Re:A4 whine at speed and remote locking

[steve@ipecac.engr.sgi.com (Steve Valin)]

Tom Lazay <tlazay@ultranet.com> sez:

> YES!!! I can hear a resonating whistle sound at exactly 3000 RPM in 4th and
> 5th gear. It gets louder if you accelerate through this zone, and then
> disappears when the RPMS hit 3100. My guess is that there is some resonance
> either in the air-intake or the exhaust. The sound is very hard to locate.
> Has anyone else heard this?

My '93 100CSQ also does this at around 3000 RPM.  I've always attributed
it to something resonant in the intake runners.  It's interesting that the
A4 does it, too, which I would think would have a different exhaust setup
but the same intake system.

-steve