Engine Horsepower Calculator
Calculate Engine Power
Engine Power Results
Enter engine specifications to calculate power
Engine Power Guide
Understanding Engine Power
Power Categories
- High Performance: 600+ HP
- Performance: 400-599 HP
- Sport: 300-399 HP
- Standard: 200-299 HP
- Economy: Below 200 HP
Volumetric Efficiency
- Stock Engines: 75-85%
- Modified NA: 85-95%
- Forced Induction: 85-150%+
- Race Engines: 95-100%
Factors Affecting Engine Power
Compression Ratio
- Low: 8:1 - 9:1
- Medium: 9:1 - 10.5:1
- High: 10.5:1 - 12:1
- Race: 12:1+
Boost Pressure
- Mild: 5-8 PSI
- Moderate: 8-15 PSI
- High: 15-25 PSI
- Extreme: 25+ PSI
Important Notes
- Results are theoretical estimates and may vary from actual dyno results
- Higher compression ratios require higher octane fuel
- Boost pressure significantly affects power output
- Engine modifications can greatly impact actual power output
- Consider factors like altitude and temperature for real-world performance