1. What is Horsepower Boost Calculation?

The horsepower boost calculation estimates the increased power output of an engine when forced induction (turbocharging or supercharging) is added. It helps predict performance gains from boost pressure.

2. How Does the Calculator Work?

The calculator uses the horsepower boost equation:

Where:

• \( BaseHP \) — Naturally aspirated horsepower (hp)
• \( BoostPSI \) — Boost pressure in pounds per square inch (psi)
• \( HPperPSI \) — Horsepower gain per psi of boost (typically 10-20 hp/psi)

Explanation: The equation calculates total horsepower by adding the base horsepower to the product of boost pressure and the engine's efficiency factor (hp per psi).

3. Importance of HP Boost Calculation

Details: Accurate horsepower estimation is crucial for engine tuning, component selection, and predicting performance gains from forced induction systems.

4. Using the Calculator

Tips: Enter base horsepower in hp, boost pressure in psi, and the hp per psi factor (typically between 10-20). All values must be valid (base hp > 0, boost psi ≥ 0, hp per psi between 10-20).

5. Frequently Asked Questions (FAQ)

Q1: What is a typical HP per PSI value?
A: Most engines gain 10-20 horsepower per psi of boost, with more efficient engines at the higher end of this range.

Q2: Does this work for both turbochargers and superchargers?
A: Yes, the calculation applies to both, though actual results may vary based on system efficiency and heat management.

Q3: Why is the HP per PSI range 10-20?
A: This accounts for differences in engine efficiency, displacement, and forced induction system effectiveness.

Q4: What factors affect HP per PSI?
A: Engine displacement, compression ratio, intercooling efficiency, and fuel quality all influence the actual horsepower gain per psi.

Q5: Is this calculation accurate for high boost levels?
A: At very high boost levels (above 20 psi), the relationship may become non-linear due to increased heat and efficiency losses.