1. What is Torque Converter Stall Speed?

Torque converter stall speed is the maximum engine speed at which the torque converter can hold the vehicle stationary with the brakes applied and the transmission in gear. It's a critical parameter for performance vehicles and transmission tuning.

2. How Does the Calculator Work?

The calculator uses the stall speed formula:

Where:

• \( Stall \) — Stall speed in RPM
• \( K \) — Torque converter constant (typically 2500-3500)
• \( HP \) — Engine horsepower

Explanation: The formula calculates the approximate stall speed based on engine horsepower and a torque converter-specific constant.

3. Importance of Stall Speed Calculation

Details: Proper stall speed selection is crucial for optimal vehicle performance. A correctly matched torque converter improves acceleration, towing capability, and overall drivability.

4. Using the Calculator

Tips: Enter the torque converter constant (K) and engine horsepower. The K value depends on the specific torque converter design and typically ranges from 2500 to 3500.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical K value range?
A: Most performance torque converters have K values between 2500-3500, with street converters typically around 2500 and high-performance converters closer to 3500.

Q2: How does stall speed affect vehicle performance?
A: Higher stall speeds allow the engine to reach its power band faster, improving acceleration but may reduce fuel efficiency at low speeds.

Q3: Can I use this calculator for any vehicle?
A: This formula provides an estimate for most rear-wheel drive vehicles with automatic transmissions. Front-wheel drive and specialized applications may require different calculations.

Q4: What factors affect the K constant?
A: The K value is determined by torque converter design elements including fin angle, diameter, and stall characteristics specific to each converter model.

Q5: Should I consult a professional for torque converter selection?
A: Yes, for optimal performance it's recommended to consult with a transmission specialist who can consider all factors including vehicle weight, gear ratio, and intended use.