SBP Expansion Chamber Questions

[350zdrftr]

from my little knowledge about gasoline engines you would want the exhaust gases to escape as easily as possible , the stock design works well in my opinion because it's a fairly simple design . I think removing the baffle would help open it and allow it to escape enough and drill a few holes in the bottom and it would equal performance of an expensive tuned pipe

 

[Ghost0]

In case of a 4 stroke you are correct but a 2 stroke is a different animal. Because a 2 stroke does not have intake and exhaust valves they have difficulty pulling fuel/air in and also allowing unburnt gasses out the exhaust. An expansion chamber pipe uses the sound waves created by the exhaust traveling though the expansion chamber to assist in pulling a fresh charge of fuel/air and will also help close the exhaust port not allowing unburnt gasses to escape increasing the useable charge in the combustion chamber. Hands down the expansion chamber is the best method of bolt on performance you can get for a 2 stroke engine.

 

[Pablo]

from my little knowledge about gasoline engines you would want the exhaust gases to escape as easily as possible , the stock design works well in my opinion because it's a fairly simple design . I think removing the baffle would help open it and allow it to escape enough and drill a few holes in the bottom and it would equal performance of an expensive tuned pipe

This shows the concept pretty well.

http://www.southernskies.net/page_info/runningtwostrokeengine.html

Relatively speaking our pipe is simply not that expensive.