Hi,
Crusty is right. Super charged two strokes like the detroit desiel don't use the case to pump the charge. They force the charge into the chamber through a valve like a four stroke. This allows many cylinders to fire at different times. When I was a kid we mounted a dental drill onto a Fox 15 to supercharge it. The pressure in the case got so high that the combustion migrated to the crank case. A Day Cycle two stroke like we use doesn't seal the combustion chamber completly during combustion like a four stroke. It is more of a continous flow through the engine. Needless to say the bottom of the case blew off. We were lucky that we didn't get hurt. It all happened very quickly. This was almost fifty years ago. We did a lot of wild experiments. We had crank shafts fly apart inflight long before DA thought of it. LOL It is good to see that you are using your imagination. Thats were great things come from.

Enjoy, Dave