Turbo whine

[isham-research.freeserve.co.uk at pop.pol.net.uk]

>> One of the changes between the WR ur-quattro and the MB was the
>> introduction of a silencer in the intercooler intake.  It isn't
>> illustrated on ETKA, but the same change was made to the Type 44 -
>> see A20Q/88/1/45/21-60 items 2 & 3.

> Interesting..  So the whine would travel both directions fron the
> compressor- get mostly absorbed by the air filter, but get radiated
> through the IC?  I can see that.

> What year did they add the silencer?

MY88 on the ur-quattro.  The Big Red Bus (MY90) has one too.  They're
externally invisible - you can just see the edge of the plastic insert
with the intercooler feed hose removed.  The foam collects a bit of oil,
so I wash mine out whenever I have those hoses off.

--
 Phil Payne
 http://www.isham-research.freeserve.co.uk/quattro
 Phone +44 7785 302803   Fax: +44 7785 309674