[s-cars] Noisy Stromung in the rain

[jeff posto]

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[ Picked text/plain from multipart/alternative ]
This is the first time I am hearing such a report in the 3 years I've been =
in the Stromung GP scene.

I think Taka and Scott have some useful ideas to check.  What is the condit=
ion of the gaskets at the 4 mating surfaces? (DP to turbo, wastegate pipe t=
o WG, DP to center, center section to rear muffler)

Stromung does report that the stainless steel will expand (hot) and contrac=
t (cold) to some degree. Given that, chassis clearance becomes really impor=
tant.

Best way to set it up is on a lift, loosen all bolts and adjust it so there=
 is not chassis interference. Some installers place a temporary shim to ret=
ain a fixed position down the length of the system.
(Remember the hangers are flat stainless steel and can be bent slightly to =
adjust the Up/Down location of the rear sections. )

Then starting from front to back tighten each bolt gradually. Snug each bol=
t initially then return for a final tightening sequence.

HTH
Jeff Posto

QSHIPQ at aol.com wrote:
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First, make sure the front heat shield is installed (between exhaust and
driveshaft). This is a common problem with big exhausts that are close to
spinning driveshafts. With all shields installed on an S car, haven't exper=
ienced it
yet, but had it all the time in my 5ktqw with 3in exhaust, and occasionally
with my urq as well.

HTH

Scott J
In a message dated 9/24/2003 12:10:31 AM Central Daylight Time,
gailus at mindspring.com writes:

Just a guess, but there could be a cracked weld that opens up
when you've got larger temperature differentials between portions
of the exhaust system (those areas splashed with water will be cooler
and therefore not expand as much).
You might want to check the weld attaching the small pipe going to
the wastegate. I recall that someone else on the list had a problem
there before.

Paul


----- Original Message -----
From: otw185
To:
Sent: Tuesday, September 23, 2003 2:29 PM
Subject: [s-cars] Noisy Stromung in the rain


>Not that it ever rains in Columbus, OH, but anyone
>have a theory on why the Stromung exhaust on my 92
>suddenly gets LOUD when driving through heavy-rain
>soaked roads? Turbo also whistles louder on any
>slight throttle responses (did it with the K24 and the
>current RS2). During these episodes, I can feel a
>little decrease in power available. Never, ever did
>it loud in the rain. Capital LOUD.
>
>Exhaust and turbo noise abates immediately as soon as
>road conditions dry out.
>
>Not that it matters, Turbo, O2 sensor, EM and all
>gaskets are brand new (had the rain noise before and
>after these changes). Nothing seems to be out of
>order when conditions are dry.
>
>Scott Schultz

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