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The Elapsed Time (ET) Method
This method uses the vehicle weight and the elapsed time (ET) to finish a quarter mile (402.3 meters) on the formula of
| Horsepower = | Weight |
| (ET/5.825)3 |
The Trap-Speed Method
This method uses the vehicle weight and the speed at which the vehicle finished a quarter mile (402.3 meters) on the formula of
| Horsepower = Weight×( | Speed | )3 |
| 234 |