2011 PORSCHE BOXSTER S sensor

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Resonance intake manifold.
The resonance effect, where the air
mass inside the intake manifold is
caused to oscillate is used to optimise
the induction process at all engine
speeds. The engine in the Boxster S is
additionally equipped with a switchable
resonance valve.
The results are high torque, a flat ter
torque curve and high power output.
The sound produced is characteristically
resonant and deep, as you would expect
of a Boxster.

Direct fuel injection (DFI).
Direct fuel injection (DFI) is featured
as standard in both Boxster models.
Multi-hole injectors deliver fuel directly
into the combustion chamber with milli -
second precision. The injection pattern
has been optimised for torque, power
output, fuel consumption and emissions.
With direct injection, the engine manage -
ment system regulates injection timing
individually for each cylinder, as well as
the injection rate for each cylinder bank.
This optimises the combustion process
and therefore fuel economy. Depending
on the engine operating conditions, multi -
ple fuel injections can take place on each operating cycle. This allows the cata
-
ly tic converter to reach normal operating
temperate sooner after a cold start and a
higher maximum torque to 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 higher 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.
For fuel consumption and CO
2 emissions please refer to page 127.

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Thermal management.
The Boxster models feature a new version
of thermal management to reduce friction
losses that arise during the warm-up
phase.
Thanks to the selective control strategy
and on-demand, gradual activation of the
various cooling circuits, the engine and
gearbox warm up to normal operating
temperature more rapidly. The conse -
quent reduction in friction also reduces
fuel consumption and CO
2 em issio ns.
During sporty driving, thermal manage -
ment also acts to reduce temperatures
so that a high level of performance is
maintained. Our cross-flow cooling system, as used

in motorsport, supplies each engine
cylinder uniformly with coolant, which
protects the valves against thermal
overload and, therefore, premature wear.
This improves combustion and keeps
emissions, fuel consumption and noise
comparatively low.
Exhaust system.
In the new Boxster models, each cylinder
bank has its own stainless-steel exhaust
tract. Downstream of their respective
rear silencer, the tracts converge into
a connecting tube and a single (Boxster)
or t win (Boxster S) tailpipe. The stereo
Lambda control circuitr y controls and monitors each cylinder bank separately.
For each exhaust tract, four correspond
-
ing oxygen sensors regulate the composi -
tion of the exhaust gas and monitor the
performance of the catalytic converters.
Having separate tracts means that the
exhaust gas can 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 Boxster
models is the sports exhaust system
1)
including sports tailpipe. It produces an
even more resonant Porsche sound.
For ward thrust |
Engine
For fuel consumption and CO2 emissions please refer to page 127.
1) Not available at launch. Please consult your
Centre for availability.
1 Boxster tailpipe
2 Boxster S t win tailpipe

Even when you want to make a break
from everyday life, you should still keep
your feet on the ground.
The chassis of the new Boxster models
are an excellent match for the powerful
engines. Axle components are made
predominantly of aluminium. This light -
weight material helps to keep the weight
of the vehicle and its unsprung masses
low, which reduces fuel consumption,
improves comfort and increases agility.
The wide track is a prominent feature to
provide additional stability and enhanced
comfort, the wheelbase has been extended
by 60 mm compared with that of the
previous model. The new independent
suspension features lightweight spring-strut
a
xles with longitudinal and transverse links
and, at the front, cross members that
have been refined for optimum control.
As a result, each wheel moves precisely
to ensure excellent directional stability
and superior handling in all situations.
What does this mean for the driver? The
sophisticated engineering of the chassis,
combined with the mid-engined layout,
achieves impressive dynamic performance.
Body roll and pitch have been practically
eliminated to offer a level of agilit y that
turns each corner into an incomparable
experience.
A love of freedom is no reason
to lose self-control.
Chassis.
Porsche Active Suspension
Management (PASM).
Optional PASM, the electronic damping
control system, suits the new Boxster
models down to the ground. PASM
actively and continuously regulates the
damping force for each wheel according
to the
road conditions and driving st yle.
In addition, the suspension is lowered
by 10 mm.
The driver can select bet ween t wo
dif ferent modes: ‘Normal’ which is a
blend of performance and comfort,
and ‘Sport ’ where the setup is much
firmer. Depending on the mode selected,
For ward thrust |
Chassis
therefore, PASM can be both sportier
and more comfortable than the standard
chassis. The PASM control unit evaluates
the driving conditions and modifies the
damping force on each of the wheels in
accordance with the selected mode.
Sensors record the body movements that
accompany powerful acceleration, brak -
ing or uneven road surfaces. This enables
intelligent adaptation of damper stif fness
for the selected mode, optimising contact
bet ween each individual t yre and the road
and reducing pitch.

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Porsche Stability Management (PSM).
Enhanced Porsche Stability Management
(PSM) is fit ted as standard. This system
automatically maintains stability even
at the limits of dynamic driving perfor -
mance. Sensors continuously monitor
the speed, yaw velocit y and lateral
acceleration of the car. Using this
information, PSM is able to calculate the
actual direction of travel at any given
moment. If the car begins to oversteer or
understeer, PSM applies selective braking
on individual wheels in order to restore
stability. Under acceleration on wet or low-grip
road surfaces, PSM improves traction –
as well as agilit y and safet y – using the
automatic brake differential (ABD) and
anti-slip regulation (ASR). Integrated ABS
is designed to minimise braking distances.
If you prefer an ever sportier drive, PSM
can be switched off. For your safet y,

however, PSM remains set to intervene if
the vehicle is braked and ABS assistance
is required. ABS and ABD remain switched on at all times. Also included with PSM
are engine drag torque control (EDC),
precharging of the brake system and
brake assist. If you suddenly release the
accelerator pedal, PSM automatically
prepares for your next action: the braking
system is precharged so that the brake
pads are already in light contact with the
brake discs. Maximum braking power is therefore achieved much sooner. Brake
assist detects a panic braking situation
and generates the brake pressure
required for maximum deceleration.
For ward thrust
|
Chassis

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For ward thrust |
Chassis
Dynamic gearbox mounts.
Dynamic gearbox mounts are included
as part of the optional Sport Chrono
Package. They are designed to enhance
both performance and comfort.
The electronically controlled system
minimises the oscillations and vibrations of the entire drive train, especially the
engine.
The gearbox is bolted to the body by t wo
mounts. Like any mass, it obeys the law

of inertia. This means that it will continue
moving in a uniformly straight line unless
some force causes it to change direction. Put more simply: when you are driving
into a bend, the vehicle will follow your
steering but, at first, the mass of the
drive train will not. This means that the
rear of the vehicle will ultimately be
pushed out wards as a result of the drive
train’s force of inertia.
Dynamic gearbox mounts minimise this
effect. Steering angle and both longitudi
-
nal and lateral acceleration are constantly
recorded by sensors. The stiffness and
damping performance of the gearbox
mounts adapt to changes in driving st yle
and road surface conditions, which is
achieved by use of a fluid with magnetic properties. This results in greater

traction, perceptibly more stable handling
under load change conditions and in
fast corners and, in conjunction with the
‘Launch Control’ function for example,
extremely fast acceleration. Using the SPORT or SPORT PLUS but ton
you can switch the dynamic gearbox
mounts from ‘Normal’ to ‘Sport ’ or

‘Per formance’ mode and intensif y your
driving pleasure. In conjunction with optional PCM, the
G -Force graphic on the TFT screen in

the right-hand circular instrument enables
you to view the lateral and longitudinal
forces as they act on the vehicle.
1 Dynamic gearbox mounts

2
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The wider view |
Safety
Roll-over protection.
Dual roll - over protection creates survival
space in the event of a roll-over or side
impact. The front roll-over protection
element is made from super and ultra
high -strength steels. The rear roll - over
bars located behind the seats are a composite construction of aluminium and
steel. They are fully trimmed to blend in
and provide an excellent level of safet y.
The upper seat belt guides are mounted
on the roll-over bars for easier fastening.
Airbags.
To protect the driver and passenger, the
new Boxster models are equipped with
full-size airbags, which are inflated in

t wo stages depending on the severit y
and t ype of accident (e.g. frontal or offset
frontal). In less serious accidents, the airbags are only partially inflated, thereby
minimising discomfort to the occupants.
In addition to the central airbag control
unit on the transmission tunnel, a pair of
impact sensors is located near the head
-
lights. This allows a crash to be detected and evaluated far sooner and with

considerably greater accuracy.Porsche Side Impact Protection
System (POSIP).
Both new Boxster models are equipped
as standard with the Porsche Side Impact Protection System (POSIP). It comprises
t wo side airbags on each side. An integral
thorax airbag is located in the outer side
bolster of each seat, while the door panels
each contain an upwards-inflating head
airbag. Each thorax airbag has a volume of
10 litres and each head airbag 15 litres, ensuring excellent protection in the event
of a side impact even with the hood open.
POSIP additionally includes steel side
impact protection elements in the doors.
1 Engineered body design

2 Airbags and Porsche Side Impact Protection (POSIP)
Aluminium
Super high-strength steel
Multi-phase steel
Alloyed steel

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If we are to continue to enjoy driving
pleasure, we need to look after our
environment. In other words, we need to
take responsibilit y. In an era of intensify -
ing debate about global climate change
and CO
2 emissions, every automotive
manufacturer is asking itself what it
has to offer in terms of environmental
protection. Our answer has long been
the same: Intelligent Performance –
a combination of high power output and
high efficiency.
In recent years Porsche has managed to
reduce fuel consumption across all model
ranges by a double - digit percentage compared with the respective previous
model, even though performance has
been increased in every generation.

This is made possible by an efficient drive
concept (e.g. direct fuel injection (DFI) and
VarioCam Plus), lightweight construction,
optimised aerodynamics and low rolling
resistance.
The environmental management team
at the Porsche Development Centre in
Weissach aims to demonstrate a high
level of environmental responsibility. Here,
technological developments are carried
out with environmental protection in mind.
The goal is to enhance performance –
You can live for the moment
and still care about tomorrow.
Environment.
but, where possible, not at the expense
of the environment. We achieve this
goal with Intelligent Per formance, as
epitomised by the Boxster.
Exhaust emission control.
Vehicles manufactured by Porsche
demonstrate that even high-performance
sports cars can achieve moderate fuel
consumption and exhaust emission values
in their respective category.
This is achieved, on the one hand, through
the use of fuel - ef ficient technologies such
as auto start /stop, thermal management,
electrical system recuperation, direct fuel
For fuel consumption and CO
2 emissions please refer to page 127. injection, VarioCam Plus and, in conjunc
-
tion with optional PDK, coasting mode.
On the other hand, newly developed
cataly tic converters provide ef ficient
emission control. While the stereo
Lambda control circuitr y controls and
monitors each cylinder bank separately.
For each exhaust tract, oxygen sensors,
together with the engine electronics
and injectors, regulate the composition
of the exhaust gas, while another
Lambda sensor on each cylinder bank
monitors pollutant conversion in the
respective cataly tic converter.

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Exterior mirrors and rear-view mirror.
The new Boxster models are equipped
as standard with electrically adjustable
and heated exterior mirrors.
Available as an option, electrically folding
exterior mirrors with door courtesy light -
ing on both sides of the vehicle make it
easier to find your way in the dark.
An auto-dimming function for the exterior
mirrors and rear-view mirror with an
integrated rain sensor for the windscreen
wipers, is available as an option.
ParkAssist.
Optional ParkAssist is activated the
moment you select reverse gear.
An audible signal gives a warning if you
reverse too close to an obstacle.
An enhanced version of Park Assist also
provides monitoring of the area to the front of the vehicle. Ultrasonic sensors
are neatly integrated into the front and
rear aprons. The audible alert is supple
-
mented by a visual warning in the central
display of the CDR audio system or option -
al
PCM, which shows a graphical repre -
sentation of the vehicle from overhead.
HomeLink®
(programmable garage door opener).
The optional programmable garage door
opener is integrated into the overhead
console and remotely controls up to
three different garage doors, gates, home
lighting and/or alarm systems.

Anti-theft protection.
Both new Boxster models are equipped
as standard with an immobiliser with in-
key transponder and an alarm system

with contact-sensitive exterior protection.

Preparation Vehicle Tracking System
(PV TS).
This standard preparation enables future
installation of the Porsche Vehicle Tracking
System (PV TS) available from Porsche
Tequipment. The system makes it possible
to locate a stolen vehicle across most of
the countries of Europe. The preparation
package includes a special wiring loom
and a tilt sensor for the alarm system.
Two luggage compartments.
The t wo luggage compartments are
further proof that the Boxster harmoni -
ously combines the spirit of sport with
everyday practicality like never before.
The front and rear compartments have
a capacit y of 150 and 130 litres respec -
tively, regardless of whether the hood is
up or down. The interior surfaces are
carpet-lined and the lids are made from
aluminium. The two service openings in
the rear luggage compartment provide convenient access to the coolant and
engine oil filler caps.
The separate Porsche Design Driver’s
Selection catalogue contains a selection
of matching luggage accessories.
1– 3 Loading options with luggage items from

the Porsche Design Driver’s Selection
(items of luggage from the PTS AluFrame
and PTS Sof t Top series)