1. What Is Torque Converter Stall Speed?

Stall speed is the maximum engine speed at which a torque converter can multiply torque when the output shaft is held stationary. It represents the point where the torque converter transfers maximum torque to the transmission.

2. How Does The Calculator Work?

The calculator uses the stall speed formula:

Where:

• \( K \) — Dimensionless constant specific to the torque converter design
• \( T_{\text{engine}} \) — Engine torque in Newton-meters (Nm)
• \( \text{inertia} \) — Rotational inertia in kilogram meters squared (kg m²)

Explanation: The formula calculates the rotational speed at which the torque converter reaches its maximum torque multiplication capability based on engine torque and system inertia.

3. Importance Of Stall Speed Calculation

Details: Proper stall speed calculation is crucial for vehicle performance optimization, transmission system design, and ensuring efficient power transfer from engine to transmission.

4. Using The Calculator

Tips: Enter the torque converter constant (K), engine torque in Nm, and rotational inertia in kg m². All values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical value for constant K?
A: The K constant typically ranges from 2000-4000 depending on torque converter design and application, with higher values for performance applications.

Q2: How does stall speed affect vehicle performance?
A: Higher stall speeds allow better acceleration from standstill but may reduce fuel efficiency. Lower stall speeds provide better fuel economy but slower acceleration.

Q3: Can I use this calculator for any torque converter?
A: Yes, but you need the specific K constant for your torque converter, which is usually provided by the manufacturer or determined through testing.

Q4: What factors affect the K constant?
A: The K constant depends on torque converter design elements including impeller and turbine blade angles, converter size, and fluid dynamics characteristics.

Q5: How accurate is this calculation?
A: The calculation provides a theoretical estimate. Actual stall speed may vary due to fluid temperature, wear, and other operational factors.