1 Power outp ut and torqu e chart fo r the Cayman
2 Power output a nd torque cha rt for the Cayman S
3 Engine, gearbox, a nd exhaust system of the Cayman S
4 Cayma n S engine
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InformationProvidedby:
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Engine
Resonance Intake Manifold
The new boxer engines benefit from
the resonance effect. It’s used to
oscillate the air mass inside the intake
manifold for improved air induction. In
turn, it helps optimize the formation of
the air/fuel mixture. In the Cayman S,
the manifold is also equipped with
a switchable resonance valve.
The results are high torque, a uniform
torque curve, and high power output.
The sound produced is characteristically
resonant and deep.
Direct Fuel Injection (DFI)
In both new Cayman engines, Direct Fuel
Injection (DFI) is standard. Multi-hole
injectors deliver fuel directly into the
combustion chamber with millisecond
precision. The injection pattern has been
optimized for torque, power output, fuel
consumption, and emissions. Combustion
is even more effective as a result.
With direct injection, the engine
management system regulates injection
timing individually for each cylinder as
well as the injection rate for each cylinder
bank. This optimizes the combustion
process and therefore fuel economy.
Depending on the engine operating
condition, multiple fuel injections take
place so that the catalytic converter
reaches normal operating temperature
sooner after a cold start and a greater
top-end torque can be achieved.
DFI improves the internal cooling of
the combustion chamber by having the
mixture prepared directly in the cylinder.
This allows for a higher compression
ratio, which helps to deliver greater power
output at the same time as enhanced
engine efficiency. Injection is regulated
by the electronic engine management
system and emissions are monitored
by the stereo lambda sensors, thus
helping to protect the environment.
VarioCam Plus
By adjusting the intake camshafts
and switching the lift of the intake
valves, VarioCam Plus transforms the
characteristics of the engine. So much
so, it’s like getting two engines in one.
The system first differentiates between
driver inputs that typify normal,
everyday driving and those inputs
that demand maximum performance.
The electronic engine management
system then imperceptibly adapts valve
operation to the prevailing conditions.
This results in instant acceleration
and extremely smooth running.
In short, VarioCam Plus provides
excellent acceleration power with
comparatively low fuel consumption.
Integrated Dry-Sump Lubrication
A reliable oil supply is the lifeblood
of a performance engine. In the new
Cayman and Cayman S, the engines
are supplied oil via integrated dry-sump
lubrication. It ensures a reliable supply
of oil even when a sporty driving style is
adopted and the vehicle is experiencing
powerful lateral acceleration. It also
has additional cooling functions.
The oil tank is located in the
engine, thereby eliminating the
need for an external oil tank and
saving space and weight.
To reduce power losses and increase
efficiency, an electronically controlled
oil pump supplies the lubricating
points inside the engine as and when
required. It optimizes the supply
of oil, improves fuel economy, and
thereby reduces emissions levels.
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Efficiency Technologies
Heat is the enemy of performance.
The intelligent thermal management
system in the Cayman models regulates
the temperature in the engine and
gearbox to reduce friction losses that
occur during the warm-up phase.
Thanks to the purposeful control of
heat flow and on-demand, gradual
activation of the various cooling
circuits, the engine and gearbox warm
up to normal operating temperature
more rapidly. The resulting reduction
in friction also results in more
efficient fuel consumption and CO
emissions. During sporty driving,
thermal management also acts to
2
reduce temperatures so as to maintain
a high degree of performance.
Our cross-flow cooling system, originally
developed for Porsche race cars to fight
the extreme temperatures encountered
in endurance races, supplies each
engine cylinder uniformly with coolant.
It protects all valves against thermal
overload and premature wear. This
helps improve combustion and helps
keep emissions, fuel consumption,
and noise comparatively low.
Exhaust System
In the new Cayman models, each cylinder
bank has its own stainless steel exhaust
tract. Downstream of their respective
rear silencer, the tracts converge in a
connecting tube and a single (Cayman)
or twin (Cayman S) tailpipe. The stereo
lambda sensor circuitry controls and
monitors each cylinder bank separately.
For each exhaust tract, four corresponding
oxygen sensors regulate the composition
of the exhaust gas and monitor the
performance of the catalytic converters.
The separate tracts enable the exhaust
gas to flow more freely. The resulting
reduction in pressure loss has a positive
impact on power output, torque, and
the unmistakable engine sound.
Available as an option for the new Cayman
models is the sport exhaust system
including Sport tailpipe. It produces an
even more resonant Porsche sound.
1 Standa rd tailpi pe of the Cayman S
2 Standard tailpipe of the Cayman
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Engine
35 34
Engine Management
An electronic engine management
system regulates all engine-related
functions to achieve optimal engine
performance at all times. The engine
operates near the peak of its power
and torque output across a wide
rpm range with comparatively low
fuel consumption and emissions—
whatever the driving style.
One example is the cylinder-specific
knock control. Since engine cylinders
never all work under exactly the same
conditions, the knock control function
monitors each one separately. To help
protect the cylinders and pistons at high
engine speeds and loads, the ignition
point is shifted individually, as and when
necessary. The onboard diagnostics
detect any faults and defects that
may occur in the exhaust and fuel
systems and then display them on the
onboard computer. This also helps to
avoid increased pollutant emissions
and unnecessary fuel consumption.
Auto Start Stop Function
A standard feature of the new Cayman
engines is the Auto Start Stop function.
A fuel-saving innovation designed
primarily for use in urban traffic, it
works automatically, switching off
the engine when you stop, selecting
Neutral, and releasing the clutch
pedal. When equipped with the
optional Porsche Doppelkupplung
(PDK) transmission, engaging the
Auto Start Stop is simply a case of
applying and holding the brake pedal.
In Auto Start Stop mode, all audio and
communication systems remain on. The
engine instantly and seamlessly restarts
as soon as you operate the clutch or,
in cars with PDK, release the brake.
Auto Start Stop can be deactivated and
reactivated using a separate button
on the center console. The function is
deactivated automatically under particular
circumstances—in the event of extreme
outside temperatures, activation of the
Sport button, or low battery charge.
1 Auto Start Stop button
2 Spor t but ton
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37 36 Drive
Sport Button
What happens when you press the Sport
button on the center console? Sport mode
is activated, instantly tuning the engine
dynamics for enhanced performance.
The engine response to commands
from the accelerator pedal is even
more direct and immediate, and the rev
limiter is adjusted to a harder setting.
At the same time, the Auto Start Stop
function is deactivated automatically.
With the optional Porsche Doppelkupplung
(PDK), the shift points are reconfigured
to offer higher and even sportier
rpm bands. Shift times are reduced
and gearshifts become firmer and
more immediate, while throttle-blip
downshifts are accompanied by an even
more emotive engine sound. Coasting
mode is deactivated automatically.
Electrical System Recuperation
Another efficiency-enhancing feature of
the new Cayman models is intelligent
electrical system recuperation. It takes
the energy created from the forces
of braking and uses it to recharge
the vehicle’s battery. Thanks to this
selective recharging, when you request
full driving power, the maximum
possible output of the engine can be
directed straight to the road because
the electrical systems are supplied
mainly by the energy that was stored in
the battery during the braking phase.
Servicing
In the Cayman models, the generator
and air-conditioning system are driven
by a single self-adjusting belt. The
drive chains on the camshafts do not
normally require servicing. With the
sole exception of the spark plugs, the
ignition system is also maintenance-free.
In short, longer service intervals means
the pleasure of driving is uninterrupted.
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