a flex fan on mine and i have no complains i got an increase in power and mpg i would recomend it, it also gives your water pump more life. But i live in El Paso were its hot most of the time the only complain i can give is that it doesnt cool as well at idle because it needs to have rpm in order for it work well and for that im getting an electric fan as well so that i can flip it on and off as i please /forums/images/graemlins/wink.gif
     
  11. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I can beleive that at low speeds Paul...the thermostatic clutch fan wouldn't be engaged at lower temps whereas the flex is going all the time.

    Rene
     
  12. keith

    keith 1/2 ton status

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    Thanks for the replies. I guess I will keep the stock fan but opt for the dual electric fans. I like the idea of turning them off during the water crossing.
     

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