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FWIW...GDI (gasoline direct injection) was developed/proven in WWII aircraft engines...by both German and USA manufacturers.
...the Curtis-Wright R3350 (3300 hp @ 2900 rpm) turbo-compound engines on our Lockheed EC-121's used fuel injection system and 115/145 octane AVGAS and was one of the most fuel-efficient (BSFC) propellor engines made.
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