V2 Impeller Speed Calculator

Impeller Speed Formula:

\[ \text{Impeller Speed} = \text{Engine RPM} \times \left(\frac{\text{Crank}}{\text{Super}}\right) \times 3.6 \]

Impeller Speed:

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1. What is the V2 Impeller Speed Calculation?

The V2 Impeller Speed calculation determines the rotational speed of the impeller in a supercharger system based on engine RPM and pulley sizes. This is crucial for understanding supercharger performance and ensuring it operates within safe limits.

2. How Does the Calculator Work?

The calculator uses the impeller speed equation:

\[ \text{Impeller Speed} = \text{Engine RPM} \times \left(\frac{\text{Crank}}{\text{Super}}\right) \times 3.6 \]

Where:

\( \text{Engine RPM} \) — Engine revolutions per minute
\( \text{Crank} \) — Crank pulley diameter (inches)
\( \text{Super} \) — Supercharger pulley diameter (inches)
\( 3.6 \) — V2 model step-up ratio

Explanation: The equation calculates how much faster the impeller spins compared to the engine based on pulley ratios and the V2-specific step-up ratio.

3. Importance of Impeller Speed Calculation

Details: Knowing impeller speed is essential for supercharger system tuning, preventing overspeed damage, and optimizing performance. Exceeding manufacturer-recommended impeller speeds can lead to premature failure.

4. Using the Calculator

Tips: Enter engine RPM, crank pulley diameter, and supercharger pulley diameter in the specified units. All values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is there a 3.6 multiplier for V2 models?
A: The 3.6 represents the internal step-up ratio specific to the V2 supercharger design, accounting for gear multiplication inside the supercharger.

Q2: What are typical impeller speed ranges?
A: Most superchargers have maximum impeller speeds between 50,000-65,000 rpm, but always consult your specific model's specifications.

Q3: How does changing pulley sizes affect impeller speed?
A: A smaller supercharger pulley or larger crank pulley will increase impeller speed, while a larger supercharger pulley or smaller crank pulley will decrease it.

Q4: Is this calculation valid for all supercharger models?
A: No, this is specific to V2 models. Other supercharger models may have different step-up ratios.

Q5: What happens if impeller speed is too high?
A: Excessive impeller speed can cause bearing failure, impeller contact with housing, or even catastrophic supercharger failure.