2010 PORSCHE 911 GTS charging

Intake manifold.
Take a deep breath. The
911 Carrera GTS models are
fit ted with a variable resonance
intake system featuring six
switchable, vacuum­controlled
valves. In the direct injection system,
the EMS SDI 3.1 engine manage
­
ment system adjusts the
injec ­
tion timing individually for
each
cylinder and the injection quanti ­
t y for each cylinder bank. This
optimises both the combustion
curve and fuel consumption.
A hot ­film air mass meter takes
care of the airflow, so that the
combustion chambers contain
exactly the right mixture at all
times.
Dual injection is implemented
at engine speeds of up to
3,200 rpm and triple injection
up to 2,500 rpm. The required
quantit y of fuel is distributed
to t wo or three successive
injection processes per cycle.
These valves enable the system
to switch bet ween power
­ and
torque ­optimised geometries
for all six air intake tracts to
produce even higher torque in
the mid ­rev range. The improved
charging of the combustion
chamber is made even more
This strateg y achieves faster
heating of the catalytic con­
verters af ter a cold start and
produces greater torque in the
upper load range.
DFI improves the internal cool
­
ing of the combustion chamber
by forming the mixture directly
in the cylinder. This has made it
possible to increase compres ­
sion (12.5:1), resulting in more
engine power and even greater
e f f ici e n cy.
Injection is regulated by the
electronic engine management
system. The exhaust gas
cleaning system ensures that
emissions remain below the
strict limits of the Euro 5 emis ­
sion standard, thus helping to
protect the environment.
ef ficient by a flow
­optimised
intake duct. The cooling system
has been adapted to the
increased engine output.
VarioCam Plus.
VarioCam Plus is a variable
valve timing system on the
inlet side which also features
t wo ­stage valve lif t. This allows
even smoother running with
comparatively efficient fuel
consumption and low emissions
– yet with greater power and
torque.
This t wo­in ­one engine concept
seamlessly adapts in response
to driver input. The result
is instant acceleration and
extremely smooth running
.
Direct fuel injection (DFI).
Ef ficiency is about get ting more
from less, and direct fuel injec ­
tion (DFI) is fit ted as standard.
With millisecond precision,
DFI injects fuel at up to 120 bar
directly into the combustion
chamber by means of electro ­
magnetically actuated injection
valves. The timing of each valve is step
­
lessly and electrohydraulically
controlled by means of a rotar y
vane adjuster.
For optimum responsiveness
during the warm ­up phase,
VarioCam Plus will select the
higher valve lif t set ting and
The spray and cone angles
have been optimised for torque,
power output, fuel consumption
and emissions, thus ensuring
homogeneous distribution of
the air/fuel mixture and, conse ­
quently, ef ficient combustion. retard valve timing. At medium
revs and low engine loads, the
lower valve lif t set ting is select
­
ed and timing advanced in order
to reduce fuel consumption
and emissions. The higher lif t
set ting produces high torque
and even more power output.
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Pitching of the body when pull­
ing away and braking is minimal,
as is body roll in corners. Tyre
noise and vibrations are simi­
larly reduced. Driving stabilit y,
on the other hand, is extremely
high.
This purposeful lightweight
construction keeps the vehicle
gross weight and the weight of
the unsprung masses low, while
the suspension itself allows
even high
­speed manoeuvres
to be executed smoothly and
s a fe l y.
Wheels.
As standard, the new
911 Carrera GTS models are
fit ted with 19 ­inch RS Spyder
wheels with centre spokes
with a black painted finish.
The main feature of these forged
aluminium alloy wheels is the
central locking device – a clear
reference to the world of
motorsport. Compared with the
conventional five ­bolt wheel

connection, it offers enhanced
driving dynamics and perform ­
ance thanks to the reduction in
rotating masses.
Tyre Pressure Monitoring,
available as an option, sends
warnings to the on ­board com ­
puter’s display screen in the
event of a gradual or sudden
loss of pressure.
Porsche Active Suspension
Management (PASM).
Included as standard equip ­
ment, Porsche Active Suspen ­
sion Management (PASM) is
an electronic active damping
system. It of fers continuous
adjustment of the damping
force on each wheel, based on
the current driving situation
and your driving st yle.
At the press of a button, the
driver can select bet ween t wo
different modes: ‘Normal’, which
is a blend of performance and
comfort, and ‘Sport ’, where
the setup is much firmer. The
balance bet ween comfortable
and uncompromisingly sporty is struck more ef fectively than
with a conventional chassis. The
PASM control unit evaluates the
driving conditions and modifies
the damping force on each of
the wheels optimally in accord
­
ance with the selected mode.
Sensors monitor the movement
of the vehicle body, for exam ­
ple, under heav y acceleration
and braking or on uneven roads.
The control unit tunes the damp ­
ers to the optimum hardness
for the selected mode to reduce
roll and pitch and to increase
contact bet ween each individual
wheel and the road.
PSM computes the actual
direction of motion. If this direc ­
tion deviates from the desired
course, PSM can, for example,
initiate braking interventions
targeted at individual wheels in
order to stabilise the vehicle.
Porsche Stability
Management (PSM).
PSM, which comes as standard,
is an automatic control system
that stabilises the vehicle at the
limits of dynamic driving per ­
formance. Sensors continuously
monitor driving direction, speed,
yaw velocit y and lateral acceler ­
ation. Using this information, Under acceleration on wet or
low
­grip road surfaces, PSM
improves traction using the ABD
(automatic brake dif ferential)
and ASR (anti ­slip regulation)
functions. For a pure, active
driving experience, PSM can
be deactivated but it will auto ­
19­inch RS Spyder wheel with central locking device
matically reactivate if necessar y
for safet y.
PSM comes with t wo additional
functions: precharging of the
brake system, enabling the
maximum braking power of the
911 Carrera GTS to be achieved much sooner; and brake assist,
for maximum deceleration in a
critical situation.
Those who speak in clear
language want clear distinctions.
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