As I understand, that when a port goes sonic you need to keep the intake open longer. Does this mean if you close the intake later you can turn more RPM without going choke and lose any power?
As an example: On a 292 chevy with a 2 sq.in.choke area on the intake port the engine will go "mach" at 5500 RPM.
What additional duration do you want and should the exhaust duration follow this increase ?
In fact using this port area what should the cam specifications be for this engine for max performance, the controlling factor being the intake port?
