Results of CGT Exhaust Experiment

[Kneale Brownson]

I have "dual" glasspacks replacing the center muffler on my 200q20v, along
with the OEM rear silencer.  No obtrusive noise.

At 08:24 AM 05/13/2003 -0400, David wrote:
>Patient: 1987.5 CGT (NG engine otherwise stock). Proceidure: Cut out bad
>center muffer, replace with traditional glasspack. The rear muffler was
>already removed and replaced with pipe a while back. So now the only
>silencer is a glasspack.
>
>Results: FANTASTIC! Nice LOW rumble under 3,000 RPM, sounds like a
>screaming banche at higher RPMs at WOT. At highway cruising speeds, it is
>only somewhat intrusive, but not to the point of annoying me or people in
>surrounding cars. I did make a guy in a 5.0 look over to see what the
>noise was (was reving out at WOT). Also I noticed that the engine seems
>more willing to rev out. Before there seemed to be no real reason to rev
>past 5,000 RPMs. The engine just didn't seem to make any more power, just
>noise, beyond that point. Now, it revs much easier and seems to actually
>be making power up to 6,000 (have never pushed it past 6,000).
>
>The tone is perfect IMHO, but I would ultimately like to find a way to
>keep the same tone but lower the decibles. This exhaust project was
>"temporary" as I'm quite sure the whole system will need replacing in the
>next 6 months. The long term plan is to do a 2.5" cat back system, with
>glasspack AND rear muffler. I would think that by having the glasspack as
>the "resonator" and a traditional (high-flow?) rear muffer I should be
>able to keep the tone about the same, just quieter. Or at least that's
>what I hope will happen. Anybody care to comment on my plan?