100 Octane
BMW X3M F97 MHD OTS Stage 2 98ron
Vehicle configuration:
- Mileage: 40,000 km
- New OEM spark plugs
- Eventuri intake
- OPF deleted
- Downpipes with sport catalytic converters
- TCU: xHP Stage 2
- Fuel: Shell 100 RON (E5)
We used the MHD Stage 2 98 RON OTS map for testing. In the logs, there is significant ignition retard and severe underboost. The file was tested on a dyno, where the car produced 646 hp.
Later, we added some ethanol to the fuel for further testing. With E20 fuel, ignition retard dropped to zero, and the dyno result increased to 700 hp.