Home
Back
Drag Racing Equation:
| From: | To: |
The Drag Racing 8th Mile Calculator estimates the elapsed time (ET) for a vehicle to complete an 1/8-mile drag race based on vehicle weight and horsepower. This calculation helps racers predict performance and optimize their setups.
The calculator uses the drag racing equation:
Where:
Explanation: The equation shows that elapsed time is proportional to the cube root of the weight-to-power ratio, demonstrating how power-to-weight ratio significantly impacts acceleration performance.
Details: Accurate ET prediction is crucial for drag racers to estimate performance, compare vehicle setups, and make informed decisions about modifications and tuning strategies.
Tips: Enter vehicle weight in pounds and horsepower. Use actual measured horsepower if available for best accuracy. All values must be positive numbers.
Q1: Why use this specific equation for 1/8-mile ET?
A: This equation is an empirical formula derived from extensive drag racing data and provides a good estimate for typical drag racing vehicles.
Q2: What factors can affect actual ET compared to calculated?
A: Traction, aerodynamics, transmission efficiency, driver skill, track conditions, and weather can all significantly impact actual performance.
Q3: Should I use wheel horsepower or engine horsepower?
A: For most accurate results, use wheel horsepower as it accounts for drivetrain losses and represents the actual power reaching the ground.
Q4: How accurate is this calculation?
A: It provides a good estimate for planning purposes, but actual track testing is recommended for precise performance measurement.
Q5: Can this be used for different types of vehicles?
A: While primarily designed for drag racing cars, it can provide estimates for other vehicles, though accuracy may vary with different vehicle types.