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Boost Estimator
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HP + Boost = New HP
HP + BOOST β ESTIMATED NEW HP
Rule-of-thumb estimate using pressure ratio + efficiency factor (quick bench racing)
Base horsepower (NA or current HP)
Boost value
Boost unit
PSI
kPa (gauge)
Atmospheric pressure
Sea level (14.7 psi)
~5,000 ft (13.2 psi)
~8,000 ft (12.2 psi)
Custom
Custom atm (psi)
Efficiency / real-world factor (0.70β1.00 typical)
Fuel / setup preset
Pump gas (safe) ~0.80
Intercooled street ~0.85
Good intercooler / E85 ~0.90
Dialed setup ~0.95
Custom (use box)
Calculate
Estimated new HP
β
HP Gain
β
Multiplier
β
π€
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