[s-cars] Viscous fan clutch failure?

Fri May 11 21:00:36 EDT 2007

It's be said that the fan from a VR6 Sirocco is the one to use.
Like I said earlier, I will scoop what's left of the dual set-up on the V10.

----- Original Message ----- 
From: "Theodore Chen" <tedebearp at yahoo.com>
To: "Mark Strangways" <StrangConst at rogers.com>; <josh at spiny.com>; 
<S-CAR-List at audifans.com>; <djdawson2 at aol.com>
Sent: Friday, May 11, 2007 8:37 PM
Subject: Re: [s-cars] Viscous fan clutch failure?

> yes, there's some parasitic drag from the mechanical fan.  the advantage
> of the electric fan is that it operates on-demand, and when the car is
> moving, it will likely not be running because there will be enough airflow
> through the radiator.
>
> replacing the mechanical fan with an electric fan is probably worth a
> few hp - if the electric fan isn't running.
>
> i replaced the mechanical fan on my mustang with an electric fan, but
> primarily for reliability reasons.  the mechanical fan was driven off
> the water pump on my 5.0, and in heavy track use, that tends to kill
> water pump bearings because of all the weight hanging out there.
> that's not an issue with our cars, so i would be inclined to keep
> the current mechanical fan setup unless you're having trouble finding
> a replacement viscous clutch.
>
> if you do decide to install an electric fan, make sure you use an OEM
> fan.  i would not trust the aftermarket electric fans.  they aren't
> built to last.  the construction is cheaper - thinner wires, low quality
> bearings.  i'd rather go to the junkyard and look for a fan from a
> FWD car with a V6 or V8.  they tend to be very crowded in the engine
> compartment, requiring a thinner fan with more power to keep them cool.
>
> -teddy
>
> --- Mark Strangways <StrangConst at rogers.com> wrote:
>
>> Not really a free ride. It does steal HP
>> Maybe like you said an electric clutch that would dump it under high rpm 
>> /
>> high load usage.
>> After all who needs a fan at 150 MPH
>>
>> Mark
>> ----- Original Message ----- 
>> From: <djdawson2 at aol.com>
>> To: <StrangConst at rogers.com>; <josh at spiny.com>; <S-CAR-List at audifans.com>
>> Sent: Friday, May 11, 2007 7:24 PM
>> Subject: Re: [s-cars] Viscous fan clutch failure?
>>
>>
>> >I don't think there's anything "wrong" with electric fans... it's just 
>> >that
>> >they tend to use rather high current motors.  That mean relays and
>> >switches... and increased alternator load.  An engine driven fan is
>> >essentially a "free ride" so it makes more sense to me... when it's an
>> >option.  Some engine compartments just don't have the space.
>> >
>> > Dave
>> >
>> >
>> > -----Original Message-----
>> > From: StrangConst at rogers.com
>> > To: josh at spiny.com; S-CAR-List at audifans.com; djdawson2 at aol.com
>> > Sent: Fri, 11 May 2007 5:21 PM
>> > Subject: Re: [s-cars] Viscous fan clutch failure?
>> >
>> >
>> > What's wrong with electric fans.
>> > I guess other than the weight of the motor.
>> >
>> > I just saw Audi Canada's wrecked (at Mosport) 2007 S8 V10 (5.2 l) it 
>> > has
>> > one electric fan left...
>> > Gonna see how it will fit.
>> > Anyone want an S8 interior, or motor ? What is left of the car is all 
>> > for
>> > sale
>> >
>> > Mark
>> > ----- Original Message ----- 
>> > From: djdawson2 at aol.com
>> > To: josh at spiny.com ; StrangConst at rogers.com ; S-CAR-List at audifans.com
>> > Sent: Friday, May 11, 2007 7:06 PM
>> > Subject: Re: [s-cars] Viscous fan clutch failure?
>> >
>> >
>> > Still yet, the best solution is the fan clutch that is activated much 
>> > like
>> > the A/C clutch.  No engagement at all when not required, and then full
>> > engagement when needed.
>> >
>> > Haven't seen that on cars yet.
>> >
>> >
>> > -----Original Message-----
>> > From: josh at spiny.com
>> > To: StrangConst at rogers.com; S-CAR-List at audifans.com
>> > Sent: Fri, 11 May 2007 4:33 PM
>> > Subject: Re: [s-cars] Viscous fan clutch failure?
>> >
>> >
>> > Mark, that might be true on old cars without modern fan clutches, but
>> > the clutch is there to keep the fan from robbing too much power, and
>> > also to keep the noise down.  The idea is that the hotter the air
>> > gets around the fan, the more air it moves.  Plus, a viscous clutched
>> > fan is able to move much more air than an electric fan, and more
>> > reliably too. They're not without their problems, but they do have
>> > some important advantages over electric fans.
>> >
>> > On May 11, 2007, at 8:36 AM, Mark Strangways wrote:
>> >
>> >> Yank that sucka outta there and put in an electric.
>> >> Good for about 30-50 HP... Dyno proven
>> >>
>> >> Mark
>> >> ----- Original Message -----
>> >> From: "Peter Golledge" <petergolledge at gmail.com>
>> >> To: <s-car-list at audifans.com>
>> >> Sent: Friday, May 11, 2007 9:05 AM
>> >> Subject: [s-cars] Viscous fan clutch failure?
>> >>
>> >>
>> >>> Folk,
>> >>>
>> >>> My wife reported some unusual noise from her 95 S6 and no A/C.  I
>> >>> check
>> >>> out
>> >>> the car last night... everything seems fine.  Get it up to
>> >>> operating temp
>> >>> with a drive, still no problems.  Looking at the primary fan I see it
>> >>> turning maybe 60 rpm with the engine idling.  Stops with the touch
>> >>> of bit
>> >>> of
>> >>> plastic scrap.  No huge play in the clutch but I suspect its
>> >>> dead.    Any
>> >>> BTDT on the list?
>> >>>
>> >>> With the fan blades off I can easily get a big 32" spanner on the
>> >>> clutch.
>> >>> Anyone removed it by holding the pulley with rubber filter strap or
>> >>> similar?
>> >>>
>> >>> Regards
>> >>> -- 
>> >>> Peter Golledge
>> >>>
>> >>> 95 S6, 89 200TQA, 87 LT-1Q, 1979 930
>> >>> _______________________________________________
>> >>> S-CAR-List mailing list
>> >>> S-CAR-List at audifans.com
>> >>> http://www.audifans.com/mailman/listinfo/s-car-list
>> >>>
>> >>
>> >> _______________________________________________
>> >> S-CAR-List mailing list
>> >> S-CAR-List at audifans.com
>> >> http://www.audifans.com/mailman/listinfo/s-car-list
>> >
>> > _______________________________________________
>> > S-CAR-List mailing list
>> > S-CAR-List at audifans.com
>> > http://www.audifans.com/mailman/listinfo/s-car-list
>> >
>> >
>> >
>> > AOL now offers free email to everyone. Find out more about what's free
>> > from AOL at AOL.com.
>> > ________________________________________________________________________
>> > AOL now offers free email to everyone.  Find out more about what's free
>> > from AOL at AOL.com.
>> > _______________________________________________
>> > S-CAR-List mailing list
>> > S-CAR-List at audifans.com
>> > http://www.audifans.com/mailman/listinfo/s-car-list
>> >
>>
>> _______________________________________________
>> S-CAR-List mailing list
>> S-CAR-List at audifans.com
>> http://www.audifans.com/mailman/listinfo/s-car-list
>>
>
>
>
>
> ____________________________________________________________________________________Boardwalk 
> for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for 
> today's economy) at Yahoo! Games.
> http://get.games.yahoo.com/proddesc?gamekey=monopolyherenow
> 