Drone-Free Mufflers?

http://www.dynomax.com/mufflers.php

Patrick

NoOp wrote:
> http://www.dynomax.com/mufflers.php
>
> Patrick
Interesting.......Does the back pressure change the resonance?

"GILL" > wrote in message
...
> NoOp wrote:
>> http://www.dynomax.com/mufflers.php
>>
>> Patrick
> Interesting.......Does the back pressure change the resonance?

shape and volume of muffler cause the resonance (include the connecting
pipes too, more of the front one)

Muffler has a spring in it!

DynoMax Valve Technology Mufflers feature an exclusive, precisely calibrated
internal valve that redirects exhaust flow, during cruising conditions, to
provide Drone-Free PerformanceT. Hammer the gas and the valve automatically
adjusts for maximum exhaust flow, delivering on-demand performance and a
deep, throaty drone-free sound.


still very loud, 1/2 of it is a glass pack.

"NoOp" > wrote in message
...
> http://www.dynomax.com/mufflers.php
>
> Patrick

Another short lived gadget.
I do not see moving spring loaded muffler parts dependable lasting a long
time. Plus how much throttle will it take to "turn the tunes on" ? Now a
electric motor / actuator valve would be another story. You would have a
loud / quiet switch.
I'll just live with the Pypes violators I'm running now.

--
John
'07 3 pedal GT