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Old 03-15-2010, 02:00 PM   #22
Studly Adventurer
rufusswan's Avatar
Joined: Nov 2007
Location: Branson MO
Oddometer: 962
Interesting. Looks kinda lilke a cutaway of a Bose speaker. Exhaust 'tuning' is a bit of a black art, and the math is beyond me.

I do know that for each spark of the plug, there are two pressure waves exiting. One is the expanding gas, and the other is pure sound pressure, both of which move at two distinct speeds. Both of which utilize the available 'space' in different manners.
1971 BMW R75/5 Toaster LWB
1974 Honda CL200
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