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Quarter Mile ET Equation:
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The Quarter Mile ET (Elapsed Time) equation estimates the time it takes for a vehicle to complete a quarter mile drag race based on its weight and horsepower. This formula is widely used in automotive performance analysis and racing.
The calculator uses the Quarter Mile ET equation:
Where:
Explanation: The equation calculates the quarter mile time by taking the cube root of the weight-to-horsepower ratio and multiplying by the constant 5.825.
Details: Quarter mile time is a standard performance metric in automotive racing and tuning. It helps evaluate vehicle acceleration capabilities and compare performance between different vehicles or modifications.
Tips: Enter vehicle weight in pounds and horsepower. Both values must be positive numbers. The calculator will provide the estimated quarter mile elapsed time in seconds.
Q1: How accurate is this equation?
A: This equation provides a good estimate for most vehicles, but actual performance may vary based on traction, aerodynamics, transmission, and other factors.
Q2: What is considered a good quarter mile time?
A: For production cars, times under 14 seconds are considered quick, under 12 seconds are very fast, and under 10 seconds are exceptional performance levels.
Q3: Does this account for driver weight?
A: No, the equation uses vehicle weight only. For more accurate results, include driver and passenger weight in the total weight calculation.
Q4: Can this be used for motorcycles?
A: Yes, the equation works for any vehicle type, though traction and power delivery characteristics may affect actual performance.
Q5: What factors affect quarter mile times besides weight and horsepower?
A: Traction, aerodynamics, transmission type, tire condition, launch technique, and weather conditions all significantly impact actual quarter mile performance.