2011 PORSCHE CAYMAN S fuel

4041
Input dataRegulation/control of
Electronic engine management
ME 7.8/Cayman – SDI 3.1/ Cayman S
Engine load
Lambda sensor signals
Engine speed (from crankshaft)
Inlet camshaft phase angle
Knock sensor signals
Vehicle speed
Air-conditioning settings
Accelerator pedal
Temperatures
– Coolant
– Intake air
– Air in engine compartment
– Engine oil
– Ambient air
Pressures
– Engine oil
– Fuel
– Ambient air
Ignition
Manifold injection (Cayman)/
direct fuel injection (Cayman S)
Heating of Lambda sensors
Fuel pump (Cayman)/
fuel pumps controlled on demand
(Cayman S)
Fuel-tank venting
CAN interface with driving dynamics control, transmission control, immobiliser, instrument cluster, climate control,
SPORT button, SPORT PLUS button, sports exhaust system button, diagnostics, etc.
Valve lift switchover
(VarioCam Plus)
Secondary-air injection (Cayman)
Starter
Throttle-valve angle
Idling via throttle valve
and ignition
Fuel pressure (Cayman S)
Throttle valve
Camshaft position
Engine fan
Continuously variable oil pump
Cayman
same conditions, they are
monitored individually by the
knock control. The ignition point
is shifted individually, as and
when necessary, to protect the
cylinders and pistons at high
engine speeds. The on -board
diagnostics, which are compliant
with European standards, ensure
timely detection of any faults
and defects that may occur in the
exhaust and fuel systems and
notif y the driver immediately. This
also prevents increased pollutant
emissions and unnecessary fuel
consumption.Engine cooling system.
Our cross-flow cooling system,
as used in motorsport, minimises
the engine’s tendency to knock
and ensures comparatively low
emissions, fuel consumption and
noise levels.
Engine management system
with E-Gas.
The electronic engine management
system ensures optimum engine
performance at all times. It regu-
lates all engine-related functions
and assemblies (see diagram).
The results: optimum performance
and torque with comparatively low
fuel consumption and emissions.
Another important function of the
system is cylinder-specific knock
control. Since the six cylinders
never all work under exactly the
Cayman | Drive

4243
Cayman | Drive
VarioCam Plus
To improve throt tle response
during the warm -up phase,
VarioCam Plus selects high valve
lif ts with retarded valve timing.
In the middle and low load ranges,
low valve lif ts with advanced
timing reduce fuel consumption
and exhaust emissions. High valve
lif ts generate high torque and
maximum output.Two-stage resonance
intake manifold.
The intake manifold with double-
flow distributor pipe has an
adjustable flap that closes and
opens at defined engine speeds.
As a result of a t wo -stage
resonance ef fect, the air mass
in the intake manifold begins to
oscillate, which in turn generates
a turbocharging ef fect and
optimises induction. These t wo
ef fects combine to produce
higher torque at low engine
speeds, a flat ter torque curve and
increased power output at high
engine speeds, while the acoustic
properties of the system are
second to none. A sound that is
typically Porsche.
VarioCam Plus.
VarioCam Plus combines variable
valve timing with t wo -stage lift
on the inlet side. This results in
smoother running, bet ter 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 electrohydraulic rotary
vane adjuster at the head of the
corresponding camshaf t.

4849
If you want to get straight to the point,
you don’t take any detours.
Transmission.
Cayman S
This double clutch provides an
alternating, non-positive connection
bet ween the t wo half gearboxes
and the engine by means of t wo
separate input shafts (input shaft
1 is nested inside the hollowed-out
input shaft 2).
The flow of power from the engine
is only ever transmit ted through
one half gearbox and one clutch
at a time, while the next gear is preselected in the second half
gearbox. During a gear change,
therefore, a conventional shif t no
longer takes place. Instead, one
clutch simply opens and the other
closes at the same time. Gear
changes can therefore take place
within milliseconds.
Clutch 1 controls the first half
gearbox, which contains the
odd gears (1, 3, 5, 7) and reverse.
Clutch 2 controls the second,
which contains the even gears
(2, 4, 6).
Porsche Doppelkupplung (PDK).
The optional Porsche Doppel
-
kupplung (PDK), with both manual
gearshif t and an automatic mode,
enables smooth gear changes
with no interruption in the flow of
power. This results in significantly
faster acceleration and lower
fuel consumption, without having
to sacrifice the ease of automatic
transmission. In total, PDK has seven gears
at its disposal. Gears 1 to 6 have
a sports ratio and top speed is
reached in 6th gear. The 7th gear
has a long ratio and helps to
reduce fuel consumption even
f u rt h e r.
PDK is essentially t wo half gear-
boxes in one and thus requires
t wo clutches – designed as a
double wet clutch transmission.
Cayman | Drive

50
46
2
1
R
7 3
5
51
4
6
2
R1
3
7
5
Multi - plate clutch 1
Multi - plate clutch 2
Semi -gearbox 2
(2nd, 4th, 6th gear)
Semi -gearbox 1
(1st, 3rd, 5th, 7th, R gear)
Differential
Engine
Rear wheel
Rear wheel
Porsche Doppelkupplung (PDK) PDK function diagram
is established, and power is
transmit ted to the wheels.
The gear which is engaged is
displayed on the instrument
cluster. Depending on the
gearshif t programme, the gear
change is optimised for comfort
or for sport y handling and takes
place in a mat ter of milliseconds.
The advantages over a fully
manual transmission are very Package, PDK is enhanced by
the ‘Launch Control’ and ‘motor
-
sport- derived
gearshift strategy’
functions (p. 62).
In essence, PDK combines
sportiness with ef ficiency and
comfort. What does all this
mean for you? Exactly what you
would expect: uninterrupted
driving pleasure.
Porsche Doppelkupplung (PDK)
in detail.
The crankshaf t transmits engine
torque to the dual-mass fly wheel
which is then channelled through
the clutch housing and onto the
multi-plate clutches, or to be more
precise, the outer disc carrier.
Under oil pressure, clutch 1 closes
and forms a frictional connection rapid gearshif ts with no
interruption in the flow of power,
which result in a considerably
faster rate of acceleration for the
same rate of fuel consumption.
The advantage over a fully
automatic transmission is the

perceptible increase in driving
dynamics – with a similar level of
comfort, and a distinct reduction
in fuel consumption.
with input shaft 1. The torque is
now transmit ted through the
dif ferential to the rear axle.
At this stage, PDK has already
preselected the next gear.
Engine torque is already acting
on the other outer disc carrier
and, in response to a gear change
signal, the overlap shift is

initiated, i.e. as clutch 1 opens,
clutch 2 closes. The non-positive
connection with input shaf t 2 The compact dimensions of the
gearbox reduce rotational masses
which means that the engine
response is more direct and the
system is more light weight.
This, along with the long-ratio 7th
gear, helps to achieve relatively
low fuel consumption and

emission figures comparable
with those of a manual gearbox.
With the optional Sport Chrono
Cayman | Drive

8081
Cayman S dashboard with optional equipment, including PCM, cordless handset, Tyre Pressure Monitoring (TPM), Sport Chrono Package Plus and PDK
Doppel
kupplung (PDK), as well as
the selected gear. The dial on the
left contains the analogue speed -
ometer with digital trip meter and
total distance display. The design
and legibilit y of the dials are also
enhanced by the white backlight
illumination.as an option is the SportDesign
steering wheel with gearshift

paddles (p. 52).
For extra comfort on those cold
days, steering wheel heating is
also available on request for all
steering wheels (available only in
conjunction with seat heating).
Instruments.
Each black circular dial in the
instrument cluster – aluminium-
coloured in the Cayman S model
– provides important information
at a glance. In the centre is the
analogue rev counter with digital
speedometer and a customisable
display of key data from the
Steering wheels.
The Cayman models feature as
standard a sports steering wheel
with full-size airbag. The steering
wheel is adjustable for height and
reach and the rim is in smooth-
finish leather. As an option, you

can specify a multifunction steering
wheel in leather with integrated
but tons for the most essential
audio and, where applicable,
standard on -board computer.
Additional data, such as average
fuel consumption, fuel range
or the data of the optional TPM
can be shown as desired.
The right-hand dial displays a
range of information, including
the outside temperature and shif t
pat tern of the optional Porsche navigation and telephone functions.
Alternatively, the multifunction
steering wheel is available in
smooth-finish leather, Aluminium
Look, carbon or macassar wood.
Fit ted as standard in conjunction
with Porsche Doppelkupplung (PDK)
is the sports steering wheel with
gearshift switches. A multifunction
version of this steering wheel is
offered as an option. Also available
Cayman | Comfort

100101
Top marks for cleanliness.
each cylinder bank separately,
while another Lambda sensor
on each cylinder bank monitors
pollutant conversion in the respec-
tive cataly tic converter (p. 44).
1)
In an era of intensif ying debate
about global climate change and
CO
2 emissions, every automotive
manufacturer is asking itself
what it has to of fer in terms
of environmental protection. Our
answer has long been the same:
maximum ef ficiency.
Over the last 15 years, Porsche
has managed to reduce the
fuel consumption of its vehicles
by an average of 1.7 % each year.
Improvements in fuel economy
also have a beneficial impact
on CO
2 emissions. This has been
achieved through an ef ficient
drive concept (DFI), light weight
construction, optimum aerody -
namics and low rolling resistance.
The goal? Pure performance – but
not at the expense of the environ -
ment. A goal achieved by the
Cayman models.
Exhaust emission control.
Both engines comply with the Euro
5 emission standard
in Europe and
LEV II/ ULEV in
the USA. Vehicles
manufactured by Porsche demon-
strate that even
high -performance
sportscars can achieve moderate
em issio n
values in their respective
category. In short, the Cayman
is not only sport y, it is also clean.
This at tribute is achieved by
means of a t wo -stage cascade-
t ype cataly tic converter
which comprises t wo monolith
substrates on each of the t win
exhaust tracts. These specially
coated substrates contain
ultra-fine honeycomb channels in
which pollutants are converted
as exhaust gas passes through.
The stereo Lambda control
circuitry controls and monitors
Cayman | Environment
1) Not in markets with leaded fuel.
Cayman models: fuel consumption in l/100 km (mpg) urban 14.1 (20.0) –13.6 (20.8) ·
extra urban 7.1 (39.8) – 6.5 (43.5) · combined 9.5 (29.7) –9.1 (31.0); CO
2 emissions 223–214 g / km

102103
Noise.
The Cayman models comply with
all applicable noise regulations
without any form of engine encap-
sulation. To achieve this, noises
are eliminated at source. Engine
parts are stif f, moving parts are
light weight and tolerances are
kept to a minimum. Large-volume
silencers and resonators in the
air intake system minimise noise
further. For the entire service life
of the vehicle.
Servicing.
Long service intervals of fer
clear advantages. For you: lower
costs and saved time. For the
environment: the use of fewer
consumables and replacement
parts. For full details of service
intervals, please refer to the
separate price list.
Fuel economy and recycling.
At Porsche, a fundamental aspect
of design is intelligent light weight
construction. For both economical
and ecological reasons. This
forms the basis for low fuel con -
sumption values in conjunction
with outstanding performance.
It is economical thanks to the
high proportion of aluminium cast
alloys, plastics and super high-
strength sheet steel used. This
is substantially lighter and more
stable than conventional steel. In
the Cayman models approximately
20 % of components are made
from light weight alloys. We use
only innovative and environmen -
tally friendly components,
and each material is labelled to
facilitate its separation for
recycling. Recycled plastics are
used where they meet exacting
technical requirements. In all, the
Cayman models are approximately
95 % recyclable. In addition, Porsche uses only
environmentally friendly water-
based paints. The Cayman is free
of CFCs and components manu
-
factured using CFCs. This is
because, here at Porsche, environ -
mental protection does not begin
at the end of a vehicle’s life. It
starts at the planning and develop -
ment stage.
Fuel.
The Cayman models are designed
to operate on fuels with an etha -
nol content of up to 10 %. Ethanol
has a positive impact on the CO
2
balance since the plants cultivated
for the production of this biofuel
also absorb CO
2 from the atmos -
phere.
The active carbon filter and
a special coating on the fuel tank
reduce the amount of hydrocar -
bons released from the fuel
system. All fuel lines are made of
aluminium, while vapour- carrying
lines are made from multi-layered
plastic.
Cayman | Environment

134135
Technical data
CaymanCayman S
Weights
Manual/ PDK Manual/ PDK
Unladen weight (DIN) 1, 3 3 0 k g / 1, 3 6 0 k g 1, 3 5 0 k g / 1, 375 k g
Unladen weight (EC)
1)1,4 0 5 k g / 1,4 3 5 k g 1,425 k g / 1,4 5 0 k g
Permissible gross weight 1,6 3 5 k g / 1,670 k g 1,6 4 5 k g / 1,675 k g
PerformanceManual/PDK (SPORT PLUS)2)Manual/PDK (SPORT PLUS)2)
Top speed km/ h (mph) 2 6 5 (16 5) / 2 6 3 (16 3) 27 7 ( 17 2 ) / 27 5 ( 17 1)
0 –100 km/ h (0 – 62 mph) 5.8 secs/5.7 secs (5.5 secs)
2)5.2 secs/5.1 secs (4.9 secs)2)
0 –160 km/ h (0 –99 mph) 13.4 secs/13.2 secs (12.9 secs)2)11.4 secs/11.2 secs (10.9 secs)2)
Flexibilit y
80 –120 km/ h (50 –75 mph) in 5th gear
In -gear acceleration
80 –120 km/ h (50 –75 mph) 7.6 secs/–

–/ 3.7 s e c s 6.5 secs/–

–/3.1 secs
Fuel consumption/emissions3)Manual/ PDK Manual/ PDK
Urban in l/100 km (mpg) 13.8 (20.5)/13.6 (20.8) 13.6 (20.8)/14.1 (20.0)
Extra urban in l/100 km (mpg) 6.9 (40.9)/6.5 (43.5) 7.1 (39.8)/6.6 (42.8)
Combined in l/100 km (mpg) 9.4 (30.1)/9.1 (31.0) 9.5 (29.7)/ 9.4 (30.1)
CO
2 emissions in g / km 221/214223/221
Dimensions/aerodynamics
Length 4,347 mm4,347 mm
Width (including exterior mirrors) 1,801 mm (1,952 mm)1,801 mm (1,952 mm)
Height 1,304 mm1,306 mm
Wheelbase 2,415 mm2,415 mm
Luggage compartment volume ( VDA)
front/rear 150 litres/260 litres
150 litres/260 litres
Tank capacit y (refill volume) 64 litres64 litres
Drag coef ficient 0.29/0.290.29/0.30
Technical data
CaymanCayman S
Engine
Ty p e Horizontally opposed cylinder Horizontally opposed cylinder
Installation Mid - mounted Mid - mounted
Cylinders 6 6
Displacement 2,893 cm
33,436 cm3
Max. power (DIN)
at rpm 195 kW (265
hp)
7, 2 0 0 r p m 235 kW (320
hp)
7, 2 0 0 r p m
Max. torque
at rpm 300 Nm
4,400–6,000 rpm 370 Nm
4,75 0 r p m
Compression ratio 11.5 : 1 12.5 : 1
Transmission
Layout Rear-wheel drive Rear-wheel drive
Manual gearbox 6-speed 6-speed
PDK (optional) 7-speed 7-speed
Chassis
Front axle Light weight spring strut suspension Lightweight spring strut suspension
Rear axle Light weight spring strut suspension Lightweight spring strut suspension
Steering Power-assisted (hydraulic), with
variable steering ratio Power-assisted (hydraulic), with
variable steering ratio
Turning circle 11. 1 m 11. 1 m
Brakes Four-piston aluminium monobloc
fixed calipers front and rear,
internally vented and cross-drilled discs Four-piston aluminium monobloc

fixed calipers front and rear,
internally vented and cross-drilled discs
Vehicle stabilit y system PSM (with ABS 8.0) PSM (with ABS 8.0)
Wheels
Front:
7 J x 17
Rear: 8.5 J x 17 Front:
8 J x 18
Rear: 9 J x 18
Tyres
Front:
205/55 ZR 17
Rear: 235/50 ZR 17 Front:
235/40 ZR 18
Rear: 265/40 ZR 18
3) Data determined in the NEDC (New European Driving Cycle) in accordance with the Euro 5 (715/2007/EC and 692/2008/EC) measurement
method. The figures do not refer to an individual vehicle nor do they constitute part of the offer. They are intended solely as a means of comparing
different types of vehicle. You can obtain further information about individual vehicles from your Porsche Centre. Fuel consumption calculated for
vehicles with standard specification only. Optional equipment may affect fuel consumption and performance.1) Weight is calculated in accordance with the relevant EC Directives and is valid for vehicles with standard specification only.
Optional equipment increases this figure. The figure given includes 68 kg for the driver and 7 kg for luggage.
2) In conjunction with the optional Sport Chrono Package or Sport Chrono Package Plus and with the SPORT PLUS button selected.