How important is the calibration of the engine management system when changing injector sizes?

The calibration of the engine management system is crucial when changing injector sizes because it directly influences the engine's air-fuel mixture and overall performance. When the size of the injectors is altered, it changes the volume of fuel delivered to the engine. Without recalibrating the engine management system to account for these new flow rates, the engine may not receive the correct air-fuel mixture for optimal combustion. This can lead to a variety of issues including poor engine performance, increased emissions, and potential engine damage due to running too lean or too rich.

Proper calibration ensures that the engine receives the appropriate amount of fuel, maintaining efficient combustion, proper power output, and overall engine longevity. Therefore, when modifying injector sizes, calibration should be regarded as a critical step in the maintenance and tuning process.