Date: Mon, 5 Jul 1999 16:59:21 +0000
From: "Carl Buckland" <buckland_at_mail.xmission.com>
Subject: [E36M3] 100db Exhaust
I thought I would weigh into this "which muffler is best"
thread. well, it isn't just about "what sounds best," but
what FLOWS best. My friend Boyd Butler, who builds
exhaust systems for nearly every one of the NASCAR teams,
did some flow tests a few years ago, and came up with some
surprising results: The Supersprint, although much quieter
than the B&B or the Dynaflow (or a couple of other so called
hi-performance mufflers), flowed better. That, to me, is the main
Now, as for sound. The continuous DIAMETER of the exhaust system
is going to effect the overall sound as much as anything. Big diam.
piping makes for a much deeper, throatier sound. It may also affect
the torque curve, but this is something about which I have no
data. I can only say that our car, with very large diameter
Supersprint headers, Dr. Gas Syncronizing Crossover Pipes, and
Supersprint muffler, has a very throaty sound, that is distinctive
from any other BMW that I have heard. Want a big sound that doesn't
make you deaf? Try Supersprint from tip-to-tail.
Want a REALLY load sound? Try the above, but when you are at a track
that allows for it, remove your muffler altogether. Now THAT is
loud! I don't know if the car really ran any stronger, but it sure
sounded ferrocious, and when you are in tight quarters, fighting for
a corner, size (of your bark) does make a difference. I had guys in
very loud Porsches tell me that they could hear my car from way off.
It only takes a few minutes of work, and it is fun, but wear your
earplugs; I suspect that the Dbs are in the 100 range.
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