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Thread: Electric Cooling Fans to Replace Viscous?

  1. 24th June 2009, 12:44 PM #1
    Traco
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    Electric Cooling Fans to Replace Viscous?

    Anyone fitted twin electric cooling fans to a V8 Disco or classic RR in place of the OEM viscous fan? I'm looking to graft a twin set up for an AU Falcon as I've heard this works well and is relatively cheap and effective. Is it worth the effort in terms of noise reduction, releasing a bit more power, fuel consumption?
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  2. 24th June 2009, 01:06 PM #2
    mike 90 RR Guest
    .... YES ....
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  3. 24th June 2009, 01:35 PM #3
    bazista Guest

    Thumbs up

    I had these fitted to an 88 RRC and also changed the cam. Power and torque both felt as though they had improved just by on road performance. Fuel consumption also improved from about 4.5 ks per litre to about 5.5 ks per litre. How much was due to the cam and how much to the fans I don't know, but go for the fans.
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  4. 24th June 2009, 01:40 PM #4
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    Mudsloth
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    Im gonna do the thing cept with one big fan, put an extra switch in that lets you turn them off when you go through deep water.
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  5. 24th June 2009, 01:45 PM #5
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    nice1guv
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    There is info in this thread by stuee about the fan conversion.

    Stuees 97 V8 Disco

    He has already done this conversion and has provided quite a few photos.

    Good on ya stuee!
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  6. 24th June 2009, 06:37 PM #6
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    350RRC
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    Hi,

    I did this on a 74 RRC with a 350 Chev using the standard 3.5 RRC radiator.

    Great mod and have had no probs after 3 odd years. I'm only using a 55 amp alternator as well, with fake EL's.

    Do a search and you'll find more detail from me.

    cheers, DL
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  7. 24th June 2009, 06:51 PM #7
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    Blknight.aus
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    I would advise 2 fans as if you toast one you still have the other to keep you going although you have to watch your noisey pedal.

    if you go dual fuse them individually and include a manual bypass switch in case the thermo switch lets go. (not uncommon but not a daily occourance either)
    Dave

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  8. 24th June 2009, 11:59 PM #8
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    Yorkshire_Jon
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    This is one of those questions without a correct answer, only peoples opinions.

    For me... I just cant see the point. At the end of the day vehicle reliability HAS TO BE the key thing (unless its a play vehicle I suppose). Ive seen too many leccy units fail. Its very rare you find a viscous unit fail... Even if it does you can fix it in the field with a pair of the mr's stockings & cable ties..
    Regards,
    Jon
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  9. 25th June 2009, 08:35 AM #9
    Traco
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    Hmm.... seached back and there doesn't seem to be any right or wrong answer on this.

    The benefits of thermos - lower noise, increased fuel economy, more power - appear to be verified by those that have fitted them.

    Most people reckon twin thermo fans are better than one big one, and that they'll keep things cool in city driving. However off road or towing seems to have presented problems for some which were not there with the viscous.

    Twin 12 in Pacet or twin 13 in Ford AU seem to be the preferred fans with a manual override switch just in case. The thermo switch on my wife's Honda failed a few years ago and cooked the motor which ended in a $3k bill for a new motor.
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  10. 25th June 2009, 08:49 AM #10
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    Brute
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    I`ve had twin 12" thermo`s on the rangy ute for a few years. I have an over ride switch to turn them off through water ( with a beeper so you dont forget) or on permanently. I would also recomend fitting a capiliary type temp guage so you know the actual temp and not just the red or blue band.
    The V8 generally runs hotter the higher the revs so you useually find that the fans stay on when you`re cruising and turn off it it sits idling depending at what temp you set the thermo switch.

    Ian
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