Torque Converter Size Calculator

Torque Converter Formula:

\[ Diameter = \frac{Engine\ HP}{\left(\frac{Stall\ Speed\ RPM}{1000}\right)} \]

Diameter (inches):

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1. What is Torque Converter Size Calculator?

The Torque Converter Size Calculator helps determine the appropriate diameter for a torque converter based on engine horsepower and desired stall speed. Proper sizing is crucial for optimal transmission performance and vehicle acceleration.

2. How Does the Calculator Work?

The calculator uses the torque converter formula:

\[ Diameter = \frac{Engine\ HP}{\left(\frac{Stall\ Speed\ RPM}{1000}\right)} \]

Where:

\( Engine\ HP \) — Engine horsepower
\( Stall\ Speed\ RPM \) — Desired stall speed in revolutions per minute
\( Diameter \) — Resulting torque converter diameter in inches

Explanation: This formula provides an approximate size calculation that balances engine power characteristics with transmission requirements for optimal performance.

3. Importance of Torque Converter Sizing

Details: Correct torque converter sizing ensures efficient power transfer, proper stall characteristics, and optimal acceleration. An improperly sized converter can lead to poor performance, overheating, and transmission damage.

4. Using the Calculator

Tips: Enter engine horsepower and desired stall speed RPM. Both values must be positive numbers. The result provides an approximate diameter for torque converter selection.

5. Frequently Asked Questions (FAQ)

Q1: What is stall speed in a torque converter?
A: Stall speed is the maximum RPM the engine can reach with the transmission in gear and the brakes applied before the vehicle begins to move.

Q2: Why is diameter important for torque converters?
A: Larger diameters generally provide higher stall speeds and better torque multiplication, while smaller diameters offer quicker response and better fuel efficiency.

Q3: Can I use this calculator for all vehicle types?
A: This provides a general approximation. Specific applications may require adjustments based on vehicle weight, transmission type, and intended use.

Q4: What factors affect torque converter selection?
A: Engine torque curve, vehicle weight, transmission type, gear ratios, and intended use (street, racing, towing) all influence optimal converter selection.

Q5: Is this calculation exact?
A: This provides an approximate size. Final selection should consider manufacturer specifications and professional consultation for specific applications.