Boost Pressure Calculator
Calculate absolute pressure, density ratio, and estimated power gain from boost pressure in PSI or BAR.
How It Works
Enter boost pressure and atmospheric pressure. The calculator computes absolute pressure, pressure ratio, air density increase, and estimated power multiplier compared to naturally aspirated.
Formula
Absolute Pressure = Atmospheric (14.7 psi) + Boost Pressure
Frequently Asked Questions
How much power does boost add?
Each pound of boost adds roughly 3-4% more power on a typical gasoline engine. Exact gains depend on intercooler efficiency, engine tune, fuel octane, and how the engine was built.
What boost pressure is safe for a stock engine?
Most factory turbo engines can handle 5-10 PSI over stock boost levels with proper fueling and tuning. Exceeding stock levels significantly typically requires upgraded internals, intercoolers, and fuel systems.