Think about the operating conditions of piston aircraft engines,even during cruising,the engine is devoloping 70-80 percent of it's full power rating which is at a low RPM range as compared to automotive engines.And I would imagine any aircraft carb parts are brutally expensive.
When engines such as Corvair,Suburu etc are converted for experimental aircraft,what carb do they use?
You might better take a look at variable venturi vacuum controlled carburetors(constant velocity) such as SU,or Japanese bike carbs.
