How does increasing the size of injectors impact engine tuning?

Increasing the size of injectors directly impacts the amount of fuel delivered to the engine. Larger injectors can permit more fuel to be delivered, which can enhance engine performance, especially in applications that require additional power, such as racing or heavy towing. However, altering the fuel delivery system in this way requires careful calibration of the engine management system to ensure optimal performance and to prevent issues like engine flooding, misfires, or inefficient combustion.

When increasing the fuel delivery capability, it is essential to adjust other related parameters such as air-fuel ratio, ignition timing, and overall fuel map within the engine's control unit. Failing to recalibrate can lead to a host of performance problems. Therefore, while larger injectors can provide an advantage by allowing for more fuel, they necessitate corresponding adjustments in the engine management system to achieve the desired performance gains safely and effectively.