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Does anyone have actual MPG or HP #'s from electric fan conversion?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Blue85, Aug 24, 2001.

  1. Blue85

    Blue85 Troll Premium Member

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    Does anyone have actual MPG or HP #\'s from electric fan conversion?

    I have been looking into this for quite a while and there are obvious pros and cons to both electric and clutch driven fans. If there is any real improvement in economy, I want to jump on it. I already have an electric pusher on front of the A/C condensor, I would take off the fan, clutch and shroud and put on dual puller electric fans from the junkyard and run them together on a thermostat.

    I'm looking for actual experience or data and not hearsay.

    <font color=green>If a K-5 is "Built not Bought", why does this stuff cost me so much money? [​IMG] </font color=green>
     
  2. arq

    arq 1/2 ton status

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    Re: Does anyone have actual MPG or HP #\'s from electric fan conversion?

    that explains it, you're an engineer. lol

    ARQ.

    1-72 4x4 CST Blazer
    2-71 4x4 CST Blazer
     
  3. BIGRIG

    BIGRIG 1/2 ton status

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    Re: Does anyone have actual MPG or HP #\'s from electric fan conversion?

    From what I remember I think dropping your clutch adds 5? horse roughly. I have twin elecs. and it cools so much nicer...I hooked it up to a thermal switch and they turn on and off all by themselfs.

    MY DRINKING TEAM HAS A FOUR WHEELING PROBLEM![​IMG]
     
  4. Executioner

    Executioner 1/2 ton status

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    Re: Does anyone have actual MPG or HP #\'s from electric fan conversion?

    Its kinda hard to get good test results, just to many veaiables, kinda like try to mesure MPG with your headlights
    on, vs. off. In theroy you know the alternator has to supply more juice.
    You know if it was less than 1 MPG better with the electric's, the marketing guy's will say you'll get up to 5 MPG
    better with the electic's.
    Again if you can take advantage of speed's above 35-45 MPH, and have some extra heat sink in the cooling
    system now, you will see some improved MPG.
     
  5. DesertDueler

    DesertDueler 1/2 ton status

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    Re: Does anyone have actual MPG or HP #\'s from electric fan conversion?

    On my firebird, when I switched from a mechanical water pump and fan with an AC Delco clutch, to an electric fan and a electric water pump, I GAINED 20.1 HP and 30.5 FT Lbs of Torque to the rear wheels.

    86 Jimmy 4"lift 35"MTRs locked front.Other cars 69 Firebird w/525 hp,and 70 GTO <a target="_blank" href=http://www.geocities.com/modifierperformance>MY vehicles</a>
     
  6. Triaged

    Triaged 1/2 ton status

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    Re: Does anyone have actual MPG or HP #\'s from electric fan conversion?

    You don't have to figure in the extra draw from the alternator because they only turn on at 220 deg which you should never see except in stop and go traffic (where you don't care about MPG or HP).

    '71 Blazer CST w/ a 400sbc, 4" lift, 36" Supper Swampers, and alot of rust
    <a target="_blank" href=http://community.webshots.com/user/triaged>See it Here </a>
     
  7. EDdaTREE

    EDdaTREE 1/2 ton status

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    Re: Does anyone have actual MPG or HP #\'s from electric fan conversion?

    The Sept. '01 issue of 4WOR says 12 hp and 16 lb.-ft. of torque on page 122.

    "The mud is lovely, dark and deep, but I have U-joints to change before I sleep"
     
  8. dyeager535

    dyeager535 1 ton status Premium Member

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    Re: Does anyone have actual MPG or HP #\'s from electric fan conversion?

    Always the cynic, whats the comparison electric versus which "stock" fan? Clutch fan, flex fan, thermo-clutch fan?

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</a>
    No anti-theft measures on your truck? No pity when its stolen
     

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