Gordon Jennings: Do you really want to know about expansion chambers?

Do you really want to know about expansion chambers? is a 2-part article written by Gordon Jennings, who is one of the best technical authors in the two stroke community and the author of Two-Stroke Tuner's Handbook. It covers all the calculations and the formulas that are involved in the designing of an expansion chamber exhaust. In addition to that, the modifications required to the engine and the other factors that need to be considered are also covered.

The article can be downloaded here free of cost.