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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 provides a theoretical estimation of a vehicle's performance in a straight-line acceleration test.
The calculator uses the Quarter Mile ET equation:
Where:
Explanation: The equation calculates the theoretical elapsed time for a quarter mile drag race based on the power-to-weight ratio of the vehicle.
Details: Accurate ET estimation is crucial for drag racing enthusiasts, automotive engineers, and performance tuners to predict vehicle performance, compare different setups, and optimize racing strategies.
Tips: Enter vehicle weight in pounds and horsepower. Both values must be valid (greater than 0). For best results, use the vehicle's actual curb weight and measured horsepower at the wheels.
Q1: How accurate is this ET calculation?
A: This formula provides a theoretical estimation. Actual ET can vary based on traction, aerodynamics, transmission efficiency, driver skill, and environmental conditions.
Q2: What is a good quarter mile time?
A: For production cars, times under 13 seconds are considered excellent, while times under 10 seconds are typically achieved by dedicated drag racing vehicles.
Q3: Does this equation account for different drivetrain losses?
A: No, this is a simplified formula. For more accurate results, use wheel horsepower rather than engine horsepower to account for drivetrain losses.
Q4: Can I use this for motorcycles?
A: Yes, the formula works for any vehicle, but motorcycle times may vary more due to different power delivery characteristics and rider weight impact.
Q5: How does weight reduction affect ET?
A: Reducing weight has a significant impact on ET. According to the formula, reducing weight by 10% should improve ET by approximately 3-4%.