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Stall Speed Formula:
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Torque converter stall speed is the maximum RPM an engine can reach when the transmission is in gear but the vehicle is prevented from moving. It's a critical parameter for performance vehicles as it determines how quickly the vehicle can accelerate from a standstill.
The calculator uses the stall speed estimation formula:
Where:
Explanation: The formula estimates the RPM at which the torque converter will allow the engine to reach its peak torque output before transferring power to the wheels.
Details: Selecting the correct stall speed is crucial for optimal vehicle performance. Too low a stall speed results in poor acceleration, while too high a stall speed can cause excessive heat buildup and reduced efficiency.
Tips: Enter your engine's horsepower, vehicle weight in pounds, and an appropriate K constant (start with 1.0 and adjust based on your specific application). All values must be positive numbers.
Q1: What is a typical K constant value?
A: The K constant typically ranges from 0.8 for street applications to 1.2 for high-performance racing applications.
Q2: How accurate is this estimation?
A: This provides a rough estimate. Actual stall speed can vary based on torque converter design, engine characteristics, and other factors.
Q3: Should I consider engine torque in stall speed selection?
A: Yes, while this formula uses horsepower, torque characteristics significantly affect ideal stall speed selection.
Q4: What happens if I choose the wrong stall speed?
A: Incorrect stall speed can lead to poor performance, overheating transmission fluid, and reduced fuel efficiency.
Q5: Can this calculator be used for all vehicle types?
A: This calculator is primarily designed for rear-wheel drive performance vehicles common in Australian automotive applications.