[s-cars] Exhausts

Mon Dec 7 14:34:57 PST 2009

 Yes, I have done it myself... Stromung vs. OE. vs. open downpipe on a car that was typically making about 355whp.

OE was the clear winner in torque throughout the entire range over both an open DP and the Stromung.

Open downpipe won in peak hp, but only by 3whp.  OE still won in hp area under the curve.

Stromung didn't win in any test, peak hp or torque, or total area under the curve.  It did have a few points in the range where it bumped above the other 2 options, but from a purely scientific perspective, it did not prove to be a good option.

Power aside, it weighs a ton less, and is much easier to work around underneath the car.  And, of course, it does sound very nice.

Dave

-----Original Message-----
From: pmische <pmische at comcast.net>
To: djdawson2 at aol.com; dlandaeta at gmail.com; alexander_witham at yahoo.com
Cc: s-car-list at audifans.com
Sent: Mon, Dec 7, 2009 3:16 pm
Subject: RE: [s-cars] Exhausts

Has anyone actually done a Stromuuuung v. OEM back-to-back on the dyno?  I'd
love to see the data.  

I will say the Stromung does seem to deliver better throttle response (hard
to measure that), and there's that unbeatable, unquestionable sonorous
mellifluousity...

PJM

-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com] On Behalf Of djdawson2 at aol.com
Sent: Monday, December 07, 2009 4:58 PM
To: dlandaeta at gmail.com; alexander_witham at yahoo.com
Cc: s-car-list at audifans.com
Subject: Re: [s-cars] Exhausts

"...and allows for 'real' tuning that requires moving a lot of exhaust
- of course, it's nice to move a lot of air on the intake side as well!"

Just to be clear... an exhaust like the Stromung, while they do sound very
nice, is certainly not required to do "real" tuning or to extract big
horsepower from the I-5 20v engine.  Dyno tests have proven on more than a
few occasions that the OE exhaust is not limiting power output, and
installing an aftermarket unit does not improve power output.  That is fact.

What you are buying is a cool sound, less weight, and fewer parts.

Dave

-----Original Message-----
From: Douglas Landaeta <dlandaeta at gmail.com>
To: alexander witham <alexander_witham at yahoo.com>
Cc: s-car-list at audifans.com
Sent: Mon, Dec 7, 2009 1:59 pm
Subject: Re: [s-cars] Exhausts

Alexander,

Stromung. Nice quiet low thudding on idle in a confined space, (rattles old
house windows from the driveway) but cruises very quietly, until full
throttle boosts just open up and create a low throaty roar that is
uncomparable for an Audi - almost P-car like. The tuning of the sound is
excellent and allows for 'real' tuning that requires moving a lot of exhaust
- of course, it's nice to move a lot of air on the intake side as well! Do
the bigger turbo as a package and your 'tuner' can customize chips to pull
all the performance out of the package. 'll let others describe ther
versions - Mine's from 2004 or '05, generation IV, I think.
Yes, the lower attaching bracket is broken at the weld joint, but it gives
me no trouble and I hear that the latest version with a flex pipe has fixed
that issue.

Doug
94 'S4 rolling over 25k miles on the Stromung

On Mon, Dec 7, 2009 at 3:29 PM, alexander witham <alexander_witham at yahoo.com
> wrote:

> Hi all,
>
> So, I just picked up another UrS6 and I love it. I'd been toying with the
> notion of doing exhaust on my previous 2 UrS cars and looked into it
pretty
> seriously before backing off due to financial constraints.
>
> Well, the urge is back and I thought I would pick your brains as to what
> the best course of action is. In case it's relevant, the car is currently
> equipped with K&N, MTM Stage +, and RS2 exhaust manifold.
>
> I'm looking for a pretty aggressive sound that's really going to bring out
> the I5's bark. But I don't want that highway droning that's so common with
> aftermarket systems.
>
> So what do you folks recommend?
>
> Thanks,
>
> Alex
>
>
>
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