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Electric fans

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by '73 K5, Jul 10, 2001.

  1. '73 K5

    '73 K5 1/2 ton status

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    I'm thinking of ditching my clutched fan in favor of one or two electric fans for the 10-15 horsepower gain. Also so I can turn it off for a deep water crossing. For a 300-320 horse 350, how many CFM's do I need? What are you guys running? TIA

    '73 K5
    Chevy good...Ford bad
     
  2. Emmettology 101

    Emmettology 101 3/4 ton status

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    A lot of it epends on your current condition of your cooling system.

    I had a friend with a stock 350 and he gets away with using one 14"-16" fan from a car(not sure which make) that another friend gave him. I cant do that becuase I think my radiator is gummed up. I am running a 16" Auto Zone fan and a Flex fan and it still warms up from time to time.

    Not sure on the CFM part.... But I would think the bigger the better! ;)

    <font color=green>MIKE</font color=green> - "Hukd on fawnics,werkd fer me!"
    <A target="_blank" HREF=http://www.geocities.com/emmettology101>http://www.geocities.com/emmettology101</A>
     
  3. BobK

    BobK 1/2 ton status

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    I believe the stock clutch fan pulls approx. 4000-5000 cfm but don't quote me.
    Click the link,I just posted my install of two 14" electric fans in my 71 Blazer.
    <A target="_blank" HREF=http://www.coloradok5.com/forums/showflat.pl?Cat=&Board=blazer4x4&Number=171632&page=6&view=collapsed&sb=5>http://www.coloradok5.com/forums/showflat.pl?Cat=&Board=blazer4x4&Number=171632&page=6&view=collapsed&sb=5</A>

    <font color=green>BobK<font color=green>
    <A target="_blank" HREF=http://www.zing.com/picture/p8947726813026de684f60e0bd6f3fbfe/fe8f5839.jpg>http://www.zing.com/picture/p8947726813026de684f60e0bd6f3fbfe/fe8f5839.jpg</A>
     
  4. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    You should do a search on electric fans - many long discussions on pros/cons.

    Dave

    Beauty is in the eye of the beer holder.
     
  5. newyorkin

    newyorkin 1 ton status

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    I heard the best thing to do was leave the clutch fan in and install a blowing fan in front behind the grill, especially if you have a weak cooling system.
    I just pulled out my radiator last week, cleaned it, and soldered up some holes, though, so I might go electric only for a couple weeks and see how the temps do. It's been running super-cool since I relocated the tranny cooler and cleaned out all the fins on the condensor and radiator.
    I plan to grab a second shroud from the local junkyard, and cut it up to bolt the electrics into it nicely.
    I found a fan from a Honda accord that's got big blades and a small diameter, so if I stay with a clutch fan, that one will go behind the grill as a supplement. Otherwise, I have about a dozen various GM fans I've been collecting for months for this...


    Ratch
    <A target="_blank" HREF=http://k5.8m.com>http://k5.8m.com</A>
    **K5 - What more is there to life?**
     

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