Dr Theilemann explained in detail how the power output of the new Porsche 911 GT2 has been raised to 390 kW, (50 hp more than a 911 Turbo) by redesigning the intake system using WAVE. Torque was also raised from 620 Nm to 680 Nm, something the existing model could only achieve on overboost. Porsche also needed to achieve a similar maximum torque speed to that of the 911 Turbo. “But fuel consumption,” emphasised Dr Theilemann, “had to remain at the same excellent level as the 911 Turbo.”
Porsche approached this task by modelling a new intake system using WAVE. However, what would normally be a straightforward task in a normally aspirated engine is more difficult to simulate in a highly optimised turbocharged engine. Any virtual model needed to simulate the relationships between exhaust gas temperature, knock and air-fuel ratio.
