Re: HVAC intake

[Tom Nas <tnas@euronet.nl>]

Todd Young <tyoung@wamnet.com> wrote:


>Made a small modification to my 93 90S.
>We have a LOT of cottonwood trees in this area
>and the white fluffy crap flies around all summer.
>I wanted to prevent plugging up my core when I
>have the power vents on (on A/C I usually recirc
>the air).

(snip)

>I then pulled that grill off the intake and took it
>inside. I pulled out the hot glue gun and proceeded
>to glue some fiberglass screen on top of the plastic
>grill. It hasn't affected air flow that I can notice and
>I'm hoping that the screen will catch any cottonwood
>seeds floating around. Now I just need to check/clean
>it periodically. You can purchase the fiberglass screen
>from any local hardware store, it's just your typical
>window screen. You only need a piece about 12"x12".

A good idea. A couple of years ago, I purchased a modified intake housing
for my (then) 80, into which mounts a replaceable pollen filter element.
Unfortunately, it seems that the intake housing itself is no longer
available here, but the filter elements are. I've just transferred the
housing to my 'new' 90q, and replaced the filter element. The old element
was totally black on one side, pure white on the other. It works! No stuff
in my vents, less dirt on the inside of my windscreen, even less diesel
soot in my lungs. According to the box, it keeps out 90% of all the pollen
and road dust. Even particles as small as 0.01 um (soot, tobacco smoke) are
filtered out by more than 50%. It reduces air flow by 7.5% when new.

The housing fits the 80/80q (9/86-), the 90/90q (2/87-) and the coupe (12/88-).
Part number for a housing is 893 091 401, and it includes a filter element.
Elements are to be replaced every 10k miles/12 months, part number 893 091 700.

Easy to fit (took me 15 minutes second time around, which includes cleaning
the intake area) and even easier to recharge.

Tom

 _______________________________________________________________________
 Tom Nas                                          Zeist, The Netherlands
 tnas@euronet.nl
 1987 Audi 90q 2.3E, Tizianrot metallic, 164,000km

Tell a man there are 300 billion stars in the universe and he'll believe
you.                     Tell him a bench has wet paint on it and he'll
have to touch to be sure.