There really is no need to bastardise the scaling, the std sensor is fine, you just need to have external logging.
bastardise? i would think this would be how bosch does it for cars equipped with 3bar+ sensors. the overall scale is adjusted to match sensor. FF no longer = 2560. FF = 30xx mbar and thus every bit from 00 to FF represents a larger hPa value and requiring every map that references hPa to be rescaled or axis rescaled. No?
what if you want DV control for pressures above 2560?