RE: Why not a Webra engines thread?
Dave,
Who says no-one noticed the MVVS carburettor?
As to the fuel pressure issue with the Dynamix; the manual does state exhaust pressure can be used, however, experience of people that used this carburettor with the Webra #1024 and #1030F was that with exhaust pressure, you have no chance to land with the engine running...
The engine will invariably quit during flight, often during a pattern maneuver...
Using a Perry (or the then available Robart) pump made completing the pattern sequence possible...
Just to understand the difference in engineering, Dave, an MVVS #3219Q Quickie carburettor, despite its huge 9 mm bore, can run on venturi suction only; although exhaust pressure is recommended.
The smaller bore Dynamix requires pressure and the level provided by the exhaust is borderline...
It is simply not designed to run on venturi suction.