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Drag Racing ET Equation:
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The Drag Racing ET (Elapsed Time) equation estimates the time a vehicle takes to complete a quarter-mile drag strip based on its weight and horsepower. This empirical formula provides a quick estimation of performance potential for drag racing vehicles.
The calculator uses the Drag Racing ET equation:
Where:
Explanation: The equation calculates the estimated quarter-mile time based on the power-to-weight ratio of the vehicle, with an empirical constant that accounts for various factors affecting drag racing performance.
Details: Accurate ET estimation is crucial for drag racers to predict vehicle performance, compare different setups, and set realistic performance goals before hitting the track.
Tips: Enter vehicle weight in pounds, horsepower, and the empirical constant (default is 5.825). All values must be valid (weight > 0, horsepower > 0, constant > 0).
Q1: How accurate is this ET estimation?
A: This provides a rough estimation. Actual performance depends on traction, aerodynamics, transmission efficiency, and driver skill.
Q2: What is a typical constant value?
A: 5.825 is commonly used, but this may vary based on vehicle type and conditions. Experienced racers may adjust this value based on their specific setup.
Q3: Does this work for all types of vehicles?
A: This formula works best for rear-wheel drive vehicles with good traction. Front-wheel drive and all-wheel drive vehicles may require different constants.
Q4: Should I use wheel horsepower or engine horsepower?
A: For most accurate results, use wheel horsepower as this represents the actual power reaching the ground.
Q5: How does weight affect ET?
A: Weight has a significant impact on ET. Reducing weight typically improves ET more than adding equivalent horsepower.