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Quarter-mile Elapsed Time Prediction:
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The quarter-mile elapsed time prediction formula estimates the time it takes for a vehicle to complete a quarter-mile (402.336 meters) drag race based on vehicle weight and horsepower. This formula provides a theoretical estimate of drag racing performance.
The calculator uses the quarter-mile prediction formula:
Where:
Explanation: The formula calculates the cube root of the weight-to-power ratio and multiplies it by the constant 5.825 to estimate quarter-mile elapsed time.
Details: Quarter-mile elapsed time is a standard performance metric in motorsports, particularly in drag racing. It helps racers and enthusiasts estimate vehicle performance and compare different setups.
Tips: Enter vehicle weight in pounds and engine horsepower. Both values must be positive numbers. The calculator provides an estimated quarter-mile time in seconds.
Q1: How accurate is this prediction formula?
A: This formula provides a theoretical estimate. Actual performance may vary based on traction, aerodynamics, transmission, and driver skill.
Q2: What is considered a good quarter-mile time?
A: Times vary by vehicle type: 14-16 seconds for average sports cars, 12-14 seconds for performance cars, and under 10 seconds for dedicated drag racing vehicles.
Q3: Does this include driver weight?
A: The formula uses total vehicle weight. For accurate results, include driver and passenger weight in your calculation.
Q4: What about wheel horsepower vs crank horsepower?
A: The formula typically uses crank horsepower. If using wheel horsepower, results may be slightly optimistic due to drivetrain losses.
Q5: Can this formula predict trap speed?
A: This specific formula only predicts elapsed time. Other formulas exist for estimating trap speed at the end of the quarter-mile.