Cylinder Fuel Trims

Cylinder trims are used to apply fine fuel corrections on a per-cylinder basis in order to improve combustion balance across all cylinders. Even in well-calibrated engines, small differences in airflow distribution, injector flow characteristics, and combustion efficiency can result in uneven cylinder operation.

Typical reasons for using cylinder trims include:

  • Balancing EGT distribution across all cylinders to reduce thermal stress
  • Correcting minor airflow or volumetric efficiency differences between cylinders
  • Compensating for injector flow variation or ageing effects
  • Improving overall engine smoothness and combustion consistency
  • Reducing the risk of individual cylinders running lean or rich under load

Cylinder trims can be enabled per cylinder and provide a ± fuel mass percentage correction via a 3D table.

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Table Control

Cylinder Trims are enabled from Fuel -> Cylinder Fuel Trims -> Cylinder Trim Table Control

OFF – The Trim Table is Off
ON - The Trim Table is On

Each trim table will appear individually under Fuel -> Cylinder Fuel Trims