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Drag Racing Equation:
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The drag racing 1/8-mile equation estimates elapsed time (ET) from vehicle weight and horsepower. This formula provides a theoretical calculation of how quickly a vehicle can complete an 1/8-mile drag strip based on its power-to-weight ratio.
The calculator uses the drag racing equation:
Where:
Explanation: The equation demonstrates the cubic relationship between power-to-weight ratio and elapsed time, showing that reducing weight or increasing horsepower has a significant impact on performance.
Details: Accurate ET estimation is crucial for drag racing enthusiasts, automotive engineers, and performance tuners to predict vehicle performance, optimize modifications, and set realistic performance goals.
Tips: Enter vehicle weight in pounds and engine horsepower. Both values must be positive numbers. The calculator provides theoretical elapsed time for a standard 1/8-mile drag strip.
Q1: How accurate is this calculation?
A: This provides a theoretical estimate. Actual ET depends on traction, aerodynamics, driver skill, transmission efficiency, and track conditions.
Q2: What is a good 1/8-mile time?
A: Times vary by vehicle type: 6-7 seconds for professional drag cars, 7-9 seconds for high-performance street cars, 9-12 seconds for average performance vehicles.
Q3: Should I use curb weight or race weight?
A: Use race weight (curb weight + driver + fuel) for most accurate predictions in actual racing scenarios.
Q4: Are there limitations to this equation?
A: This equation assumes perfect traction and doesn't account for aerodynamic drag, transmission losses, or launch characteristics.
Q5: Can this be used for different racing distances?
A: This specific equation is calibrated for 1/8-mile. Different constants are used for 1/4-mile and other distances.