SpeedNeeds Tool
Boost-Referenced Fuel Pressure Calculator
Shows how boost raises rail pressure, reduces pump headroom, and changes injector differential pressure.
What this means (plain English)
Boost-referenced regulators raise rail pressure to keep injector dP stable. That helps fueling consistency, but higher pressure reduces pump flow.
Notes and Formulas
- Effective Boost (MAP mode) = max(0, MAP - 14.7)
- Rail Pressure = Base + (Boost x Regulator Ratio)
- Injector dP = Rail - Boost (explained)