There is a world of difference between mechanical Fuel Injection like the ME 109 had and Electronic Fuel Injection.
Mechanical injection does not have the need of an O2 sensor, Manifold Absolute Pressure sensor, Throttle position Sensor, Electronic Control Unit and so on.
While Mechanical is just that it utilizes a high pressure pump and injectors set to pop at a certain time and pressure
Granted the electronic is far more fuel efficient but we all got by with the Mechanical for years and years.

Anyway back to the engine at hand here, W/O and O2 sensor or ECU I can't see how it can operate properly. The early Holley Projection unit's didn't have an O2 sensor and the ECU got lost constantly it was a Major PITA to deal with.
I'll let someone else try this out for now and see how well it does work, Besides I like to tune my engine's myself anyway.