Zeitenjagd Power Calculator

This app allows you to accurately determine the engine power of cars and other vehicles with combustion engines.

This requires at least a 10Hz GPS measurement of the time intervals using a measuring device such as Dragy, Pgear, or Racebox.

Note: Every calculation paid for with a token is automatically saved as an image and a PDF!

> Image: Gallery/Time Trial
> PDF: Downloads/Time Trial

What can be analyzed?

e.g., 100-200, 200-250, 200-300, or any custom run

> Any interval from 60-300 km/h can be calculated.

Important: The measuring device must output the intervals in 10 km/h increments!

A total time of, for example, 80-190 km/h is not sufficient.

What is entered into the app?

> The vehicle's weight during the run!

> ☐ > Weight of the driver or passengers during the run

> Drag coefficient (Cd) and frontal area of ​​the vehicle (if not available, you will need to find this information online or with the manufacturer)

> Air pressure in mbar > IMPORTANT! Not the corrected air pressure at sea level (NN), but the local pressure at the measurement altitude. Almost every mobile phone now has a built-in barometer.

> Temperature on the day/location of the measurement

> Slope in % > Important! The elevation profile must be level or a constant uphill or downhill slope! In Pgear, for example, the 100-200/200-250/60-160 time intervals can be set to 0% using the correction enable function. This provides the simplest input, as everything is corrected to 0%.

> Interval time input: The interval time, e.g., 150-160, must be entered. In Dragy, this means you have to determine the individual time intervals yourself.

> Gear selection for the intervals is important for the calculation!

> Gear selection for the intervals is important for the calculation! Performance curve analysis (as on a dyno):

- Measurement as on a dyno, e.g., only in 4th or 5th gear.

- Measure interval times from, e.g., 3000-6800 RPM in 4th gear.

- Enter the GPS km/h at 3000 RPM in the measured gear using the additional option "Calculate RPM + Nm optional."

For comparing two cars or a before-and-after comparison, e.g., from stock to Stage 1, the option "2 vehicles/comparison" can be used.