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any one running electric radiator fans

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by **DONOTDELETE**, Apr 3, 2001.

    been contemplating an electric fan or dual fans and want to get comments good or bad on them. i have a 4 core and don't have any overheating problems. i like the idea of being able to turn them on or off depending on conditions.

    78, 350/350/203, 3/4 ton, 4" lift, 35" BFGs
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  1. prjt_blzr

    prjt_blzr 1/2 ton status

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    I'm running two black magic electric fans on my BBC. I also use a custom Be Cool rad. I've been told that this will be more than sufficient to keep the water temp at 180. Now if the thing were only complete........ The maker of the Black magic fan has a dual version that they claim will keep a BBC cool. It does require the large diesel or big block rad though. If you go this route you need a high output altenator and upgraded wiring to handle the load of the fans, lights, wipers, heater fan etc.
     
  2. Burt4x4

    Burt4x4 3/4 ton status

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    I am using the single Flex-A-Lite Black Magic M150 (few that's a long name) anyway the thing works GREAT! I have a 3row and mildly built 350 with a Summit highFlow water pump and my rig has 0 cooling issues even in the Valley heat of 105 my rig never goes above 200. In the winter I am barly using the fan at all. I do sut it off when on the Hwy so the trick for me is to remember to flip it back on when I pull of the freeway......I've had it for a couple of years now and it seams to be worth the 180 bucks. Plus it was the highest rated single fan I could find at 2800cfm...
    Good luck

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
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  3. Depdog

    Depdog 1/2 ton status Author

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    I have the Duel Flex A Lite fan that was mentioned above, I will be installing it soon and can let you know how it performs them.

    Depdog

    <font color=blue>Weenie K5, little mods' Small Tires!</font color=blue>

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  4. Emmettology 101

    Emmettology 101 3/4 ton status

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    I am runnign one elec. and the normal stock fan. Make sure your radiator is in good shape and clean inside before swapping to an elec. My rad is a tad small and I need the mech fan also to cool. My elec is a 16" fan..

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>

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  5. BurbinOR

    BurbinOR 3/4 ton status

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    On my 406SB am running an IROC electric fan with my 4 core radiator. No problems with cooling, so far no issues whatsoever. If you and I make it to the TSF or Sand Lake run on April 14th (not sure if I can yet) you can see my setup. Don't have mine setup yet for manual shut off but it is a very simple thing to do.

    <font color=orange>'79 - 406 TPI -<font color=orange> K5#5 - <font color=blue>See it at---&gt;<A target="_blank" HREF=http://www.blazzinor.coloradok5.com>http://www.blazzinor.coloradok5.com</A>
     
  6. mudhog

    mudhog THEGAME Staff Member Super Moderator

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    this is on my to do list but they do work good you just need to get in the habit of turning them on and off

    77blazer see it at<A target="_blank" HREF=http://community.webshots.com/user/ssmith6333>http://community.webshots.com/user/ssmith6333</A>[​IMG]
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    I think if you are having no problems, don't go to the hassle. If you are interested in having an additional fan, having it wired in with a switch so that it came on when engine temp was X degrees (so that it would prevent overheating above say 210) would be a good idea. The stock clutch fan flows a very large amount of air, and steals very little HP. Gotta remember that an electric fan runs off the engine just like a clutch fan, just takes a little less direct route. Probably more efficient in that regard than the clutch, but how much is anyones guess. Other factors such as weight on the water pump, etc, come in, but thats all going to be heresay unless someone comes up with some tests.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  8. coham

    coham Newbie

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    I just recently installed one when I put a new 350 in. Love it. I haven't had any problems with it. Mine has the thermostat so it turns on and off automatically. You can switch it on and off manually though if you want. Wiring it up is easy and so was mounting it to the radiator.
     
  9. rubiconchevy

    rubiconchevy Registered Member

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    I have the black magic fan on my 73 Blazer and the thing works great. I have a 3 row rad. and run a zz4 motor with no problems. I have had it for about 5 years with no problems. You also get a little more power and better gas mileage by going to an electric fan. Not much, but a little is better than nothing.
     
  10. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Found something good off Junk late 90's Fords. They have HUGE cooling fans on the T-Birds Musdangs and Lincolns.

    Diging it in the dirt with my K5's
    Grim-Reaper
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  11. MTPockets

    MTPockets 1/2 ton status

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    i yanked a 16" puller off a late model bonneville from the local boneyard, 15 bucks. got the adjustable thermostat switch from discount for another 15 and havent had a problem in over a year.
    runs cooler on the trails, not dependent on rpm.
    removed parasitic drag on motor, longer water pump life!
    good luck,
    MTPockets
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  12. ftn96

    ftn96 1/2 ton status

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    If you can find a dual fan or a single large air volume fan you can run the electric and remove the belt drive fan. This will give you a little less drag on the motor and if the fans are right you should be better off than stock. But you gotta make sure your new fan/fans are/is going to give you the proper airflow.

    Will work for beer, parts and tools.
    90 Jimmy 350TBI-700R4-241-33" BFGs-10 bolts w/4.10's
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  13. jarheadk5

    jarheadk5 1/2 ton status

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    Hey Emmettology, is your electric mounted as a pusher or a puller? I would imagine a pusher, but I've got so much room between the engine fan and rad. that I could probably mount a slim-line puller and get away with it...

    [​IMG] Semper Maintenance!
     
  14. Slim_Ruthless

    Slim_Ruthless 1/2 ton status

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    I'm going to do the same thing with mine . Get rid of the stock fan & fit a single large or 2 small fans as pullers cause my home made alloy grill is a B%#$^ to remove . I think the Single large flows more .

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