[s-cars] Exhausts

[Douglas Landaeta]

Well, I'd say, "it depends"... If you already have an RS2 sized turbo or
larger and RS2 sized injectors, there is a point at which the exhausting
from the motor does become a limiting factor. The exhaust is NOT a limiting
factor in Stage 1, 1+ type chip-mostly applications, I agree.

As perhaps noted, the AAN in an UrS4/6 is like a canvas to which each builds
there own custom configuration. In my case, I believe what I was told by Tim
McClean at NEA (my tuner). At the level I was pushing, I was limited by
exhaust flow and the Stromung pushed the final tune farther than was
otherwise possible.

I'm not a tuner, but I've tested various chipsets in my configuration and my
custom Dahlback work has a peak power and torque that I have not felt with
other (non-custom) chips. That feeling corresponds to a very turbulent
exhaust flow and a very deep-throaty sound from the Stromung. No other
tested chips pushed my exhaust to make that same "full" sound.

Caveat - I have no dyno or drag numbers to compare with, so I could be as
full of it as my Stromung.

carry on...

On Mon, Dec 7, 2009 at 4:57 PM, <djdawson2 at aol.com> wrote:

>  "...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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>
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