Helmholtz chamber design differences?
 

Can anyone run a clinic on helmholtz design? I've seen designs from basic "j-pipes" to ones with large chambers on the end of the pipe.

I've also seen the diameter of the helmholtz pipe be equal to the main pipe, as well as pipes much skinner than the main pipe. Also have seen different shapes and sizes of the big chamber at the end of the pipe.

I know the basics of helmholtz, i.e., 1/4 wavelength cancelation, and choosing the correct length of piping for the number of cylinders and drone range. But don't know much about those big chambers and pipe diameter

Check out this thread - http://www.gt86.org.uk/forums/topic/...n-and-proving/

That's amazing...i wish I had an exhaust shop like that around

Two sources that helped me a lot were John Baechtel's "Practical Engine Airflow: Performance Theory and Application" and (surprisingly) one of the chapters from Jeff Hartman's "How to Tune and Modify Engine Management Systems".

A lot of the info from Hartman's book can be found at grapeaperacing.com

Applies equally to exhaust and intake systems. For exhaust systems, your primary pipes are equivalent to intake runners. From there, it's an easy translation.