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CC to HP Conversion Formula:
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CC to HP conversion is a rule of thumb method to estimate engine horsepower from engine displacement in cubic centimeters. This approximation is commonly used for small engines where detailed specifications may not be available.
The calculator uses the simple conversion formula:
Where:
Explanation: This formula provides a rough estimate of horsepower based on engine size, assuming typical efficiency for small internal combustion engines.
Details: Estimating horsepower from engine displacement helps in comparing engine performance, selecting appropriate engines for applications, and understanding power output capabilities for various mechanical systems.
Tips: Enter engine displacement in cubic centimeters (cc). The value must be greater than zero. This calculation provides an approximation and actual horsepower may vary based on engine design, efficiency, and other factors.
Q1: How accurate is this conversion?
A: This is a rough estimate. Actual horsepower can vary significantly based on engine design, compression ratio, fuel system, and other engineering factors.
Q2: Does this work for all engine types?
A: This approximation works best for small 4-stroke engines. For high-performance engines, turbocharged engines, or 2-stroke engines, the actual HP may be higher.
Q3: Why divide by 15 specifically?
A: The factor of 15 is derived from empirical observations of typical small engine efficiency. It represents the approximate cc per horsepower for many standard small engines.
Q4: Can I use this for automotive engines?
A: While you can use it, modern automotive engines are more efficient and may produce more horsepower per cc due to advanced technologies like turbocharging and variable valve timing.
Q5: What are typical CC to HP ratios?
A: Small engines: ~15:1, Performance engines: ~10:1, High-performance racing engines: ~5:1 or less. The ratio indicates how many cc are needed to produce 1 HP.