Expansion Chamber and exhaust

I think there is an optimum length to the expansion chamber for your pipe. Isn't there some formula for 2 strokes? I seem to remember one (going into the "Way-back machine" for a bit).
 
the video..

the video is no good anymore on youtube please repost new site cuz i am into building my own silent exhaust... please i will post a video soon of how quiet it is ...
 
Ok i will see what i can put together for you guys tonight.

sorry the videos are down.
 
We used the click and build software.
Not sure it's really the greatest.

Anyway i wrote an excell spreadsheet to do all the math for you.
And with this free cone builder software you can get the patterns for the pieces.

I have this on a disk and i'll post some stuff later.
 
That was just one link I could think of off the top of my head. There are more. Punch in expansion chamber and you find many more links to chose from.
 
4 sure you are correct.
The good software cost a few hundred bucks.

I guess i enjoy the math.

My spreadsheets are just as effictive and requires basic imput
 
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