Re: 5 blade cooling fan mod.

[Tony Lum <tlum@flash.net>]

At 12:15 PM 8/6/98 -0400, you wrote:
>>Hi gang,
>>
>>Anyone looking for a quick cooling modification on early 4kqs and Coupe GT
>>(Ur-q's too I think) can replace the stock 3 blade fan with a 5 blade fan.
>>Its p/n 443 959 465 and costs all of $19.  You can pull the fan shroud
>>without removing the radiator and do the swap in under a hour.
>The 20v 200 uses a 5(or is it 6?) blade fan, with blades that are more
>curvy.  It's much quieter than the 5k fans, which used straight blades and
>made a god-aweful racket.
>
>Before you do the upgrade, make sure you're going to the 200q20v style and
>not the 5k style; the newer design is more efficient and much quieter.
>
>Brett
>
>------
>Brett Dikeman
>brett@pdikeman.ne.mediaone.net
>~)-|
>Hostes alienigeni me abduxerunt.  Qui annus est?
>Te audire non possum.  Musa sapientum fixa est in aure.
>Ita, scio hunc 'sig file' veterem fieri.
>------
> 
The 5 blade fan I'm referring to can only be used on the 350W motors used
in 4kqs and CGTs (and Urqs I think).  The fan is retained by a clip and is
completely different from the 500W motors used in the type 44 chassis which
use a left hand threaded nut.  I've got a 7 blade fan ready to install on
the 5kcstq (thanks to Dave Head) and it has curved scythe-like blades.  It
seems the more blades a fan has, the higher its frequency pitch, which it
more pleasing to the ear IMHO.



-Tony
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Tony Lum                                  1987 5000CS Turbo Quattro
Berkeley, California, U.S.A.                1985 4000CS Quattro
Audi Owner/Driver/Mechanic by Necessity ;^)   1980 5000S Sedan
                                               1987.5 Coupe GT
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