When it comes to increasing performance and reducing consumption, it is vital to look at every detail. Which is precisely what Porsche engineers do. For example, by developing VarioCam Plus – a system that combines variable valve timing with two-stage lift on the inlet side. The resulting benefits include greater power and torque, as well as smoother running, better fuel economy and fewer exhaust emissions.
Essentially, VarioCam Plus creates two engines out of one, switching seamlessly between them in response to driver inputs. All operations are controlled by the engine management system, which ensures rapid acceleration and smoother running. The two-stage valve lift mechanism on the inlet side includes a series of electro-hydraulically switchable tappets. To improve responsiveness when starting from cold, VarioCam Plus will raise the amount of lift and retard the valve timing. At medium revs and minimal load, the valve lift is lowered and timing advanced to help minimise fuel consumption and emissions.
To achieve maximum power and torque, the lift is raised and the timing advanced.
In line with international standards, on-board diagnosis (standard on all models) detects potential faults and defects in the exhaust and fuel system and provides prompt alerts.
We are also reducing noise emissions. To achieve the distinctive Porsche sound we optimise the entire vehicle by eliminating unwanted noise at source. Through component rigidity and light, temperatureresistant materials, the play of parts and therefore mechanical noise is minimised at every stage without resorting to engine encapsulation. Additional measures, such as large-volume silencers and air intake systems, reduce noise emissions further across the entire life of the engine.