Boosted Engine Power Calculator

1. What is a Boosted Engine Power Calculator?

Definition: This calculator determines the boosted engine power after adding a supercharger, based on the boost pressure and current engine power.

Purpose: It is used in automotive engineering to estimate the power increase from supercharging an engine.

2. How Does the Calculator Work?

The calculator uses the following formula:

\[ \text{boosted power} = \frac{P + 14.7}{14.7} \times N \] Where:

\(\text{boosted power}\): Boosted engine power (hp, kW)
\(P\): Boost pressure (psi, bar)
\(N\): Current engine power (hp, kW)
\(14.7\): Standard atmospheric pressure (psi)

Unit Conversions:

Current Engine Power (N): hp, kW (1 hp = 0.7457 kW)
Boost Added (P): psi, bar (1 bar = 14.5038 psi)
Boosted Engine Power: hp, kW (1 hp = 0.7457 kW)

Steps:

Enter the current engine power (N), selecting the unit (hp, kW).
Enter the boost added (P), selecting the unit (psi, bar).
Convert inputs to base units (hp, psi) for calculation.
Calculate the boosted power using the formula.
Convert the result to the selected power unit (hp or kW) and display.

3. Importance of Boosted Engine Power Calculation

Calculating boosted engine power is crucial for:

Automotive Engineering: Understanding power gains from supercharging.
Performance Tuning: Optimizing engine performance for racing or heavy-duty applications.
Design: Selecting appropriate superchargers for desired power outputs.

4. Using the Calculator

Examples:

Example 1: For \(N = 200 \, \text{hp}\), \(P = 10 \, \text{psi}\):
- Boosted Power: \(\text{boosted power} = \frac{10 + 14.7}{14.7} \times 200 = 336.05 \, \text{hp}\)
- In kW: \(\text{boosted power} = 336.05 \times 0.7457 = 250.58 \, \text{kW}\)
Example 2: For \(N = 150 \, \text{kW}\), \(P = 0.5 \, \text{bar}\):
- Convert: \(N = 150 \div 0.7457 = 201.02 \, \text{hp}\), \(P = 0.5 \times 14.5038 = 7.25 \, \text{psi}\)
- Boosted Power: \(\text{boosted power} = \frac{7.25 + 14.7}{14.7} \times 201.02 = 300.00 \, \text{hp}\)
- In kW: \(\text{boosted power} = 300.00 \times 0.7457 = 223.71 \, \text{kW}\)

5. Frequently Asked Questions (FAQ)

Q: What is boosted engine power?
A: Boosted engine power is the increased power output of an engine after adding a supercharger, calculated as \(\text{boosted power} = \frac{P + 14.7}{14.7} \times N\).

Q: Can the boost pressure be negative?
A: No, the boost pressure should be non-negative as negative pressure is not physically meaningful in this context.

Q: What happens if the current power is zero?
A: If the current power is zero, the boosted power will also be zero, as there is no base power to boost.

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