nomorecatering as it currently stands I can run my IO550b at 49lph with just gamijectors and an EDM700 and a modicum of thought.
The system you're talking about might add 20k to the cost of the engine to save what...1 or 2 lph?
Non Diesel GA FADEC has thus far been a big flop because it costs LOTS and delivers **** all...diesel has been a bigger flop for the same reasons.
There are reasons why aircraft engine technology has only crept forward in baby steps in the last 65 years - and most of those baby steps have been metallurgical rather than technological - it has to do with 1/. economies of scale and 2/. the current technology is bloody good.
How many car engines pull several hundred HP continuously?