9:22 AM
Reave
The latest 911 has a new generation of engines with direct fuel injection (DFI), and significantly more power. 345 hp is generated by the 3.6-liter boxer (horizontally-opposed cylinder) engine and 385 hp by the 3.8-liter power unit.
The results are outstanding performance and increased fuel efficiency and emission values. All made possible thanks to DFI, VarioCam Plus, an improved lightweight construction, reduced friction and a number of detailed technical solutions.
VarioCam Plus combines variable valve timing with two-stage lift on the inlet side. This results in smoother running, better fuel economy and lower exhaust emissions. As well as greater top-end power and low-end torque.
This two-in-one engine concept seamlessly adapts in response to driver input. The result: instant acceleration and extremely smooth running.
The variation in intake timing is steplessly controlled by means of an electro-hydraulic rotary vane adjuster at the head of the corresponding camshaft.
To improve throttle response during the warm-up phase, VarioCam Plus selects high valve lifts with retarded valve timing. In the middle and low load ranges, low valve lifts with advanced timing, increased fuel efficiency and exhaust emissions. High valve lifts generate high torques and maximum output.
Accurate and involving: the six-speed manual gearbox is the link to each and every gear. The cable-operated gearshift unit is designed for optimum progression through the gears and the gear lever is insulated from the engine and gearbox.
The gear lever throw is short and precise, enabling a rapid gearshift action and positive response. An optional short shifter is available from Porsche Exclusive.
In addition, all 911 models have a self-adjusting clutch. In comparison with conventional clutches, this reduces by up to 50% the added release loads that normally occur as the clutch begins to wear.
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