1. What is the Boost To HP Formula?

The Boost To HP formula calculates the horsepower increase for a PC (performance car) when adding forced induction (turbocharger or supercharger). It estimates the power gain based on boost pressure and base horsepower.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Base HP \) — Original horsepower before adding boost
• \( Boost \) — Boost pressure in pounds per square inch (psi)
• \( 14.7 \) — Atmospheric pressure at sea level (psi)

Explanation: The formula calculates the approximate horsepower increase by accounting for the additional air pressure forced into the engine, relative to atmospheric pressure.

3. Importance of HP Calculation

Details: Accurate horsepower estimation is crucial for performance tuning, engine building, and ensuring proper component selection for forced induction systems.

4. Using the Calculator

Tips: Enter base horsepower in hp, boost pressure in psi. All values must be valid (base HP > 0, boost ≥ 0).

5. Frequently Asked Questions (FAQ)

Q1: Is this formula accurate for all engines?
A: This provides an estimate. Actual results may vary based on engine efficiency, turbo/supercharger efficiency, and supporting modifications.

Q2: Why is 14.7 used in the formula?
A: 14.7 psi represents standard atmospheric pressure at sea level, which serves as the baseline for calculating pressure ratio.

Q3: Does this account for intercooler efficiency?
A: No, this is a simplified formula that doesn't account for temperature changes, intercooler efficiency, or other factors affecting actual power output.

Q4: Can I use this for both turbo and supercharger applications?
A: Yes, the formula works for both forced induction types, though actual results may differ due to varying efficiency characteristics.

Q5: What are typical boost levels for street applications?
A: Most street applications run 5-15 psi, while race applications can exceed 30+ psi with proper engine built and fuel system.