707 PS (+231 PS) on production hardware with vehicle-specific Lambda‑GT calibration
The GT 55 shares its essential drivetrain hardware with the more powerful GT 63 – including the Bosch MG1CP003 (MRG1V8) engine control unit – and is simply calibrated differently at the factory. This is why it sees the largest gain in the GT range. Lambda‑GT presents further stages under Performance packages.
From the factory, the GT 55 runs with lower boost pressure and a more conservative torque request. Lambda‑GT uses this calibration gap within the thermal and mechanical limits of the installed components. Power build-up and pedal map are reorganised so that the GT 55 feels not only stronger but coherent as a whole.
Before calibration, the existing software and data version of the engine control unit is read out; model year, software version and equipment are taken into account. With a gain of 231 PS, the condition of the specific vehicle matters more than with any smaller stage.
With the largest upgrade in the GT programme, the limiting functions are the most important part of the work. The 707 PS are calibrated within the system architecture that also underlies the GT 63.
Changes are developed against defined targets for performance, driveability and thermal behaviour, verified by measurement and documented. This keeps it traceable which data version is installed in the vehicle.
With a gain of 231 PS, what counts is not the best single run, but the behaviour across several measurements.
The customer receives the certificate for their vehicle – with an upgrade of this magnitude, the decisive proof.
The calibration can also be extended with further functions or performance components – such as adjustments to start-up and idle behaviour, defined sound functions or additional performance parts, integrated into the overall calibration. Examples can be found under Real vehicle projects and Personalised vehicle configurations.
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