1. What is Torque Converter Size?

The torque converter size is a calculated value that helps determine the appropriate torque converter for a vehicle based on its torque multiplication ratio and stall speed. Proper sizing is crucial for optimal vehicle performance.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Torque\ Ratio \) — The torque multiplication ratio of the converter (typically 1.5 to 2.5 for street vehicles)
• \( Stall \) — The stall speed in RPM where the converter transfers maximum torque

Explanation: The size calculation helps match the torque converter to the engine's power band and the vehicle's intended use.

3. Importance of Proper Torque Converter Sizing

Details: Correct torque converter sizing affects launch performance, acceleration, and overall drivability. An improperly sized converter can lead to poor performance or excessive heat buildup.

4. Using the Calculator

Tips: Enter the torque ratio (available from manufacturer specifications) and the desired stall speed. Typical street performance converters have stall speeds between 2000-3000 RPM.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical torque ratio for street vehicles?
A: Most street performance converters have torque ratios between 1.8 and 2.2.

Q2: How does stall speed affect performance?
A: Higher stall speeds allow the engine to reach its power band quicker but may reduce low-speed drivability.

Q3: What happens if my converter is too small?
A: A converter that's too small may cause excessive slippage and heat buildup, reducing efficiency and potentially damaging the transmission.

Q4: Can I use this for racing applications?
A: While the same formula applies, racing converters often have higher stall speeds and torque ratios - consult with a specialist for race applications.

Q5: Does vehicle weight affect converter selection?
A: Yes, heavier vehicles often benefit from higher stall speeds to overcome inertia.