A old vehicle had regulator 3 bar for standard engine and 3.3 bar
> for supercharged engine. It was an odd-size part, and Bosch no longer make
> it. Maybe a few sitting in a warehouse in Germany.
> There is one third-party copy part, but only with 3.3 bar pressure.
> Presumably the higher pressure would go with different injectors and > ECU map.
Higher pressure = higher fuel flow at the injector nozzle. The 0.3 bar pressure increase would be related to improvements in volumetric efficiency, ie. airflow.
So if one put in standard engine, what would happen?
It would be rich over and above the mapping.
Perhaps it runs rich for a while, and will be trimmed back?
It's possible if the error is within the trim range.