Porsche CAYENNE Brochure page 26

There is one fuel that will always be free.
Which is why we make the most of it.
Air intake system.
The Cayenne models are all The effect is enhanced in
equipped with a resonance air the Cayenne, Cayenne S and
intake system. This simple Cayenne GTS by a two-stage
technology uses the pressure intake manifold. This combines all
waves generated by the inlet the benefits of a long intake tube
valves to 'force' air into the engine. (higher torque at low rpm) with
those of a shorter length (more
power at higher rpm). On the
Cayenne GTS, performance is
enhanced by optimised airflow
management in the intake manifold.
Although 'naturally aspirated',
the Cayenne, Cayenne S and
Cayenne GTS provide high torque
ratings across the entire engine
speed range.
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Pressure is often the key to performance.
Turbocharging system in the Cayenne Turbo.
The Porsche Turbo is synonymous In normal road driving (part-throttle
with performance, exhilarating mode), the pre-throttle boost
acoustics and the finest engineering. pressure is reduced in order
to maximise fuel economy. When
The Cayenne Turbo has twin the car is driven more assertively,
turbocharger units arranged in the turbines are 'pre-spun' so
parallel. The low-volume intake as to increase the pressure
pipes combine with short exhaust available. When the throttle is
manifolds to achieve a rapid, finally opened, the boost can
emphatic response. be applied immediately.
Incoming air is passed through a Both turbo units are cooled by
filter and compressed by the turbine dedicated circuits from the main
units. Its temperature is then engine cooling system.This solution
reduced in the intercooler system,
which improves cylinder charging
and limits thermal loads on the
engine.
Boost pressure reaches 1.8 bar
(absolute pressure) under full
acceleration from just 2,500 rpm.
prevents oil degradation due to
overheating.
For the driver, the result is
seamless delivery of phenomenal
power and torque.
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Drive