2010 PORSCHE BOXSTER S torque

· 36 ·· 37 ·
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 emis-
sions. 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 corre
-
sponding camshaft.To improve throt tle response
during the warm-up phase, Vario -
Cam Plus selects high valve lifts
with retarded valve timing. In the
middle and low load ranges, low
valve lifts with advanced timing
Boxster | Drive
reduce fuel consumption and
exhaust emissions. High valve
lifts generate high torques and
maximum output.
VarioCam Plus Boxster S and Boxster
Ignition system.
The ignition system in the Boxster
models is designed for high-
voltage static distribution. The
individual ignition coils, located
on the spark plugs for optimum
ignition reliabilit y, are controlled
directly by the engine electronics.

· 38 ·· 39 ·
Exhaust system.
The exhaust system – with t win
tailpipes on the Boxster S – is
made of stainless steel. Until it
converges in the connecting tube,
the exhaust gas is channelled
through t wo separate tracts and,
thanks to separate exhaust gas cleaning systems, the exhaust
gas can flow more freely – for
increased power and torque.
The stereo lambda control

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 con
-
version of pollutants in the cata -
ly tic converters.
A sports exhaust system – for a
more resonant sound – is avail -
able as an option for each of the
Boxster models.
Boxster | Drive
Servicing.
Every Porsche is designed with
durabilit y in mind. On the Boxster
models, this is reflected in the
lengthy service intervals. The alternator, power steering
pump and the air- conditioning
compressor are all driven by a
single self-adjusting belt. The
drive chains on the camshafts
and intermediate shaf ts do not
normally require servicing. With the sole exception of the
spark plugs, the ignition system
is also maintenance-free.
So your Boxster remains where
it belongs for as long as possible:
on the road.
Boxster S exhaust system
Boxster S twin tailpipe
Boxster tailpipe

· 42 ·· 43 ·
The optional Porsche Doppel-
kupplung (PDK), with both man -
ual gearshift 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

For people who have no time to spare.
Even when changing gear.
Porsche Doppelkupplung (PDK).
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.
This double clutch provides an
alternating, non-positive connec -
tion bet ween the t wo half gear -
boxes 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 con
-
ventional 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,
Boxster | Drive
which contains the even gears
(2, 4, 6).
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.
4
6
2
1
R
7 3
5
Porsche Doppelkupplung (PDK)
Boxster S

· 44 ·· 45 ·
Under oil pressure, clutch 1
closes and forms a frictional
connection with input shaf t 1.
The torque is now transmit ted
through the first half gearbox
– and then the dif ferential – to
the rear axle. At this stage,
PDK has already preselected
the next gear in the second
half gearbox. Engine torque
is already acting on the other
outer disc carrier and, in
response to a gear change
signal, the overlap shift is initi -
ated, i.e. as clutch 1 opens,

clutch 2 closes. The non-positive
connection with input shaft 2
is
established, and power is
trans
mit ted to the wheels.
The gear which is engaged is
displayed on the instrument
cluster.
Depending on the gearshift
programme, the gear change
is optimised for comfort or for
sport y handling and takes place
in a mat ter of milliseconds.

The advantage over a fully manual
transmission is the considerably
faster rate of acceleration for the
same rate of fuel consumption.
Boxster | Drive
The advantage over a fully auto -
matic transmission
is the per -
ceptible increase in driving
dynamics – with a similar level of
comfort, and a distinct reduction
in fuel consumption.
The com -
pact dimensions of the gearbox
reduce rotational
masses which
means a more direct engine
response, and the system is
more lightweight.
PDK function diagram
This, along with the long-ratio
7th gear, helps to achieve
reduced fuel consumption and
emission figures comparable with
those of a manual gearbox.
With the optional Sport Chrono
Package, PDK is enhanced by
the
‘Launch Control’ and ‘motor-
sport- derived gearshif t strategy’
functions (p. 57). In essence, PDK combines sport
i
-
ness with efficiency and comfort.

What does all this mean for you?
Uninterrupted driving pleasure.
Multi-plate clutch 1
Multi-plate clutch 2
Semi -gearbox 2
(2nd, 4th, 6th gear)
Rear semi-gearbox 1
(1st, 3rd, 5th, 7th, R gear)
Differential
Motor
Rear wheel
Rear wheel
Boxster

· 56 ·· 57 ·
Sport Chrono Package.
The Boxster combines open -top
driving with performance which
at Porsche has its origins on the
racetrack.
As an option, for both models we
offer the Sport Chrono Package
which enables even sportier tuning
of the chassis and engine and
guarantees even more driving
pleasure.
Selecting the SPORT but ton

on the centre console activates
‘Sport ’ mode, which makes
throt tle the response significantly
more immediate, adjusts the
rev-limiter to a harder set ting,
and tunes the engine dynamics
for performance driving.
The optional Porsche Active

Suspension Management (PASM)
also switches to ‘Sport ’ mode,
which of fers harder damping and
more direct steering and, there-
fore, bet ter road holding.

With the optional PDK in auto -
matic mode, gearshif t points are
delayed until the upper rev range.
The shif t times are shorter, the
gear changes sportier. At low rates
of deceleration, the system
initiates a swif ter, brake-induced
downshift. In manual mode, gear
changes are faster and more
dynamic.
In ‘Sport ’ mode, the PSM (p. 63)
intervenes later for increased
longitudinal and lateral dynamics.
PSM now affords greater
manoeuvrabilit y under braking
and exit acceleration, especially
at low speeds.
For maximum dexterit y, PSM can
be set to standby while the car is
still in ‘Sport ’ mode (p. 63). For
safet y, it is set to intervene auto -
matically only when ABS assist -
ance is required on both the front
wheels.
A key component of the Sport
Chrono Package is the swivel-
mounted in the centre of the
dashboard with analogue and
digital display.
In combination with the optional
Porsche Doppelkupplung (PDK),
the Sport Chrono Package of fers
t wo additional functions that
are activated by the SPORT PLUS
but ton.
First, ‘Launch Control’, which
ensures you achieve the fastest
possible rate of acceleration
from a standing start – on the
race track, for example. ‘Launch
Control’ is operated via the
SPORT PLUS but ton with the ‘D’
or ‘M’ drive position selected.
Whilst the driver depresses the
brake pedal with the left foot,
the right foot depresses the
accelerator pedal to the floor.
With the accelerator in the kick -
down position, the system
detects the driver’s request for
Launch Mode and revs the
engine to an optimum speed of
approximately 6,500 rpm.
Boxster | Chassis
Engine torque increases and the
clutch closes slightly. The mes -
sage ‘Launch Control ’ appears
in the display on the PDK steer -
ing wheel. The driver now quickly
releases the brake – and pre -
pares for maximum acceleration.

Second, the ‘motorsport- derived
gearshif t strategy’. Using this,
PDK is geared up for maximum
shif t speed, the shortest possible
shif t times and optimum shif t
points for maximum acceleration
– ideal for the racetrack.
Sport Chrono Package Plus.
On request, the optional Porsche
Communication Management
(PCM, p. 83) can be combined
with the Sport Chrono Package
Plus. In addition to the functions
of the Sport Chrono Package,
it includes a personal memory
function in the PCM and a per-
formance display for evaluating
lap times.
Throttle response
in ‘Normal’ mode
Throttle response

in ‘Sport’ mode
Both sets of characteristics
are dependent on engine
speed.
Pedal travel (%)
(%)
Torque
(as percentage of maximum)
Sport Chrono stop watch
Comparison of electronic and throttle maps for ‘Normal’ and ‘Sport’ mode
‘SPORT’ but ton and ‘SPORT PLUS’ but ton on centre console

· 126 ·· 127 ·
Boxster | Technical data
Technical data
Boxster Boxster S
Weights
Manual / PDK Manual / PDK
Unladen weight (DIN) 1.335 kg / 1.365 kg 1.355 kg / 1.380 kg
Unladen weight (EC)
1)1.410 kg / 1.440 kg 1.430 kg / 1.455 kg
Permissible gross weight 1.635 kg / 1.670 kg 1.645 kg / 1.675 kg
PerformanceManual / PDK (SPORT PLUS)2)Manual / PDK (SPORT PLUS)2)
Top speed km/ h (mph) 263 (163 mph) / 261 (162 mph)274 (170 mph) / 272 (169 mph)
0 –100 km/ h (0 – 62 mph) 5.9 secs / 5.8 secs (5.6 secs)
2)5.3 secs / 5.2 secs (5.0 secs)2)
0 –160 km/ h (0 –99 mph) 13.6 secs / 13.4 secs (13 1 secs)2)11.6 secs / 11.4 secs (11.1 secs)2)
Flexibilit y (80 –120 km/ h)
(50 –75 mph) in 5th gear
In -gear acceleration (80 –120 km/ h)
(5 0 –75 m p h) 7.6 secs / 7.5 secs
– / 3.8 secs
6.5 secs / 6.3 secs
–
/ 3.2 secs
Fuel consumption /emissions3)Manual / PDK Manual / PDK
Urban in l/100 km (mpg) 13.8 (20.8) / 13.6 (20.5)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 (g/km) 221 / 214223 / 221
Dimensions /aerodynamics
Length 4.342 mm4.342 mm
Width (including exterior mirrors) 1.801 mm (1.952 mm)1.801 mm (1.952 mm)
Height 1.292 mm1.294 mm
Wheelbase 2.415 mm2.415 mm
Luggage compartment volume ( VDA)
front/rear150 l / 130 l 150 l / 130 l
Tank capacity (reserve fuel) approx. 64 lapprox. 64 l
Drag coef ficient manual/PDK c
w = 0.29/0.30manual/PDK cw = 0.30/0.31
Boxster Boxster S
Engine
Ty p e Boxer Boxer
Installation mid - mounted mid - mounted
No. of cylinders 6 6
Displacement 2.893 cm
33.436 cm3
Max. power (DIN)
at rpm188 kW (255
hp)
6.400 228 kW (310
hp)
6.400
Max. torque
at rpm 290 Nm
4.400–6.000 360 Nm
4.400–5.500
Compression ratio 11.5 : 1 12.5 : 1
Transmission
Layout Rear-wheel drive Rear-wheel drive
Manual transmission 6-speed 6-speed
PDK (optional) 7-speed 7-speed
Chassis
Front axleMcPherson-strut suspension McPherson-strut suspension
Rear axle McPherson-strut suspension McPherson-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 4 - piston aluminium monobloc fixed
calipers front and rear, discs
internally vented and cross- drilled 4 - piston aluminium monobloc fixed
calipers front and rear, discs

internally vented and cross- drilled
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
Ty res
Front:
205/55 ZR 17
Rear: 235/50 ZR 17 Front:
235/40 ZR 18
Rear: 265/40 ZR 18
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) With SPORT PLUS but ton in conjunction with the optional Sport Chrono Package or Sport Chrono Package Plus.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 of fer. They are intended solely as a means of com -
paring dif ferent t ypes of vehicle. You can obtain further information about individual vehicles from your Porsche Centre. The fuel consumption
has been calculated based on a vehicle with standard equipment. Optional equipment may af fect fuel consumption and per formance.