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Quarter Mile Equation:
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The quarter mile equation estimates the elapsed time (ET) for a vehicle to complete a quarter mile drag race based on its weight and horsepower. This formula provides a theoretical performance estimate for drag racing vehicles.
The calculator uses the quarter mile equation:
Where:
Explanation: The equation calculates the theoretical quarter mile time based on the power-to-weight ratio of the vehicle, with the cube root relationship reflecting the diminishing returns of increased power.
Details: Quarter mile time is a standard performance metric in automotive racing that helps compare vehicle acceleration capabilities and predict drag racing performance.
Tips: Enter vehicle weight in pounds and horsepower. All values must be valid (weight > 0, horsepower > 0). The result provides an estimated quarter mile time in seconds.
Q1: How accurate is this equation?
A: This provides a theoretical estimate. Actual performance may vary based on traction, aerodynamics, transmission efficiency, and driver skill.
Q2: What is a good quarter mile time?
A: Times vary by vehicle type. Street-legal production cars typically range from 12-16 seconds, while dedicated dragsters can achieve under 7 seconds.
Q3: Does this account for driver weight?
A: The weight input should include the total weight of the vehicle plus driver and any additional cargo or fuel.
Q4: What are the limitations of this equation?
A: This formula doesn't account for traction limitations, aerodynamic drag, transmission gearing, or launch technique, which all significantly affect actual quarter mile times.
Q5: Can I use this for electric vehicles?
A: While the basic physics applies, electric vehicles have different torque characteristics that may affect actual performance compared to this theoretical calculation.