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Fuel quantity map

Diesel Tuning Fundamentals

Discussion and questions related to the course Diesel Tuning Fundamentals

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can someone please explain the fuel quantity map and what effect they have. From what I understand the only way to get more fuel in is via rail pressure or physically opening the injectors longer so I don’t understand the fuel quantity maps and why I should adjust them

The fuel quantity map defines exactly what it's name implies - defines the quantity of fuel that will be delivered. Increasing the fuel pressure can increase the fuel delivery if the injector pulse width remains the same and this is a common hack that's used by a lot of the piggy back modules. With complete control over the factory calibration we can directly request more fuel with the fuel quantity table. We usually also increase the fuel pressure so that the injection timing and pulse width remain relatively similar to stock.