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Quarter Mile Elapsed Time Equation:
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The Quarter Mile Elapsed Time Calculator estimates the time it takes for a vehicle to complete a quarter mile (402 meters) drag race based on horsepower and weight. This calculation is commonly used in automotive performance testing and racing.
The calculator uses the quarter mile elapsed time equation:
Where:
Explanation: The equation calculates the cube root of the power-to-weight ratio and divides 1353 by this value to estimate quarter mile time. This provides a theoretical estimate of vehicle acceleration performance.
Details: Quarter mile time is a standard performance metric in automotive racing and testing. It helps compare vehicle acceleration capabilities and is used by enthusiasts, racers, and automotive engineers to evaluate performance modifications.
Tips: Enter horsepower and vehicle weight in pounds. Both values must be positive numbers. The calculator provides an estimated quarter mile time in seconds.
Q1: How accurate is this calculation?
A: This provides a theoretical estimate. Actual quarter mile times can vary based on traction, transmission, aerodynamics, driver skill, and other factors.
Q2: What is considered a good quarter mile time?
A: Times vary by vehicle type: 14+ seconds for average cars, 12-13 seconds for performance cars, 10-11 seconds for sports cars, and under 10 seconds for dedicated race cars.
Q3: Does this account for drivetrain losses?
A: No, this calculation uses raw horsepower. For wheel horsepower, you may need to adjust the input value based on drivetrain efficiency.
Q4: Can I use metric units?
A: This calculator uses pounds for weight. For kilograms, convert by multiplying by 2.20462 before entering the value.
Q5: What factors affect actual quarter mile performance?
A: Traction, tire type, transmission type, shift points, weather conditions, altitude, and vehicle aerodynamics all impact real-world performance.