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Horsepower Design Equations and Formulas Calculator

Automobile - Car - Truck


Solving for the change in engine or motor horsepower performance using the trap speed method.

change in engine or motor horsepower performance using the trap speed method

This method uses the speed or velocity at the end of 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. Power will need to be measured before and after performance or after market parts have been installed.


Inputs:

vehicle weight 
speed or velocity before modification 
speed or velocity after modification 


|

Conversions:

weight = 0    = 0  pound
velocity1 = 0    = 0  mile/hour
velocity2 = 0    = 0  mile/hour


Solution:

change in horsepower (hp)  =  HAS NOT BEEN CALCULATED 


Other Units:



Change Equation
Select an equation to solve for a different unknown

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Speed Speed - revolutions per minute (rpm)

estimate engine or motor horse power for cars, trucks and motorcycles
trap speed method Estimate of engine horsepower after a quarter mile run using the trap speed method.
increase in engine horsepower Determine the increase in engine horsepower when an after market modification, race or performance part has been installed with trap speed.
ET method Calculate engine horsepower after a quarter mile run using the ET method.
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Dyno correction factor Dyno correction factor. Factor corrects horsepower for normally aspirated internal combustion engine to a standard humidity, pressure and temperature after dynamometer measurement.
vehicles power to weight ratio Calculate a vehicles power to weight ratio. Acceleration is related to the ratio.


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