2004-2011 Porsche 911 2 Door Chassis User Manual
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Chassis for Your Porsche 911 2 Door Sixth Generation (2004-2011)

· 64 ·
Porsche, Weissac h
Chassis
Ima ge 000005 
Chassis
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· 65 ·
Inner strength means
nothing if it’s kept hidden.
It has to be shown if it
is to achieve its full effect.
In the case of the 911, this
means that the power of the
engine has to be unleashed
onto the road. Effectively,
directly and dynamically.
For this reason, chassis
engineering is the
logical
continuation of
drive
engineering.
911 Carrera 
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· 66 ·
To steer a true course, you sometimes have to be able
to take the rough with the smooth.
The axles.
Standard suspension.
The front axle i s equipped with 
MacPherson strut  suspension, 
and wheel placement uses a 
high-precision arrangement of 
longitudinal and transverse links 
and reinf orced  w heel bearings. 
The benefi ts on the road are 
 precision wheel guidance, 
exc ellent straight-line sta bility and 
 superior handling characteristics.
The rear  axle has a race-derived 
multi-link suspension, following the 
LSA concept (Lightweight, Stable, 
Agile) for exceptional  driving 
dynamics. The axle  kinematics 
significantly redu ce the 
com pression of the vehicle’s 
su spension under acceleration. 
Lightwe ight spring struts with 
alum inum dampers on the 
rear axle help to maximize 
handli ng ag ility.
911 Carrera 4
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· 67 ·
The 911 | Chassis
This lightweight construction 
keeps the vehicle gross weight 
and the weight of the u nsprung 
mas ses low. The chas sis allows 
for safe maneuvering, even at high 
speeds. The  pitching of the body 
when pulling away and   braking is 
minimal, as is body roll in co rners. 
Rolling noises and vibrations 
are also kept to a minimum.
Steering.
The powe r steering  is sensitive 
and precise, providing e xce llent 
contact with the road and 
minimal
 
steering  effort by 
sports-car  standards. It offers 
steering   precision comparable 
with a 
 race car’s—eve n on 
tho se relaxing dri ves.
A special feature is the vari able-
steering ratio. Around the straight-
ahead positi on, such as d uring 
highway dr iving, the ratio is less 
direct. The risk of losing control  
of the wheel at high speed is 
 reduced, with no loss o f agility  
or feedback.
When the steering wheel is 
turned harder, the ratio  becomes 
more direct, allowing for 
easier corner
ing and parking. 
The car has a turnin g circle 
of just 35.8 feet (11 m).
911 Carrera S front axle
911 Carrera S rear axle
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· 68 ·
A turn for the better.
Porsche Stability Management (PSM).
PS M is an automatic control 
 system for providing stability  
at  t he limits of dynamic driving 
performance, and is a standard 
feature of every 911. Se nsors 
work continuously to monitor  
the driving direction, speed,  
yaw  velocity  and lateral 
acceleration 
of the car. Using 
this infor
mation, PSM comp utes 
the actual direction of motion.  
If this  direct ion deviates from 
the  desired  course, PSM ini tiates 
 braking interventions targeted  
at individual wheels—recognizable 
by the flashin g indicator 
light in the cockpit—in order 
to stab ilize the vehicle.
Unde r acceleration on wet or low-
grip road surfaces, PSM improves 
traction using  the ABD (Automatic 
Brake D ifferential) and ASR 
(Anti-Slip Regulation) functions. 
The  control interventions are 
smooth and precise, giving an 
agile  response. When  Sport 
mode is selected on the op tional 
Sport Chrono  Package Plus, 
911 Carrera S Cabriolet
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· 69 ·
The 911 | Chassis
Vehicle yaw/ 
 
course deviation
Vehicle yaw/ 
 
course deviation
Correction to 
vehicle course 
deviation an d 
stabiliz ation
Correction to 
vehicle course 
deviation an d 
stabiliz ation
Oversteer without PSM
Understeer without PSM Understeer with PSM
the PSM intervention  t hreshold is 
raised  to enable greater driver 
involvement—particularly at 
speeds of up to approximately  
45 mph. 
The integrated Anti-l ock Brake 
System (ABS) shortens the 
braking distance even further  
and the braking inputs are 
smooth and precise, t hereby 
enhancing  com fort.
An e nhanc ed PSM system is 
 characterized by two additional 
functions: the precharging of the 
brake system, and Brake Assist.
If the driver suddenly releases  
the acce lerator pedal, PSM 
 automatically readies the b raking 
system.  With the bra king  system 
having b een precharged, the 
brake pads are already in light 
contact with the brake discs. 
 Maximum braking power is 
therefore achieved much sooner.
When sudden braking is 
detected—i.e., if  t he pressure 
on t he brake pedal exceeds a 
predefined level—the Brake 
A ssist function uses the PSM 
hy draulics to apply  maximum 
brake pressure to all four wheels.
If you want a purely  active dr iving 
exp erience, you al wa ys have the 
option to de activate PSM. It is 
automatically reactivated, for  
your safety, if either of th e front 
wheels (in Sp ort mode, both of  
the fr ont wheels) requires 
ABS assistance. The ABD 
function, however, remains 
active at all times.
In conclusion, PSM offers a high 
leve l of driving stability and  
safe ty—and typical Porsche 
 agility at  the same time.
Oversteer with PSM
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· 70 ·
Two different modes.
One driving feel: 911.
Porsche Active Suspension Management (PASM).
The electronic adjustment of  
the suspension s ystem active ly 
and contin uously regulates the 
damping force for each wheel 
according to the road conditi ons 
and driving style. In ad diti on, 
the suspension is 0.39 of an inch 
(10 mm) lower. PASM is fitted 
as standard in the 
S mode ls 
a nd  is optional for  
models 
with the 3.6-liter engine.
At the push of a bu tton, the driver 
can select between two different 
modes: “Normal,” which is  a blend 
of performance and comfort,  
and “Sport,” where the setup 
is much firmer. T he two setup 
modes overl ap slightly and so  
the balan ce between comfortable 
and uncompromisingl y spo rty 
is struck more effectively than 
with a conventio nal chassis. 
Depending on the mode selected, 
therefore, PASM is sportier 
or more comfortable th an the 
standard chassis of models with 
the 3.6-liter engine. The PASM 
cont rol unit evaluates the driving 
conditions a nd modifies the 
damping force on each   
of the wheels in accordance 
with the selected mode.
Sensors monitor the movement  
of the vehicle body, for example, 
under heavy acceleration and 
braking or  on uneven roads. The 
cont rol unit tunes the dampers  
to the optimal hardness fo r the 
selected mode t o reduce roll  
and pitch, and in creas e contact 
between each individual wheel  
and the road.
In Sport mode, the suspension is 
set to a harder damper rating. On 
une ve n ro ads, PAS M immediately 
switches to a softer rating within 
the Sport setup range, thereby 
improving contact between 
the wheels and the road. When 
the road surface imp roves, 
PASM   automatically reverts to 
the  original, harder ra ting.
If Normal mode is selected an d 
the driver’s style becomes more 
ass ertive, PASM automatica lly 
s witches to a harder rating 
within th e Normal setup ra nge. 
Damping  becomes harder, 
and driving stability and road 
safety a re increased.
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· 71 ·
The 911 | Chassis
PASM sport chassis with
mechanically locking rear
differential.
The PASM sport chassi s is 
 available as an option for Coupe 
models and only in conjunction 
with 19-inch wheels.
The body is 0.79 of an inch (20 
mm) lower than the standard 
susp ension of the 
3.6-l iter engine 
m odels, and 0.39 of  an inch (10 
mm) lower than the PASM 
 suspension of the S models. The 
springs are harder and shorter, 
and the lateral stabilizers on the 
front  and rear axles are stiffer. In 
com binati on with PASM, it offers 
greater comfort than that of a 
conventional spo rt susp en sion.
The mechanically l ocking rear 
differential further enhances 
the traction  of the drive n rear 
wheels on uneven roads and, 
for example, when accelerating 
out of tight curves. Roadholding 
at  t he limits 
of performance 
is eve n more  predictable. The 
car holds its course better and 
so PSM intervenes less often.
Left:    Rebound in Normal mode— 
working piston and bypass, 
spo rty-comfortable tuning
Right:   Rebound in Sport mode— 
working piston only, sporty-
  hard tu ning
Left:    Compression in Normal mode— 
working piston and bypass, 
spo rty-comfortable tuning
Right:   Compression in Sport mode— 
working piston only, sporty-
  hard tu ning
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· 72 ·
911 Targa 4S
Euphoria.
At the push of a button.
Sport Chrono Package Plus.
All 911 models can also be  fitted 
with the op tional Sport Chrono 
Package Plus. I t offers even 
 sportier tuning of  the engine  
and chas sis, and delivers 
ev en greater  driving 
pleasure as a  result.
Inclu ded in the package are a 
 digital and analog timer, the 
Sport  b utton, a perfor mance 
 display and a personal 
 memory function  in Porsche 
Communi
cation Management 
(PCM). Also included—when 
f itted in  combination with Porsche 
 Dopp elkupplung (PDK)—is the 
Sport Plus button, as  well  
as an additi onal display on the 
steering wheel, which indicates 
when the Sport button or Launch 
Control has been enabled.
When the Sport button on the 
center console is selected, the 
EMS SDI 3.1 engine management 
system enhances the engine 
 response . A modified throttle 
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· 73 ·
The 911 | Chassis
Ste ering-wheel  display in combination with PDK and Sport Chrono Package Plus
map relates t he pedal angle in the 
footwell to a much wi der angle  
of opening on the throttle valve. 
Throttle response is significantly 
more immediate, and in the   
higher gears, a hard rev 
limiter helps protect t he 
engine under acceleration.
The optional Porsche Active 
 Suspension Management 
(PASM) also switches to Sport 
mode for harder d amping and 
more direct steering, and, 
therefore, better roadholding.
A hard rev limiter is also  applied  
in t he automatic mode of the 
 optional PDK , while gearshift 
points are delaye d until the upper 
rev range. The shift times are 
shorter, the gear changes sportier. 
At low rates of deceleration— 
eve n with high engine speeds— 
th e system initiates a swifter 
brake-induce d downshift. In 
 ma nual mode, gear changes  
are faster and more dynamic.
In Sport mode, the trigger 
 threshold for PSM is raised  
for increased longitud inal and 
 lateral dynamics. Agility is 
 enhanced u nder  braking for 
 corners with PSM, enabling  
greater m aneuverability under 
braking  and exit accelerati on, 
 especially at low speeds.
For maximum dexterity, PSM can 
be  set to  standby while the car is 
still in Sport mode. For safety, it 
is set  to intervene automatically 
only when ABS assistance is 
 required on both front wheels.
In com binati on with PDK, the 
Sport Chrono  Package Plus has 
two additional functions that  
are activated b y pressing the 
Sport  Plus butt on, to take 
 driving  to an even sportier level.
Launch Control is used, for 
 example, on the track to 
achieve the best standing start 
possible—a racing start.
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· 74 ·
Launch Control is operated via the 
Sport Plus button with the “D” or 
“ M” drive position selected. While 
the driver depresses the brake 
pedal with the left foot, the right 
foot  depresses the accelerat or 
pedal to the floor. With the 
accelerator in the  kickdown 
position, the system detects the 
driver’s request for Launch mode 
and revs the engine to an optimal 
speed 
of approximately 6500 
rpm.  Engine torque increases 
a nd  the clutch closes slightly. The 
message “Launch Control” appears 
in the PDK display on the steering 
wheel. 
The driver n ow quickly 
 releases the brake—and prepares 
for maximu m acceleration.
The second functio n is the 
motorsport-derived gearshift 
strategy. Using this, Porsche 
Doppel kupplung (PDK) is geared 
up  for extremely short s hift times  
and optimal shift points for 
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· 75 ·
The 911 | Chassis
 maximu m acceleration—ideal  
for the racetrack.
A key component of Sport  
Chrono Package Plus is the 
time r mounted on the dashboard.  
Porsche Communication 
 Manageme nt (PCM) has a special 
performance di splay for viewing, 
storing and evaluating lap times or 
other driving times. It shows the 
total driving time, lap distance, 
lap number and the lap times 
 recorded so far. You can view  
th e current fastest lap  and 
th e remaining range until 
empty. 
 Traveled distances 
can be recorded and 
benchmark times defined.
The persona l memory function 
of the Sport Chr ono Package 
Plus can also be used to 
store personalized  settings 
for a range of  systems, 
including the orientation 
lighting or ai r con diti oning.
911 Targa 4
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· 76 ·
911 Ca rrera 4 with 18-inch Carrera IV wheels
Even standing still, their effect is powerful.
Wheels.
The 911 Carrera models and 
the 911 Targa 4 are fitted with 
18-inch Carrera IV wheels as 
standard. These wheels feat ure 
a classic sporty design.
The S  models are equipped 
with 19-inch C arrera S II 
wheels as standard. The visual 
effect? Sporty and dynamic.
Both sets of wheels are desig ned 
to displa y the four-piston, 
alum inum monobloc calipers  
and promote efficient ventilation 
of the brake  system.
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· 77 ·
The 911 | Chassis
911 Ca rrera S with 19-in ch Carre ra S  II  wheels
18-inch Carrera IV wheel
19-inch Carrera S II wheel
Tire Pressure Monitoring
System (TPMS).
The optional Tire Pres sure 
 Monitoring System (TPMS) 
sends warnings to the onboard 
com puter’s display screen in the  
ev ent of low tire pressure, as well 
as in the  event of creepi ng  
or sudden los s of pressu re.
The driver can check the 
pressure in all four tires from the 
inst ru
m ent cluster. Each time the 
tires are reinflated , or whenever 
a wheel has been changed, 
the updated tire pressures are 
displayed with minimum delay—
for increased comfort and safety.
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