Weight is as the car sits on the line: driver and gas in it. … The velocity or speed of a vehicle measured in the trap at the end of a quarter mile run. See my Free Android Drag Racing Calculator App in the Google Play Store Do you have a high performance car, motorcycle, truck or vehicle, built a new engine, performed a tune up or installed a performance part? Let us say that you are driving at a constant of 7.3751, have a 1,000-pound car, and have 94 hp. Calculators to find 1/4 mile ET and MPH. The following two calculators can be used to estimate the engine horsepower of a vehicle based on the weight of the vehicle, elapsed time, and speed used to finish a quarter mile run. JavaScript must be enabled in your browser for the calculation to work. This is just the HP necessary to sustain that speed, not what your engine total HP … Let us say that you are driving at a constant of 7.3751, have a 1,000-pound car, and have 94 hp. This calculator will calculate the approximate 1/4 mile time and trap speed of your vehicle. Vehicle weight should include not only the vehicle, but also the driver, the passenger, and anything else of significant weight. Calculate Rear End Gear Ratio: Enter the tire diameter in inches, rpm's of the motor at a certain speed as indicated by your speedometer in mph. Engine Horsepower (HP) Change Calculation. Try out this calculator get a rough estimate of horsepower. Not a substitude for actual testing. This calculator can be used to compute horsepower according to its definition and to convert between different power units. Horsepower Calculator. The answers below will be for at sea level and standard pressure/temperature. This calculation assumes the car's transmission is in drive or 1:1 ratio, no overdrive. This calculator computes the estimated engine or motor horsepower from trap speed. Horsepower Calculator from 1/4 mile time, Trap Speed & Weight This calculator will estimate the amount of horsepower a car is generating at the flywheel from the car's 1/4 mile time, trap speed and weight. Vehicle weight in pounds (including driver) Uses Cd (coefficient of Drag) and Square Foot Area of your vehicle to calc how much HP would be needed to run a certain speed. This calculator estimates your 60 foot, eighth and quarter mile elapsed times and trap speed when given the weight of the car and flywheel or wheel horsepower. lbs. Tire diameter in inches JavaScript must be enabled in your browser for the calculation to work. Enter vehicle weight - This can be done by entering value or using the up and down arrows to step the number field, Enter speed or velocity - This is how fast the automobile is going at end of the 1/4 mile run or trap. The horsepower the electric, diesel or gasoline engine is capable of producing. Weight is as the car sits on the line: driver and gas in it. A 14% driveline loss is assumed for Wheel HP. Horsepower! When you choose torque, this calculator will measure the approximate torque of an engine based on the horsepower, multiplied by 5,252 (conversion between foot-pounds and horsepower), divided by the RPM of the engine. (THIS IS JUST AN ESTIMATE BASED ON Inspect/analyze calculations and results in parameters, charts and graphs. When you choose horsepower, this calculator will measure the approximate horsepower of an engine based on the torque of the engine (measured in foot-pounds) multiplied by the RPM of the engine, divided by 5,252 (conversion between foot-pounds and horsepower). Whether you are test driving your brand new car, or just going for a quick jog or cycle, if you want to know how to find average speed, this calculator will come in handy..