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Boost to HP Formula:
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The Boost to HP formula calculates the horsepower increase from forced induction (turbocharging or supercharging) based on boost pressure. It provides an estimate of how much additional power an engine can produce with increased air pressure.
The calculator uses the Boost to HP formula:
Where:
Explanation: The formula calculates the percentage increase in air density from forced induction and applies it to the base horsepower to estimate the power gain.
Details: This calculation is crucial for automotive enthusiasts, mechanics, and engineers to estimate power gains from turbocharging or supercharging, helping with performance tuning and component selection.
Tips: Enter the engine's base naturally aspirated horsepower and the boost pressure in psi. Both values must be positive numbers for accurate calculation.
Q1: Is this formula accurate for all engines?
A: This provides a rough estimate. Actual results may vary based on engine efficiency, turbo/supercharger efficiency, fuel quality, and other factors.
Q2: Why is 14.7 used in the formula?
A: 14.7 psi represents standard atmospheric pressure at sea level, which is the baseline for naturally aspirated engines.
Q3: Does this account for intercooling?
A: No, this is a basic calculation that doesn't account for intercooler efficiency, which affects the actual air density entering the engine.
Q4: Can I use this for diesel engines?
A: While the principle is similar, diesel engines operate differently and may have different efficiency factors.
Q5: What's a typical boost pressure range?
A: Most street performance applications use 5-15 psi, while racing applications can exceed 30+ psi with proper engine modifications.