Stroke will be the same as a "long stroke" .21 buggy engine.

So, when I got out of the shower last night after coming home from a race, I had a little flash of an idea of how to use the crankcase to supercharge a 4 stroke engine. You could simply valve it with reed-valves. The intake charge would get sucked into the crankcase when the piston goes up, then pushed back out into a the intake manifold as the piston goes back down. This would happen twice as often as the intake stroke, so I'm guessing it could give a significant boost without adding more rotating parts. Of course, other types of valves could be used, but it's just a generic and random idea at this point.

Has anyone ever seen this used in any type of 4 stroke engine?