That is something that is easier explained with a visual drawing or simulation so you can better visualize what is happening. I'll see if I can draw it up in a CAD model so you can see what is taking place.
But just to give you something to be thinking on while I do that, if you were to place an open chamber head on the tiny bore of the 194 engine, the chamber would overlap and the deck surface and the incoming airflow would hit the top of the block deck before it could even reach into the cylinder, greatly impeding and restricting the flow.
