Automobile Car Truck Design Formulas

Solving for the change or increase in engine or motor horsepower performance using the ET method.

This method uses the elapsed time needed to complete a quarter mile run. It is used to give an estimate of vehicle(car, truck, motorcycle) engine horsepower. Weight should include the mass of the vehicle, driver and passenger. Times will need to be measured before and after performance or after market parts have been installed.

vehicle weight

= 0

= 0

pound

quarter mile time before modification(ET1)

= 0

= 0

second

quarter mile time after modification(ET2)

= 0

= 0

second

change in horsepower (hp)

= NOT CALCULATED

Select to solve for a different unknown

Engine horsepower estimate using quarter mile elapsed time Includes plot and graph |

rotating horsepower

Rotating horsepower | |

Torque | |

Speed - revolutions per minute (rpm) |

estimate engine or motor horse power for cars, trucks and motorcycles

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