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Basic N54 Tuning

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M.A.P. Based – The N54 is a M.A.P. based system.

DME – The DME (Digital Motor Electronics) is BMW's term for what is commonly known as the “ECU”
or “ECM”.

Bank 1 / Bank 2 – BMW uses this terminology to describe the front three and rear three cylinders.
Bank 1 being the front three cylinders and Bank 2 being the rear three cylinders.

Closed-Loop Operation – BMW's DME operates in a constant closed-loop state, constantly
utilizing the A/F values in its tables and making adjustments via its equipped wide-band O2 sensors.

Boost Control – The BMW DME does not target boost but rather engine load. Engine load is
calculated based on pedal position, air flow/boost and RPM.

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