A commonly asked question is:

“What’s the difference between a normal map and a dyno?”

In this section, we will outline the dyno tuning process, step by step.

Once the vehicle arrives, the engine bay is inspected, hoses, belts and fluid levels. Tyre pressures, condition, tread depth. The suspension is visually inspected and then we conduct a full diagnostic scan using one of our tools. (VAGCOM, Bosch ESI, HPtuners, Autocom etc).

On completion of these checks, the vehicle is taken for a test drive.

After the test drive, the vehicle is then put on to our inhouse MAHA dyno and securely strapped down.

The engine RPM to dyno roller RPM is then calibrated and the first power run is carried out. During the run, data logging of vital parameters including; boost pressure, air mass, fuel rail pressure, ignition timing, boost control duty cycle, AFR etc are recorded.

This data is then examined by a technician. A total of 3 standard power runs are completed. The standard power runs results are saved so a comparison can be made after tuning.

A full read of the ECU data is then taken. Depending on the manufacture and ECU type different protocols and tools are used.
  • OBD – Plugging in to the OBD port.
  • BENCH – Removing the ECU and pinning directly to the ECU
  • BOOT – Removing the ECU, opening it up and taking a read directly from the circuit board.

We have the tools and expertise to do all of these methods.

The changes to the mapping structure are then made by our in house file writer using the programme WinOLS.

This powerful programme allows us to change requested values, raise limiters and perform EGR, 2nd O2 sensor deletes ETC.

The modified file is the uploaded back on to the ECU. Then the data logging and power runs are performed again and examined.
If all the values are within spec, the power graph and a before after graph is printed.
Once completed, a final test drive is conducted.

Our MAHA Dyno allows us to accurately measure:

  • Power output @ wheels (measured in BHP)
  • Torque output @ the wheels (measured in FT/LB or Newton Meters)
  • Power output @ flywheel (measured in BHP)
  • Torque output @ the flywheel (measured in FT/LB or Newton Meters)
  • Transmission losses

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