Paul, others.

A novel thought.  Test and confirm air flow of the air box, P-ports,
manifolds and throttles component by component BEFORE assembling them on
the engine.

Here is a forum of people making DIY flow benches.
http://www.flowbenchtech.com

Another ingenious and simple device using several MAP sensors to create a
digital manometer interfaced to a computer is on the following U-tube.
Perhaps a MAF sensor could do the same?

http://www.youtube.com/watch?v=Ydtvb5nZBLg

The circuit board to make the device can be purchased from Bruce at this
forum http://www.flowbenchtech.com

In operation air condition the room that has the flow bench to maintain
standard temp and humidity for consistent results.  After component
testing assembly the MAF with the intake system and test again with the
knowledge of where flow restrictions are occurring.

Tsu Rong in Japan