FI engines benefit greatly from short, fat runners. It is easier to flow more pressurized air like that.

The theory you are talking about has been applied to some cars already, the first that comes to mind is the VDI system used in 89-91 (Series 5) N/A RX-7's. It generated about a pound and a half of "boost" at high RPM's by redirecting the pressure waves from one rotor intake port to the other.

I don't see any purpose with even trying this on a supercharged car, I don't think it will work out like you think, plus you would have to design and fabricate a new manifold that would actually create the effect. Not an easy task.