2010 PORSCHE BOXSTER S ignition

· 30 ·· 31 ·
1
2
3
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56
78
9
1011
12
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20
Boxster | Drive
3.4-litre six-cylinder Boxer engine in the Boxster S
1. High pressure pump
2. High pressure injector
3. Ignition rod module
4. Camshaft controller
5. Tappets with integral valve
play compensation
6. Inlet camshaft
7. Inlet valve
8. Valve spring
9. Combustion chamber with
Alusil running surface 1 0 .
Forged aluminium pistons
11. Forged connecting rod
12. Crankshaft
13. Water pump

14. Vibration damper
15. Resonance valve
16.
Twin flow valve

17.
Intake distributor with
integral acoustic volume

18. Vacuum pump
19. Cooling jacket
20. Crankshaft breather
21. Timing chain
200
180
280 300
320
340
360 380 400
420 40
20
60 80
100 120 140 160 180 200 220 240
260
1500
7500
2000 25003000 3500400045005000 5500600065007000 220 240 260 1000
360 Nm
280
440

Power (kW)
Engine speed (rpm)
Torque (Nm)
228 kW (310 hp)
200
180
280 300
320 340 360 380 400 420
220 240
260
44040
20
60 80
100 120 140 160 180 200 220 240 260
1500
7500
2000 25003000 3500400045005000 55006000650070001000
290 Nm
280

Power (kW)
Engine speed (rpm)
Torque (Nm)
188 kW (255 hp)
Boxster: 290 Nm between 4,400 and 6,000 rpm, 188 kW (255 hp) at 6,400 rpm
Boxster S: 360 Nm between 4,400 and 5,500 rpm, 228 kW (310 hp) at 6,400 rpm

· 34 ·· 35 ·
Boxster
Boxster
Boxster
Engine management system
with electronic throttle.
The electronic engine manage -
ment system ensures optimum
engine performance under all
operating conditions. It regulates
all engine-related functions and
assemblies (see diagram). The
results: optimum performance
and torque with reduced fuel con -
sumption and emissions.
Another important function of the
system is cylinder-specific knock
control. Since the six cylinders
never all work under precisely
the same conditions, they are
monitored individually by the
knock control. If necessary, the
ignition point is shifted individu -
ally to protect the cylinders and
pistons at high engine speeds
and loads. The on-board diagnos -
tics, which are compliant with
European standards, ensure
timely detection of any faults and
defects that may occur in the
exhaust and fuel system in good
time and notify the driver
immediately. This also prevents
increased pollutant emissions
and
unnecessary fuel consumption.
Two-stage resonance intake
manifold.
The intake manifold with dual-flow
distributor pipe has an adjustment
valve which closes and opens at
set engine speeds. A t wo -stage
tuning effect creates oscillation
of the air mass in the intake

system, which in turn generates
a turbocharging effect and opti -
mises induction.
These t wo effects combine to
produce higher torque at low
engine speeds, a flat ter torque
curve, and increased power
output at high engine speeds.
The acoustic properties of the
system are second to none,
producing the characteristic
Boxster sound.
Boxster | Drive
Input data Used to regulate/control
Engine management system
ME 7.8/Boxster – SDI 3.1/Boxster S
Engine load
Lambda sensor signals
Engine speed (from crankshaft)
Inlet camshaft phase angle
Knock sensor signals
Vehicle speed
Pressures
– Engine oil
– Fuel
– Ambient air
Air-conditioning settings
Accelerator pedal
Temperatures
– Coolant
– Intake air
– Air in engine compartment
– Engine oil
– Ambient air
Ignition
Heating of lambda sensors
Fuel pump (Boxster)/fuel pumps
controlled on - demand (Boxster S)
Camshaft position
Fuel-tank venting
Engine fan
Starter
Continuously variable oil pump
Fuel pressure (Boxster S)
Throttle valve
Throt tle -valve angle
Idling via throttle valve
and ignition
Manifold injection (Boxster)/
direct fuel injection (Boxster S)
Valve lift switchover
(VarioCam Plus)
Secondary-air injection (Boxster)
CAN inter face with driving dynamics control, transmission control, immobiliser, instrument cluster, climate control,
SPORT button, SPORT PLUS button, sports exhaust system button, diagnostics, etc.

· 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

· 74 ·· 75 ·
Standard seats.
The standard seats with centre
upholstered in Alcantara of fer
a high degree of comfort with
good lateral support and opti-
mised under-seat suspension.
Through bends, your seat gives
you a feeling of securit y with-
out restriction. The seats are
equipped as standard with

manual height and fore/aft adjust -
ment and an electric backrest
adjustment, enabling virtually
every driver to find the ideal seat
position, regardless of physical
build.
Comfort seats with driver
memory.
Comfort seats with electric fore/
aft, height, backrest and lumbar
support adjustment are available
as an option. The tilt angle of the
seat squab is also electrically
adjustable. The memory function
supports the exterior mirrors
and all seat positions on the
driver’s side. Using the control
switches in the door panel, it
is possible to restore one of t wo
personalised set tings. Addition -
ally, you can store a further seat
position in each of the ignition
keys. As soon as you unlock the
door using the key remote, the
driver’s seat and exterior mirrors
resume their stored position.
Sports seats.
The optional sports seats have
firmer leather upholstery than
the standard design. Higher side
bolsters on the seat squab and
backrest provide additional lateral
support. The seat height and
fore/aft position are adjusted
manually, the backrest electrically.
Adaptive sports seats with
driver memory.
The optional adaptive sports
seats in leather upholstery

combine excellent comfort with
first-rate track performance.
Boxster | Comfort
Along with all the adjustment
features of the comfort seats,
the side bolsters on the seat
surface and backrest are indi -
vidually electrically adjustable,
for increased comfort on long
journeys and tailor-made lateral
support through bends or on

the racetrack. The memory func -
tion supports the exterior mirrors
and all driver’s seat positions,
apart from the side bolsters.
Sports bucket seats.*
For the ultimate sports experience,
you could opt for sports bucket
seats with a folding backrest,
integral thorax airbag and manual
fore/af t adjustment. The backrest
shell is made from glass/carbon-
fibre-reinforced plastic and has
a st ylish carbon -weave finish. The
backrest pivots are positioned
high in the side bolsters to provide
lateral support to the pelvic region
characteristic of a race seat. The seat upholstery is of fered

in all available leather t ypes and
colours.
Seat heating and ventilation.
As an option, all compatible
seats – apart from sports bucket
seats – can be equipped with
t wo -level seat heating. Seat venti-
lation for the standard seats and
comfort seats is also available
as an option (only in conjunction
with heated seats, automatic
climate control, and part- or full-
leather interior). A slipstream
effect evaporates perspiration
moisture – for a comfortable
seating environment. Ventilation
intensit y can be set to any of
three levels.
Materials.
As well as the leather steering
wheel rim, gear/selector lever,
handbrake lever and door handle,
the Boxster S has leather trim
on the lids of the storage com -
partments in the door and the
centre rear console. Leather
upholstery is available as an
optional extra. On request, further
trim elements can also be leather-
finished or individualised with
wood, carbon or Aluminium Look
finish. (For further information
please see pages 112 to 116 and
the Porsche Exclusive Boxster
catalogue with current price list.)
Comfort seat with driver memory Adaptive sports seat with driver memory Sports bucket seat *
Child restraint systems must not be used
in conjunction with spor ts bucket seats.

· 128 ·· 129 ·
Te r m Pa g e
A
Active safet y 60
Adaptive sports seats 74
Airbags 66, 67
Anti-theft protection 78
Audio interface, universal 86
Audio system CDR-30 82
B
Bi-Xenon headlights 65
BOSE
® Surround
Sound System 88
Boxer engine 26
Braking system 61
C
CD or CD/ DVD autochanger 87
Chassis 48
Child seats 67
Climate control 76
Colours 100
Comfort seats 74
Cruise control 76
Cylinder-specific
knock control 35
D
Direct fuel injection (DFI) 28
Dry-sump lubrication,
integrated 32
Dynamic cornering lights 65
E
Electronic logbook 85
Engine cooling 33
Engine management system
with electronic throt tle 35
Environment 90
Exclusive, Porsche 119
Exhaust emission control 93
Exhaust system 38
F
Factory collection 120
Fuel 94
H
H a rd t o p 81
Headlight cleaning system 65Heated seats
75
Heated steering wheel 73
Hill -start assist 47
HomeLink
®
Garage door opener 77
Hood 80
I
Ignition system 37
Individual equipment 98
Instruments 72
L
LED day time running lights 65
Lighting concept 64
Lightweight construction 32
Luggage compartment 79
M
Maintenance 95
Manual gearbox 47
Materials 75
N
Navigation module 84
Noise 95
O
Oil supply 32
On-board computer,
integrated 72
P
Pa rk A ssist 78
Passive safet y 66
Porsche Active Suspension
Management (PASM) 54
Porsche Ceramic Composite
Brake (PCCB) 61, 62
Porsche Communication
Management (PCM) 83
Porsche Doppelkupplung
(PDK) 42
Porsche Exclusive 119
Porsche Side Impact
Protection (POSIP) 67
Porsche Stabilit y
Management (PSM) 63, 64
R
Rear differential,
mechanically locking 54
Recycling 93
Resonance intake manifold 35
Roll-over protection 67
S
Seat ventilation 75
Service 95, 122
Servicing 39
Side windows, water- repellent 78
Six-cylinder Boxer engine 26
Sound Package Plus 87
Sport Chrono Package 56
Sport Chrono Package Plus 57
SportDesign Package 106
Sports bucket seats 75
Sports exhaust system 38
Sports seats 74
Standard seats 74
S te e r i n g 51
Steering wheels 46, 73
Storage compartments 76
T
Technical data 126
Telephone module 85
Telephone preparation 86
T V tuner 85
Tyre Pressure Monitoring
( TPM) 52

V
VarioCam Plus 36
Vehicle tracking system 79
Voice control system 85
W
‘Welcome Home’ lighting 77
W heels 52
Wind deflector 81
Wiper system 77
Index