Posted for "Metcalfe, Lee, AIR" <Lee.Metcalfe@jocoks.com>:

Gary:

Thanks for the offer.  The challenge in laying out the ideal airbox is I
only have slightly more than an inch clearance between the throttle body
inlet face and the bottom of the cowl (actually the chin bubble or
whatever it's called).  The airbox I have now seems pretty optimal for
the situation, although it uses a flat filter at the downstream end of
the inlet duct where the duct is transitioning from round to
rectangular.  Removing the filter (foam) gives me about a .3 or .4 boost
in MAP at 3000', WOT, 2700 RPM, 190 KIAS.

Next time I have the cowl off (sometime between now and OSH) I'll get
some pix of my set-up for you.

Lee