1. What is the PSI to HP Calculation?

The PSI to HP calculation estimates the horsepower gain from forced induction (turbocharging or supercharging) based on boost pressure. It provides a rough estimate of how much power increase you can expect from a given amount of boost.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula accounts for the increased air density from forced induction, which allows more fuel to be burned and thus increases power output.

3. Importance of HP Calculation

Details: Understanding potential power gains helps in engine tuning, turbocharger selection, and ensuring your engine can handle the increased power safely.

4. Using the Calculator

Tips: Enter your engine's naturally aspirated horsepower and the boost pressure you plan to run. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Is this calculation accurate for all engines?
A: This provides a theoretical maximum. Actual gains depend on engine efficiency, turbo efficiency, intercooling, and other factors.

Q2: Why 14.7 psi?
A: This represents standard atmospheric pressure at sea level. The formula calculates how much additional air pressure you're adding beyond atmospheric.

Q3: Does this account for turbo lag?
A: No, this calculates peak power potential, not how quickly the power comes on.

Q4: What about altitude effects?
A: At higher altitudes where atmospheric pressure is lower, the same boost pressure will represent a greater percentage increase.

Q5: Can I use this for superchargers?
A: Yes, the calculation works similarly for both turbochargers and superchargers.