[pbonsalb]

Then you are stuck. But my advice is not to waste your own money on the 750 and to instead save it for later when you have a more moddable car. It will be a nightmare trying to supercharge that car due to the tuning issues unless maybe you find some guy probably in Eastern Europe who has swapped in the particular ECU that ESS can tune, or you find someone who was able to fit a Hyde kit and was able to tune the ECU. You are not on a well trodden path like modding an E36. You can’t just buy some aftermarket programmable ECU because you will lose functionality and likely OBD2 plug in for inspections if that is done on your area. There are no plug and play ECU swaps for your car — it would be complex work.