What are the 2 tune up methods for big bore cummins Engines?

1. Timing Advance: This involves advancing the timing of the injection pump, allowing the fuel to enter the cylinders earlier. This can improve power and fuel efficiency, especially at higher loads. However, it can also lead to increased emissions and noise.

2. Fuel Adjustments: This involves increasing the amount of fuel delivered to the cylinders by adjusting the fuel screw or injection pump settings. This can also improve power and fuel efficiency, but it can also lead to increased smoke and higher exhaust gas temperatures.