View Single Post
Old 10-14-2011, 07:48 PM   #3
Topless
Track rat
 
Topless's Avatar
 
Join Date: Nov 2006
Location: Southern ID
Posts: 3,701
Garage
Quote:
Originally Posted by blue2000s View Post
Resonance occurs when the exhaust pulses match the frequency of the return pulses within the muffler. It isn't a resonance of the muffler itself where changing it's mass will help. It's all internal to the muffler and external wrap won't help.
+1 The resonant frequency is determined by the length, diameter, volume, and internal design of the exhaust system. It's a lot like a musical instrument. You could attempt to mute a trumpet by wrapping but it wouldn't do any good either. Now put a mute in the bell and you change the resonant frequency. If you could interconnect the separate mufflers to get wave cancellation at 3k hz... sort of like a stock one. That would work.
__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
Topless is offline   Reply With Quote