Boost to Compression Ratio Calculator

Formula

The formula to calculate the Effective Compression Ratio (ECR) is:

\[ ECR = CR \times \left(1 + \frac{B}{14.7}\right) \]

Where:

Boost to Compression Ratio: The relationship between the boost pressure provided by a turbocharger or supercharger and the engine’s compression ratio.
Significance: Crucial for determining the effective compression ratio, which affects engine performance, efficiency, and potential for detonation.

Let's say the compression ratio (CR) is 10 and the boost (B) is 7 psi. Using the formula:

\[ ECR = 10 \times \left(1 + \frac{7}{14.7}\right) \approx 14.76 \]

So, the Effective Compression Ratio (ECR) is approximately 14.76.