Supercharger RPM Calculator

To calculate the Supercharger RPM (SCRPM), multiply the crankshaft diameter by the engine RPM, divide by the supercharger pulley diameter, and then apply any specific ratios for your system.

The Supercharger RPM Calculator is an indispensable tool for car enthusiasts and mechanics looking to optimize engine performance. By accurately determining the RPM of a supercharger, you can ensure it operates within its intended range, maximizing boost efficiency and engine power.

Whether you’re upgrading pulleys, tweaking ratios, or troubleshooting performance issues, this calculator simplifies complex calculations for precise results.

Formula

SCRPM = $\frac{CD}{SCD} \times ERPM$

Variable	Description	Unit
SCRPM	Supercharger RPM	RPM
CD	Crankshaft Pulley Diameter	Inches
SCD	Supercharger Pulley Diameter	Inches
ERPM	Engine RPM	RPM

Solved Calculations

Example 1: Calculate the supercharger RPM for:

Crankshaft Pulley Diameter ( $CD$ ): 6 inches
Supercharger Pulley Diameter ( $SCD$ ): 3 inches
Engine RPM ( $ERPM$ ): 6,000 RPM

Step	Calculation	Result
Calculate Ratio	$CD / SCD = 6 / 3$	2
Calculate Supercharger RPM	$SCRPM = 2 \times 6,000$	12,000 RPM

Example 2: Find the supercharger RPM with:

Crankshaft Pulley Diameter ( $CD$ ): 7 inches
Supercharger Pulley Diameter ( $SCD$ ): 4 inches
Engine RPM ( $ERPM$ ): 5,500 RPM

Step	Calculation	Result
Calculate Ratio	$CD / SCD = 7 / 4$	1.75
Calculate Supercharger RPM	$SCRPM = 1.75 \times 5,500$	9,625 RPM

What is Supercharger RPM Calculator?

The Supercharger RPM Calculator is a highly specialized tool designed to determine the rotational speed of a supercharger based on the engine RPM, pulley sizes, and gear ratios.

It is essential for automotive enthusiasts, engineers, and mechanics aiming to optimize boost levels, engine performance, and overall efficiency.

This calculator utilizes inputs such as supercharger pulley size, crankshaft pulley diameter, and engine RPM to compute the supercharger speed.

For instance, with a smaller supercharger pulley, the RPM increases, enhancing boost pressure but also potentially increasing stress on components.

Tools like the supercharger pulley ratio calculator or procharger RPM calculator ensure precision in achieving desired performance levels without exceeding the supercharger’s recommended RPM range.

Additionally, this tool is compatible with specific systems like Vortech superchargers and Eaton blowers, making it versatile for various setups.

Professionals can also calculate the supercharger boost using supplementary data like compression ratios and psi charts.

Final Words:

In summary, the Supercharger RPM Calculator is indispensable for fine-tuning supercharger systems. It helps balance speed and boost to achieve optimal engine performance, safeguarding components and enhancing power delivery for automotive applications.