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1/8-mile ET Equation:
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The 1/8-mile ET (Elapsed Time) Calculator estimates the time it takes for a vehicle to complete an 1/8-mile drag race based on weight and horsepower. This calculation helps racers predict performance and optimize their vehicle setup.
The calculator uses the 1/8-mile ET equation:
Where:
Explanation: The formula calculates elapsed time based on the power-to-weight ratio, with the cube root relationship reflecting the non-linear acceleration characteristics of vehicles.
Details: Accurate ET estimation is crucial for drag racers to predict vehicle performance, compare different setups, and make informed decisions about modifications and tuning.
Tips: Enter vehicle weight in pounds and horsepower. Both values must be positive numbers. The calculator provides the estimated 1/8-mile elapsed time in seconds.
Q1: How Accurate Is This Calculator?
A: This provides a theoretical estimate based on power-to-weight ratio. Actual ET can vary due to traction, aerodynamics, driver skill, and transmission efficiency.
Q2: What Is A Good 1/8-Mile ET?
A: For street cars, 8-10 seconds is typical. Performance cars range from 6-8 seconds, while professional drag cars can achieve 4-6 seconds.
Q3: Should I Use Curb Weight Or Race Weight?
A: Use race weight (vehicle + driver + fuel) for most accurate results, as this reflects the actual weight during the run.
Q4: What Are The Limitations Of This Formula?
A: This formula doesn't account for traction limitations, aerodynamic drag, transmission type, or launch characteristics, which significantly affect actual performance.
Q5: Can I Use This For 1/4-Mile Estimation?
A: No, this formula is specifically calibrated for 1/8-mile distance. 1/4-mile calculations require different constants and considerations.