Turbo Boost HP Gain Calculator
Estimate horsepower gain from turbocharging based on boost pressure, engine displacement, and efficiency. Plan your forced induction build.
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How It Works
Turbochargers compress intake air to force more into the engine, proportionally increasing power. At 14.7 PSI atmospheric pressure, 8 PSI boost theoretically adds 54% more air (and power), but turbo efficiency losses reduce actual gains to 30-40%. Intercoolers reduce compressed air temperature by 50-70%, improving power and reliability. Higher boost requires stronger internals — most stock engines safely handle 6-10 PSI. Tuning the fuel and ignition maps is essential for reliability.