Didn't mean to sound so rude there, sorry.
What I see as the biggest problems with VICS is the air needs first to make a tight turn; almost backwards into the chamber though there might be some resonance boost benefits though this. Then at the chamber, the flow must change direction to sideways motion, and there are other ports to disrupt the flow. Finally, the flow must make another tight change of direction heading back into open valve.
Also each port has to breath two ways and finally the chamber is somewhat tight, so there's lot of velocity to make things worse. The ports cannot be radiused on stock because that would create even greater disturbances in the flow out and over the port (and also it'd be quite expensive).
Thus in it's natural state I consider it more a balance between performance and labor costs, something that doesn't apply to project builds as much
