ORIGINAL: Antique
And I found turning the 3W venturi so air is forced in got 200 more rpm....On my test stand...Twin cylinder pusher drone engines have the carbs facing forward..there's a tube in the venturi at a 45 degree angle that leads to the cover over the metering diaphragm..No other holes in the cover...Works very well in that application....
Experimented with rotating the 3w snorkel on aft mounted 106's used with "drones" in 2005 and had the same results. Instant rpm boost.
EFI has already been done on our size engines, used for long duration applications. You can't afford them. Re-phrase that, maybe one gas engine buyer in 5,000 might consider it but would not justify the increase in engine cost. Try adding over $2,000.00 to the cost of any engine so equipped. People don't like paying more that $300.00 to $700.00 for engines between 26 and 112cc's so they would scream bloody murder when they came up against the cost of an injected engine. Those making them have no reason to lower the price below production costs and are not letting the design technology out of house. I can't fault them at all.