An IFR cert does not look at indicated airspeed, youcan do that with a manometer (many easy to build ones on web sites) using a column of wter in a clear plastic tube. The IFR cert only looks at altimeter and encoder output, and transponder code and mode C.
Wow. Thanks for clarifying, Larry. Your suspicion or prediction was on target. I'm thinking this is not a worthwhile mod for my Rebel after all.
The ~8 MPH high IAS error is more than I'd like, and plumbing tests indicate everything is tight, so I'll experiment with a small angle positioned on the face of the static port "disk", just aft the port, as I've seen others have done, including Cessna on some of their recent vintage 172's.
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