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Re: Turbo whine?

I have an *extremely* loud turbo on my car. It was the same loud with the
original turbo, too. I love it. Anyhow, I suspect that the cause is the
natural frequency of my turbo @.9-1.1 bar resonating through a less than
solid exhaust. I could hear some of the whine from the front and some
through the rear muffler.

*Steve                                       Sachelle Babbar
*'84  5ksT 1.6-2.0 bar                    <SBABBAR@IRIS.NYIT.EDU>
*Cockpit adjustable wastegate, AudiSport badge
*Disclaimer:"Any information contained herein is based purely on my own
*personal experience and may not necessarily reflect yours. Use caution as
*your results may vary from mine."

On Thu, 26 Mar 1998, Frank Amoroso wrote:

> Greetings all,
> I'm getting an intermittent whine while on boost on the '93 S4. It is a high
> pitched whine that increases in intensity (slightly) as boost increases. I
> have not been able to isolate where the noise is coming from, as well it
> happens under most ambient conditions. I don't seem to lose any boost as I
> get he same readings on the VDO gauge whether the car is whining (no pun) or
> not.
> Not terribly annoying, I would, however, like to know if this is the death
> knell for something under hood. Any BTDT's? I did a vacuum test, with no
> leaking in the vacuum hose system.
>             TIA
>             Frank--