center resonator -- Re: [s-cars] Stromung questions, specifically cats vs...

[DGraber460 at aol.com]

In a message dated 3/29/2005 1:18:04 P.M. Mountain Standard Time,  
clancybill at yahoo.com writes:

I've  been struggling for a year trying to find an affordable replacement
exhaust  system, and after having chosen Stebro, I have spent more time
trying to  fix the sound problem with it.    Recently I have made plans  to
swap it out again, this time with someone's OEM exhaust.

So...  after some mild frustration dealing with the cost of new or the noise
of an  aftermarket, I have to ask the question:

What's the BFD with the S-Car  exhaust?

Factory Cats for $950.00 each?
Center muffler  $700.00
Rear muffler $350.00
pipes 100.00's more

It's just a  passenger car with a 2.2 turbo...   ;-|    There's only so  much
exhaust that needs to get thru that thing.   And what is the  purpose of
having two mufflers instead of one?




-----  Original Message -----
From: "James Bowes"  <thermobob at hotmail.com>
To: "Taka Mizutani"  <t44tqtro at gmail.com>
Cc: <s-car-list at audifans.com>
Sent:  Tuesday, March 29, 2005 6:16 AM
Subject: Re: [s-cars] Stromung questions,  specifically cats vs straight pipe


Got rid of the drone completely  last night. I went to a friend who works at
a Meineke, and he welded in the  new center resonator. We also put in the
cat. I figured that I'd already  heard the noisiest the system would be (no
cat, smaller resonator), now I  wanted to hear the quietest it would be. When
I head to the track next,  I'll put in the test pipe and see what the middle
ground would be. I have  to get my car registered in TN, so it's better to
have the cat in for that  :)

Results are that I actually wish it was a bit louder. Performance  has gone
down a bunch as well. When I had it in the original setup, the  boost
threshold and the lag were both lower, and the car felt like it had a  lot
more balls. I'm sure a lot of that was the noise, which made the car  'feel'
more powerful.

Anyways, problem solved! Now that I've  determined that the first setup was
way too loud and that the second is a  touch too quiet, I get to tweak
things! yeah!


----- Original  Message -----
From: "Taka Mizutani" <t44tqtro at gmail.com>
To:  "James Bowes" <thermobob at hotmail.com>
Cc:  <s-car-list at audifans.com>
Sent: Monday, March 28, 2005 9:50  PM
Subject: Re: [s-cars] Stromung questions, specifically cats vs straight  pipe


> James-
> I don't know how different Gen 2 was vs.  Gen 1, but I had the Gen 1
> (had the bigger resonator, definitely not a  Borla XR-1). The drone was
> bad between about  2400-3100rpm.
>
> I got a Gen 3 rear section from Scott at  Stromung- pretty much
> eliminated the drone. This was in a '91 200q, so  your S6 should be a
> lot better- much more sound insulation. I've been  in S cars with the
> Gen 3 and it's really nice and quiet, no  drone.
>
> The cat will reduce noise levels, but will not kill the  drone- the Gen
> 3 bigger rear muffler really helped in that  regard.
>
> Taka
>
>
> On Sun, 27 Mar 2005  21:25:02 -0600, James Bowes <thermobob at hotmail.com>
wrote:
>  > Real quick background, just installed my Gen 2 Stromung on my 95.5  S6
Avant.
> > Workmanship was awesome. I have the smaller center  resonator and am
running
> > the straight pipe, and the noise is  really bad. It's what I believe is
> > referred to as 'droning'.  Pretty much at all speeds/rpm's. Seems to be
in
> > mostly the  midrange. I have the Magnaflow resonator that Stromung sent
out
>  > to address this issue, and I'm having it welded into place  tomorrow
after
> > work. I hope this solves the 'buzzing', as I  sound like a damn rice-boy.
> >
> > Anyways, here's my  question... What will installing the cat converter in
> > place of  the straight pipe yield in terms of performance and sound? Yes
yes
>  > yes I'm concerned about the environment, so we'll leave that out of  it
for
> > now please. First off, how much does the cat help with  the noise level,
and
> > which frequencies would see the most  dampening? Second, does the cat
affect
> > the performance much?  How so?
> >
> > I'm tempted to leave the straight pipe in  and get the new resonator, but
> > I've spent a lot of time rolling  around under the car this weekend and I
> > want to be done with it.  Fiancee is getting pissed.
> >
> > Thx in advance
>  > _______________________________________________
> > 


What are you going to do with the noisy Stebro?
 
Dennis
Denver