The
RAX Patch is a custom patch developed by community member
Richard to enable a variety of quality of life and control improvement features on the Evo X / Ralliart. Full credit/attribution goes to him, the original forum links can be found
here.
RAX3: Atmospheric Boost Baro Compensation:
This patch makes it possible for the ECU to take BARO sensor readings into account when using Direct (psi-based) Boost Control. Typically, psi-based boost targets have been adjusted for atmospheric pressure via a fixed value, usually named Atmospheric Boost. With this patch enabled and the Atmospheric Boost constant set to 0, the ECU will adjust its psi-based boost targets using the BARO sensor reading. This enables the ECU to take into account atmospheric pressures at different altitudes. Support for both 3Bar and OMNI4bar MAP Sensors.
Installation Instructions for the RAX Patch can be found
HERE