Now you can have the ultimate exhaust performance
and sound for your BMW without the intrusive in-cabin resonance found
in other aftermarket exhaust systems. UUC's TSE3 augmented with CORSA Performance technology delivers The Best
Sound Around™ with RSC™ muffler technology, engineered
to increase performance and eliminate annoying interior exhaust noise.
CORSA Redefines
Exhaust Technology
The exclusive, patented RSC™
muffler design delivers the throaty exhaust tones that define your performance
BMW on the open road. But inside, you will experience the quiet ride,
that until now, you've only dreamed about.
CORSA has now made it possible with RSC™ - Reflective Sound
Cancellation™ technology - using aeronautical and space age noise-suppression
technology. Sound waves are reflected within the muffler case, producing
a cancellation wave effect - with no flow restriction and without electronic
devices!
The RSC™ muffler design features a pipe running straight through
the muffler that incorporates a full 360-degree air gap that allows sound
pressure waves to escape. The waves are channeled and then returned to the
gap 180 degrees out of phase, canceling specific sound frequencies. All
that remains is the clean, crisp sound of performance.
CORSA
Performance
Reflective Sound-Cancellation™ (RSC™) Muffler Technology
Automobile
makers have been building mufflers for more than 100 years, and as the
name muffler implies, the primary purpose of the muffler is to reduce
noise emitted by the internal combustion engine. Muffler technology hasn't
changed very much over the past 100 years. The exhaust is passed through
a series of various-sized chambers in reactive-type mufflers, or straight
through a perforated pipe wrapped with sound deadening material in an
absorption-type muffler. Both types of mufflers have strengths and weaknesses.
The reactive-type muffler is usually restrictive and prevents even the
"good" engine sounds from coming through, but does a good job
of reducing noise. On the other hand, most absorption-type mufflers are
less restrictive, but allow too much engine noise to come through, especially
at cruising speeds. And regardless of the packing material, absorption-type
mufflers tend to get noisier with age.
More recently, automotive engineers have been experimenting with electronic
noise suppression mufflers. A sound pressure wave 180 degrees out-of-phase
is generated by an electronic device to cancel out a similar sound wave
generated by the engine. It is an effective way of canceling noise without
restricting flow. Unfortunately it is too costly and currently impractical
for today's production vehicles. However, out-of-phase sound wave cancellation
is the best technology to control engine noise.
CORSA's patented RSC™ technology reflects sound pressure
waves within the muffler case to produce the same 180 degree out-of-phase
wave cancellation effect, without flow restriction or electronic devices.
It literally took the proverbial "rocket scientist" to come
up with the design. An aeronautical engineer, with years of fluid flow,
gas dynamics, thermodynamics, and acoustics experience on NASA and numerous
other government projects, was employed to adapt some of this space-age
noise-suppression technology to automotive mufflers. The result is the
CORSA * Reflective Sound-Cancellation™ Technology.
When you refer to the above illustration, you will
see an elegant design in simplicity, theory, and operation. Essentially,
the RSC™ muffler design includes a pipe that runs straight through
the muffler, almost as if there was no muffler in the system. However, in
this straight through-pipe, there is a full 360-degree air gap that allows
sound pressure waves to escape and travel down a channel. These waves are
reflected back to the air gap where they arrive 180 degrees out-of-phase
and cancels that particular sound frequency. Each CORSA RSC™
muffler cancels up to three primary resonance-producing sound frequencies.
All that remains is the clean crisp sound of a healthy performance engine.
This technology enables CORSA engineers to tune each muffler to a specific
vehicle by adjusting the size of the 360-degree air gap and the length
of the pulse channels within the muffler for the best sound and least
interior resonance. Initially, muffler design can be calculated using
exacting acoustic and thermodynamic formulas. The final design specs are
arrived at by using Real Time Spectrum Analysis equipment to analyze "real"
sound at idle, acceleration, and cruise.
Once internal and external dimensions have been established for a specific
vehicle, mufflers and exhaust systems are fabricated out of 100 percent
stainless steel at CORSA's new 40,000-square-foot manufacturing facility
in Berea, Ohio. The manufacturing process includes state-of-the-art equipment
plasma, TIG welding, and hydroforming equipment. CORSA's RSC™ exhaust systems are resistant to corrosion and able to withstand
high temperatures for long periods, enabling CORSA to offer a limited
lifetime warranty - guaranteed to the original owner, against rust-through
and corrosion, for as long as they own their vehicle.
As good as this theory sounds, what is really important is real-world
performance. How good is it? It works the way a high-performance
muffler really should...the amount of sound produced is directly proportional
to the amount of throttle used. CORSA exhaust systems have been best described
as "awesome sound at full-throttle and whisper-quiet cruise."
It's rare that any company invents a better "mousetrap"
in an industry that has evolved over 100 years. But CORSA Performance
is convinced, as are its satisfied customers, that no other high-performance
muffler can compare to its RSC™ systems. As car enthusiasts
get to hear the unique sound and experience the performance these mufflers
deliver, this technology will be the standard of quality for performance
mufflers in the future.
RSC™ Technology - U.S. Patent # 5,952,625; 6,199,658; other patents pending
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2004 CORSA Performance
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