Boost Horsepower Calculator

All misc tools

Calculate horsepower gains from forced induction (turbo/supercharger).

Engine Inputs

Base Hp Label

Horsepower without boost

Boost Label

Pounds per Square Inch

Results Title

New Hp336 HPTheoretical engine output

Hp Gain+136Horsepower added

Increase68.0%Power percentage gain

Real-World Note

This calculation assumes 100% adiabatic efficiency and perfect intercooling. Actual gains are typically 15-20% lower due to heat and mechanical losses.

About this calculator

Overview

Forced induction increases engine power by forcing more air into the combustion chamber. Turbochargers use exhaust gases; superchargers are belt-driven. Understanding boost pressure helps estimate horsepower gains and engine stress.

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Pro Tips

Compression ratio needs to be lowered for high boost applications to prevent 'knock'.
Intercoolers are crucial to keep the air-fuel mixture cool and dense.
Fun Fact
Did you know? Every 1 PSI of boost is roughly equivalent to a 6-7% increase in engine power.

Fun Facts

Formula: HP Gain = Stock HP × (Boost Pressure / 14.7) × Efficiency Factor