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Power measurement with a GPS dyno

7 May 2025 · 2 min read

At MTG AUTO SPORT, we use a GPS dyno to accurately measure your vehicle's performance in real-world conditions. Unlike roller dynos, this technology gives results closer to reality, as it takes into account aerodynamics, weight and driving conditions.

Power measurement with a GPS dyno

Why a GPS dyno?

  • Accuracy in real-world conditions : the measurement is taken on the road, where your vehicle actually drives.
  • Torque and power measured directly on the road, without removing anything.
  • No drivetrain constraints : no straps or rollers as on a conventional dyno.
  • Before / after remapping : the gains are measured, not just claimed.
  • Power loss detection : an engine that isn't delivering what it should is spotted straight away.

How does it work?

  • Installation of the GPS module and the necessary sensors.
  • Measurement of performance in real-world conditions: acceleration, torque, power.
  • Analysis of the data and generation of a detailed report.
  • Before / after comparison of the remap to validate the gains.

The advantages of our GPS dyno

  • Superior accuracy for tailored tuning
  • More reliable results on high-power vehicles
  • Fewer risks linked to tyre wheelspin
  • Real-world driving conditions taken into account
  • Compatible with all types of vehicle: FWD, RWD, 4×4

When do we use it?

Before and after a remap

During a engine remapping Stage 1, 1+ or 2 remap, the before / after measurement lets you verify the result achieved in practice.

To fine-tune an E85 conversion

Some E85 Flexfuel conversions require a GPS dyno session to fine-tune the map precisely.

For an engine health check

An abnormal loss of power can reveal a problem. Combined with an electronic diagnostic, the measurement helps to find the cause.

Want to know your vehicle's real power output?

Book an appointment at our workshop in Ballancourt-sur-Essonne (91) or request a quote.

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