Boost Pressure Calculator

Calculate the boost pressure required to achieve your target horsepower, with altitude and temperature corrections.

Target Horsepower

Base Horsepower (N/A)

Altitude (feet)

Ambient Temperature (°F)

Intercooler Efficiency (%)

Static Compression Ratio

Required Boost (PSI)

13.7

Required Boost (Bar)

0.95

Required Boost (kPa)

Power Increase Ratio

2.00x

Pressure Ratio

1.93

Atmospheric Pressure

14.70 psi

Compressor Outlet Temp

187°F

After Intercooler

110°F

Effective Compression

17.4:1

Detonation Risk

Moderate - Premium fuel recommended

Fuel Recommendation

93+ Octane Premium

Altitude Effect: Higher altitude means lower atmospheric pressure - more boost needed for same power
Temperature: Hotter air is less dense - requires more boost compensation
Effective CR: Boost multiplies effective compression ratio, increasing detonation risk
Safe Starting Point: Begin tuning at lower boost and work up while monitoring knock