Thanks, LML!  I appreciate your help with the question of the orientation of the sonic venturi.  I've sketched a longitudinal cross-section of my sonic venturi (attached) and indicated the direction of flow, as I understand it.  If this is correct, then the venturis were installed backwards.  I will change them around.

Barry Knotts
LIV-P, Conti TSIO-550, Perrysburg, Ohio


Craig Berland wrote:

The diverging cone section is the flow outlet of the sonic nozzle.

Craig Berland