[Gaz64]

The reason we run at 75-90% max power duty cycle is so the injector is just large enough for the engine to produce the desired max power.
No point in running excessively large injectors to try and get all of the fuel in at 30-40% duty cycle (typical inlet valve timing), since the idle fueling would be near uncontrollable.
I do like the idea of staged injection per cylinder, to have a small injector for idle low rpm, and a second high mounted injector for high rpm.