The four-liter twin-turbo V8 engine of the #gt63s is uprated by the #brabus powertrain engineers with the sophisticated #brabus PowerXtra B40S-800 performance upgrade.
The modifications to the engine hardware involve the turbocharging system: Two newly designed #brabus high-performance turbochargers with larger compressor unit and modified core assembly with reinforced axial bearing produce a maximum boost pressure of 1.6 bar.
Recalibrating the boost-pressure control and further optimizing the power delivery without impairing the durability required reprogramming the mapping of the electronic engine control unit. To this end, #brabus conducted extensive testing on stationary engine test benches of the latest generation. At the same time, road testing was conducted on racetracks and in traffic. The new software is introduced into the ECU by the plug-and-play #brabus PowerXtra auxiliary control unit.
This results in an output increase by 118 kW / 161 hp (158 bhp) and a bump in torque by 100 Nm (74 lb-ft). With a new output of 588 kW / 800 hp (789 bhp) at 6,600 rpm and a peak torque of 1,000 Nm (737 lb-ft) at a low 3,600 rpm, the four-door coupe is one of the most powerful of its kind.
