1. What is Boost PSI to HP Conversion?

The Boost PSI to HP conversion estimates the horsepower gain from forced induction (turbocharging or supercharging) based on the base naturally aspirated horsepower and boost pressure. This helps in performance tuning and engine modification planning.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

• \( Base\ HP \) — Naturally aspirated horsepower (hp)
• \( Boost\ PSI \) — Boost pressure in pounds per square inch (psi)
• \( 14.7 \) — Atmospheric pressure at sea level (psi)

Explanation: The equation calculates the percentage increase in air density from boost pressure and applies it to the base horsepower.

3. Importance of HP Gain Calculation

Details: Accurate HP gain estimation is crucial for engine tuning, selecting appropriate components, and ensuring the engine can handle the increased power safely.

4. Using the Calculator

Tips: Enter base naturally aspirated horsepower in hp and boost pressure in psi. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Is this calculation accurate for all engines?
A: This provides a rough estimate. Actual gains depend on many factors including engine efficiency, turbo/supercharger efficiency, and supporting modifications.

Q2: Why divide by 14.7 psi?
A: 14.7 psi is atmospheric pressure at sea level. The ratio (Boost PSI/14.7) represents the percentage increase in air density from forced induction.

Q3: Does this account for intercooling?
A: No, this is a basic calculation. An efficient intercooler can increase actual power gains by reducing intake air temperature.

Q4: What's a typical boost pressure range?
A: Street applications typically run 6-15 psi, while high-performance builds may use 20-40 psi or more with proper engine modifications.

Q5: Should I use wheel horsepower or engine horsepower?
A: For most accurate results, use the engine's naturally aspirated brake horsepower (BHP) at the crank.