Porsche Cayman User Handbook Manual page 19

Ignition system. arrangement means they can
also be integrated with other
The ignition system in the Cayman electronic-based systems. If the
and Cayman S features static optional Tiptronic S, for example,
high-voltage technology. Separate requests smoother downshifts,
coils on each of the plugs ensure the system responds within a
perfect ignition every time. With fraction of a second and adjusts
no central coil, there is no need the ignition timing.
for leads, which are a frequent
source of faults. All six coils are
directly controlled by the engine
management system. This
Single-tube tailpipe (Cayman)
Cylinder-specific knock control.
Since temperatures tend to
vary across the engine, each
cylinder is monitored separately
for unwanted pre-ignition of the
air/fuel mix. If a risk is detected
in one or more cylinders, the
timing is adjusted on the
corresponding spark plug.
The system is effective under
all engine conditions, including
extremely heavy loads at low
rpm.
Exhaust system.
Both Cayman models have a
specially designed stainless steel
exhaust system. Gas is passed
from each bank of cylinders
through twin cross-linked silencer
Exhaust system
units and exits the car through
a central tailpipe. A system of
four oxygen sensors – one before
and one after each of the two
pre-catalytic converters – provides
separate monitoring of the gas
composition and catalyst
performance for each cylinder
bank.
Dual-tube tailpipe (Cayman S)
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Since a twin-tract layout allows a
Servicing.
higher rate of throughput than a
conventional exhaust, the system Regular servicing is extremely
also has a positive impact on important on any high-precision
overall power and torque. It also machine. In the case of a
contributes to the distinctive Porsche, it is equally important
engine sound – on starting, at to give you maximum enjoyment
idle and across the entire engine from your car. We therefore aim
speed range. to reduce servicing requirements
and extend all service intervals.
For even more powerful acoustics,
both cars can be equipped with The generator, power-steering
an optional sports exhaust system. pump and air-conditioning
compressor are all driven by a
single, self-adjusting belt. Under
normal usage, the drive chains
for the cam and auxiliary shafts
The new Cayman and the Cayman S |
are entirely maintenance-free.
The ignition system is also
maintenance-free, with the sole
exception of the spark plugs
(60,000 miles). The engine oil
interval is 20,000 miles, while
hydraulic tappets provide
automatic clearance adjustment
on each of the 24 valves.
In short: when we design a car
for the road, that's where we
intend it to stay.
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Drive
Cayman