Bill,

If your EM2 has the same capabilities as the EM3 listed on Tracy's site with
air data and data logging, You could consider temporarily connecting the
pitot and static connections from it to the locations under the cowl.  This
would give you a record of differential pressure at 1 second intervals
during flight that you could review later.  You probably wouldn't be using
the air data from the EM2 to actually fly the plane anyway.

Steve Boese