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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 distance based on its weight and horsepower. This calculation provides a theoretical performance metric for automotive enthusiasts and racers.
The calculator uses the quarter mile ET equation:
Where:
Explanation: The equation calculates the theoretical elapsed time based on the power-to-weight ratio of the vehicle, with the cube root relationship accounting for the non-linear performance characteristics.
Details: Quarter mile time is a standard performance metric in automotive racing that helps evaluate a vehicle's acceleration and overall performance capabilities. It's particularly important for drag racing enthusiasts and automotive engineers.
Tips: Enter vehicle weight in pounds and horsepower. Both values must be valid positive numbers for accurate calculation.
Q1: How accurate is this ET calculation?
A: This provides a theoretical estimate. Actual quarter mile times may vary based on traction, aerodynamics, transmission efficiency, and driver skill.
Q2: What is considered a good quarter mile time?
A: Times vary by vehicle type. Generally, under 12 seconds is excellent for production cars, while professional drag cars can achieve under 6 seconds.
Q3: Does this account for drivetrain losses?
A: No, this calculation uses raw horsepower. For more accurate results, use wheel horsepower which accounts for drivetrain losses.
Q4: Can I use this for motorcycles?
A: Yes, the equation works for any vehicle, though motorcycle aerodynamics and weight distribution may affect actual results.
Q5: What other factors affect quarter mile times?
A: Traction, gearing, shift points, atmospheric conditions, and vehicle aerodynamics all significantly impact actual quarter mile performance.