2013 PORSCHE BOXSTER S engine

3233For fuel consumption, CO2 emissions and efficiency class please refer to page 131.
converter to reach normal operating
temperature 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.
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 cataly tic
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.

3435For fuel consumption, CO2 emissions and efficiency class please refer to page 131.
Fo r w ar d t h r u s t |
Engine
To reduce power losses and increase
ef ficiency, an electronically controlled oil
pump supplies the lubricating points
inside the engine as and when required.
This results in optimum supply of oil,
lower fuel consumption and reduced
em issio ns.
The oil tank is located in the engine,
thereby eliminating the need for an exter
-
nal oil tank which saves both space
and weight.Integrated dry-sump lubrication.
Integrated dr y-sump lubrication ensures
a reliable supply of oil even when a sport y
driving st yle is adopted and the vehicle is
experiencing powerful lateral acceleration.
It also has additional cooling functions.
This results in instant acceleration and
extremely smooth running.
In short, VarioCam Plus provides
extraordinary power with comparatively
low fuel consumption.
The system first dif ferentiates bet ween
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. VarioCam Plus.
VarioCam Plus is a two-in-one engine
concept for adjusting the intake
camshafts and switching the lift of
the intake valves.

2
1
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37Fo r w ar d t h r u s t |
Engine
For fuel consumption, CO2 emissions and efficiency class please refer to page 131.
1 Boxster tailpipe
2 Boxster S t win tailpipemonitors 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 Boxster
models is the sports exhaust system
including sports tailpipe. It produces an
even more resonant Porsche sound.
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 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
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.

1
3839For fuel consumption, CO2 emissions and efficiency class please refer to page 131.
Fo r w ar d t h r u s t |
Engine
immediate, while throttle-blip downshifts
are accompanied by an emotive engine
sound. Coasting mode (p. 46) is deacti -
vated automatically.
tuned for performance driving. The auto
start/stop function is also deactivated.
With the optional
Porsche Doppelkupplung
(PDK) transmission, the shift points
are reconfigured to operate at higher
engine speeds. Shift times are reduced
and gearshifts become firmer and more
SPORT button.
The SPORT but ton on the centre console
is fit ted as standard. When selected,
‘Sport’
mode is activated to provide
greater response and enhanced driving
pleasure. Throttle response becomes even
more direct, the rev-limiter is adjusted to
a harder set ting and engine dynamics are
loads. For compliance with EU Standards,
the on - board diagnostics detect any
faults and defects that may occur in the
exhaust and fuel systems and then
notify the driver immediately. This also
prevents increased pollutant emissions
and unnecessary fuel consumption.
Another function 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. The igni
-
tion point is shifted individually, as and
when necessary, to protect the cylinders
and pistons at high engine speeds and
Engine management.
The electronic engine management
system ensures optimum engine perfor -
mance at all times. It regulates all
engine-related functions and assemblies.
The results are optimum power output
and torque with comparatively low fuel
consumption and emissions.
1 SPORT button

2 1
4041For fuel consumption, CO2 emissions and efficiency class please refer to page 131.
Fo r w ar d t h r u s t |
Engine
adaptive cruise control will decelerate
your vehicle accordingly – even down to
a halt.
1 Auto start /stop but ton
2 Adaptive cruise control radar sensor
front because it is driving more slowly –
this is detected by the radar sensor. The
system now reduces the speed of your
vehicle by restricting throt tle or by gently
applying the brakes until your chosen
distance from the vehicle in front is main -
tained. If the vehicle ahead slows further,
regulates the speed of your vehicle in line
with the speed of the vehicle in front. A

radar sensor scans the road ahead up to
a distance of 200 m.
Imagine you’ve selected a cruising speed
but have begun to gain on the vehicle in
within the speed limit, it also helps you to
save fuel by maintain
ing a constant speed.
Adaptive cruise control including
Porsche Active Safe (PAS).
Also available as an option is the
enhanced version of cruise control, which
Cruise control.
This optional automatic speed controller
for the 30 to 240 km/ h speed range is
operated using a switch
on a separate
control stalk on the steering
column. The
advantages are clear, not
only can cruise
control be used as a
means of staying
The auto start /stop function can be
deactivated and reactivated using a sepa-
rate but ton on the centre console. The
function may be deactivated automatical-
ly under particular circumstances, for
example in extreme outside tempera
-
tures, when the SPORT but ton is selected
or when there is low bat tery charge.
All audio and commu nication systems
remain switched on. The engine will
restart as soon as you operate the clutch
or, in cars with PDK, release the brake.
This fuel-saving innovation is designed
primarily for use in towns or congested
motorway traffic.
Auto start/stop function.
The auto start/stop function, which is
integrated as standard in the Boxster
models, switches off the engine when
you stop, select neutral and release the
clutch pedal.
In cars with Porsche
Doppelkupplung (PDK), it is simply a
case of applying and holding the brake.

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43Fo r w ar d t h r u s t |
Engine
For fuel consumption, CO2 emissions and efficiency class please refer to page 131.
Servicing.
In the Boxster 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 normal servicing. In
short, longer service intervals mean long er-
lasting driving pleasure.
initiation of targeted braking. During this

process, any braking by the driver is
boosted to achieve the maximum braking
force that the system is able to provide.
Electrical system recuperation.
For enhanced ef ficiency the Boxster
models are equipped with intelligent elec -
trical system recuperation. The vehicle
bat tery is recharged by the generator
predominantly under braking. Thanks to
this selective recharging, when you
request full driving power the maximum
possible output can be directed straight to
the road.
For increased safet y, the system also
readies the brakes whenever it detects
that the distance from the vehicle is

decreasing. However, the driver should
be prepared to intervene manually if
heavier braking is required. As soon as
the road ahead clears, your vehicle will
accelerate back up to the cruising speed
originally set.
Porsche Active Safe (PAS) issues an audi -
ble and a visual warning if the system
detects that your vehicle is approaching
the vehicle in front too quickly. This is
accompanied by a brief application of
brake force and, where necessary, the

7654321R
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4445
1 Gear lever for six-speed manual gearbox
2 PDK gear selector
3 PDK gearshift switches on multifunction
steering wheel
4 Porsche Doppelkupplung (PDK) H a l f ge a r b ox 1: ge a rs 1, 3, 5, 7, R
Half gearbox 2: gears 2, 4, 6The 7th gear ratio is longer and keeps
engine speed low to improve ride comfort
and
reduce fuel consumption at higher
speeds.
The design of PDK is similar to t wo
conventional gearboxes in one. The odd
numbered gears are housed on one
assembly and the even numbered gears on
another, each having its own clutch. While
one gear is engaged, PDK pre-selects the
next gear based on driver input. When the
next gear is requested, drive is switched
from one clutch to the other in millisec-
onds, delivering gear changes with no loss
of drive.
With the SPORT but ton selected, the full
advantages of PDK are brought into play:
Act or relax as you please.
Transmission.
Package, the SPORT PLUS but ton acti-
vates the throt tle-blip function to make
the gearshift process an even more
engaging experience.
Porsche Doppelkupplung (PDK).
Available as an option for the Boxster
models is 7-speed Porsche Doppelkupplung
(PDK), featuring both manual and automatic
modes. PDK offers extremely fast gear
changes with no interruption in the flow of
power, improved acceleration over the man-
ual gearbox, very short response times,
reduced fuel consumption and a distinct
increase in comfort.
In total, PDK has seven forward gears at
its disposal. Gears 1 to 6 have a sports
ratio and top speed is reached in 6th gear.
For fuel consumption, CO2 emissions and efficiency class please refer to page 131.
Six-speed manual gearbox.
Both Boxster models are equipped as
standard with a light weight six-speed
manual gearbox. Gearshifts are smooth
and optimally adapted to the respective
engine map. Shift throws are short and
sport y and the gear lever is easy to oper-
ate, enabling a rapid gearshift action and
providing a truly engaging driving experi-
ence. The upshift indicator located in the
central circular instrument helps you to
maximise fuel efficiency.
The ascending centre console gives you
an authentic sports car feel. It positions
the gear lever close to the steering wheel,
which enables you to change gear as fast
and as ergonomically as possible. In con-
junction with the optional Sport Chrono

4647
Fo r w ar d t h r u s t |
Transmission
accelerator or brake pedal, PDK re-en -
gages the appropriate gear within frac -
tions of a second. The process is smooth
and seamless thanks to the extremely
fast clutch.
Another way to reduce fuel consumption
is to utilise the coasting function on
downhill gradients that are gentle enough
for you to maintain a constant speed.
Efficient on long journeys, such as on the
motorway, PDK remains ready to respond
as swiftly and precisely as you would
expect.
In short, driving in coasting mode makes
a real impact on fuel consumption with -
out any need for compromise on comfort
or sporty performance.Coasting.
The coasting function available with
Porsche Doppelkupplung (PDK) enables
you to save even more fuel where the
situation allows. The engine is decoupled
from the transmission to prevent
deceleration caused by engine braking.

In this way, optimum use is made of
the vehicle’s momentum, allowing it to
coast for longer distances.
For example, you may want to slow
down 100 km/ h to 80 km/ h in anticipa -
tion of the change of speed limit ahead.
As you ease off the accelerator pedal,
PDK deselects the current gear automa -
tically and you begin
to coast in neutral
until you have reached
your desired
speed. As soon as you
operate the
For fuel consumption, CO2 emissions and efficiency class please refer to page 131.
a more immediate response to throt tle
inputs, even shorter shift times and swift,
throttle-blip downshifts on overrun and
when braking – always accompanied by
an emotive engine sound.
With the optional Sport Chrono Package,
PDK is enhanced by the ‘Launch Control’
and ‘motorsport- derived gearshif t strat-
egy’ functions (p. 65) for even faster and

firmer gear changes and the best possible
performance thanks to a boost in torque
during upshift phases. Overrun downshifts
provide extremely sport y braking and
acceleration for added excitement.