technical data PORSCHE 911 GT3 2004 5.G Owners Manual

TIre Pressures forCold TIres

Summer tiresandsnow tires

Front
Rear
32
psi (2.2 bar)overpressure
39 psi (2.7 bar)overpressure

These tirepressures arevalid onlyforPorsche approved tires.
For replacement tiresitis imperative thatyouconsult theTechnical DataandTires, Wheels
sections ofthis manual andfollow therecommendations containedtherein.

5

Controls,Instruments
Maintenance, CarCare
Practical Tips,Emergency Service
Vehicle Identification, TechnicalData
Index
13
-110
112 -138
140 -178
180 -189
190 -194

11

Temperature A,8,C

The temperature gradesareA(the highest), Band
C, representing thetire's resistance tothe gener-
ation ofheat anditsability todissipate heatwhen
tested undercontrolled conditions onaspecified
indoor laboratory testwheel.
Sustained hightemperatures cancause themate-
rial ofthe tire todegenerate andreduce tirelife,
and excessive temperature canlead tosudden
tire failure.
The grade Ccorresponds toalevel ofperfor-
mance whichallpassenger cartires must meet
under theFederal MotorVehicle SafetyStandard

No. 109.

Grades Band Arepresent higherlevelsofperfor-
mance onthe laboratory testwheel thanthemini-
mum required bylaw.

A
Warning!

The temperature gradeforthis tireisestablished
for atire that isproperly inflatedandnotoverload-

ed.

Excessive speed,underinflation, orexcessive
loading, eitherseparately orincombination, can
cause heatbuildup andpossible tirefailure.
Tire
pressures

A
Warning!
Incorrect tirepressure causesincreased tire
wear andadversely affectsroadhandling.

I>
Always useanaccurate tirepressure gauge
when checking inflationpressures.

I>
Donot exceed themaximum tirepressure list-
ed onthe tire sidewall.
Please observe thechapter "VEHICLE IDENTI-
FICATION, TECHNICAL DATA"onPage 179.

I>
Cold tireinflation pressure means:alltires
must becold, ambient temperature maximum
68°F (20°C), whenadjusting theinflation pres-
sure.
Avoid sunlight strikingthetires before measur-
ing cold pressures, sincethepressures would
rise from temperature influence.

I>
Valve capsprotect thevalve fromdustand
dirt, andthus from leakage.
Always screwcapstightly down.
Replace missingcapsimmediately.

I>
Donot use commercially availablesealantor
tire inflating bottles.
Tire
traction

A
Warning!
When driving onwet orslushy roads,a
wedge ofwater maybuild upbetween the
tires andtheroad. Thisphenomenon is
known as"hydroplane" andmay cause par-
tial orcomplete lossoftraction, vehicle
control orstopping ability.
I>
Reduce speedonwet surface toprevent this.

Tire life

Tire lifedepends onvarious factors, i.e., road
surfaces, trafficandweather conditions, driving
habits, typeoftires andtirecare.

I>
Inspect yourtires forwear anddamage before
driving off.Ifyou notice uneven orsubstantial
wear, wheels mightneedalignment ortires
should bebalanced orreplaced.
Practical Tips,Emergency Service

Beforemounting snowtires, consult with
your Porsche dealer.Hehas thetechnical
information necessarytoadvise youon
wheel andtirecompatibility.

Snow tiresshould havethesame loadcapacity as
original equipment tiresandshould bemounted
on allfour wheels.
Snow tireswithstuds should berun atmoderate
speeds whennewinorder togive thestuds time
to settle.

/i\
Warning!
Tires withbadly worntreads andstuds are
very dangerous andcould cause accidents
resulting insevere personal injuries.

I>
Make surethey arereplaced immediately.
Do not drive avehicle equipped withsnow tiresat
prolonged highspeed.
Snow tiresdonot have thesame degree oftrac-
tion ondry, wet orsnowfree roadsasanormal
tire. Furthermore, snowtireswear rapidly underthese
conditions.
Snow tiresdonot fulfill their purpose ifthe tread
depth isless than 5/32 in.(4mm).

Comply withallstate andlocal laws
governing snowtireand tread depth
requirements.
Snow
chains

/i\
Caution!
Risk ofdamage tobody, axleorbrake com-
ponents.

I>
Fitsnow chains onlytothe rear wheels, and
only withthetire/rim combination listedinthe
Technical Data.
To ensure adequate clearance betweenchain
and body, Porsche recommends onlytheuse
of fine-link chainssuchasthose approved by
Porsche.

I>
Follow instructions issuedbythe supplier of
the chains.
Different statesandcountries havevarying statu-
tory requirements regardingmaximum speed.
Check withlocal authorities forpossible restric-
tions.

I>
Remove chainsassoon asthe roads arefree
of ice and snow.
Tire
designations

Due tonew speed andload ratings forradial tires,
new designations havecome intoforce forsnow
tires foryour Porsche.
The designation tobe used forZRtires ise.g.,
255/40 ZR17(Z
=
code letterforradial tiresfor
speeds above150mph (240 kmjhl.
Practical Tips,Emergency Service

VehicleIdentification, TechnicalData

Vehicle Identification, TechnicalData

Vehicle Identification

When ordering sparepartsormaking
inquiries. pleasealwaysquotethevehicle
identification number.

Vehicle identification label

Vehicle identification labelisattached tothe inner
side ofthe luggage compartment hoodbelow the
hood lock.Itcontains allimportant dataabout
your car.
Vehicle Identification, TechnicalData This
label contains thefollowing information:
1. Vehicle Identification No.
2. TypejType description
3. Engine codejTransmission code
4. Paint No.jlnterior
5. Optional equipment
A duplicate ofthis label isinyour Maintenance
Booklet.

Note

This data bank cannot bere-ordered ifit is lost or
damaged.

Vehicleidentification number

In accordance withFederal SafetyRegulations,
the vehicle identification numberofyour carislo-
cated atthe bottom leftofthe windshield frame
and canbeseen from theoutside.
The vehicle identification numberisalso inthe lug-
gage compartment onthe right nexttothe battery

(arrow).

Safetycompliance sticker

The safety compliance stickerisyour assurance
that your newPorsche complies withallapplicable
Federal MotorVehicle SafetyStandards which
were ineffect atthe time thevehicle wasmanufac-
tured.
The sticker alsoshows themonth andyear ofpro-
duction andthevehicle identification numberof
your car(perforations) aswell asthe Gross Vehi-
cle Weight RatingandtheGross AxleWeight
Rat-

Ing.
Paint
data

The paint dataplate isattached tothe leftside wall
under thecarpet inthe luggage compartment.
Engine
number

The engine number isstamped onthe underside
of the crankcase.
Vehicle Identification, TechnicalData

Technical Data

Engine data

Type

Number ofcylinders
Bore
Stroke
Cubic capacity
Compression ratio
Net-horsepower, SAE
J
1349
at crankshaft speed
Net torque, SAE
J
1349
at crankshaft speed
Alternator Engine control

Driving Performance*

Maximum speed
Acceleration 0- 100 km;1l (62mph)
M
96/79

Horizontally opposedengine,liquidcooled

6
3.94 in./lOO mm
3.0 in./76.4 mm
219.7 cu.in./3600 cm
3

11.7:1
380 hp/280 kW
7400 rpm
285 ft.Ib./385 Nm
5000 rpm
1680 W/120 A
Stationar yhigh-voltage distribution,sequentialinjection,
cylinder-selective knock-control,stereooxygen sensorclosed-loop control,diagnostic system,
4 overhead camshafts, PorscheVarioCam, hydraulicvalveclearance compensation
190 mph/306 km;1l
4.5 seconds

*
At DIN empty weight andhalfload, without performance-inhibiting extraequipment
Technical Data

Transmission
1 st gear
2nd gear
3rd gear
4th gear
5th gear
6th gear
Reverse
Final drive ratio

lire Pressures forcold tires
3.82:
1

2.15:1 1.56 :1
1.21 :1

1.00 :1

0.85: 1

2.86: 1

3.44:1

Summer tiresandsnow tires
Front 32psi(2.2 bar)overpressure
Rear 39psi (2.7 bar)overpressure
These tirepressures applyonlytothe tire makes andtypes approved byPorsche.
Please observe thechapter "TIRESIWHEELS" onPage 141.
TechnicalData

Tires,Rims,Tracks

Tire RimRimoffset
Track
Summer tires
front
235/40ZR18(91 Y)
8.5Jx 18 H2 40mm
58.6in/1488 mm
rear 295/30ZR18(98Y)
11Jx 18 H2
63mm 58.6in/1488 mm

Snow tires
front
225/40R18 92V M+S XL 8Jx 18 H2
50mm 57.8in/1468 mm
rear 265/35R18 97V M+S XL
*

10Jx18H2 65mm 58.4in/1484 mm
The load capacity coefficient (e.g."92") andmaximum speedcodeletter (e.g."V")areminimum requirements.

/i\
Warning!
Installation ofsizes notauthorized by
Porsche mayhave adangerous effecton
the driving stability andcould result in
severe personal injuryordeath.
I>
Before mounting newtires, check withyour
Porsche dealeraboutthecurrent release
status.

Tire andrimsizes
Extensive testsareperformed beforespecific tiresandwheels areapproved byPorsche. YourPorsche dealerhasinfor-
mation aboutapproved tiresandwheels andishappy toassist you.
If aftermarket tiresand/or wheels areinstalled whicharenotapproved byPorsche, thevehicle's roadability andhandling
characteristics mightbeimpaired. SincePorsche hasnodata onsuch combinations, Porschecannotstandbehind the
safety ordurability ofthese aftermarket combinations.

Snow chains
Canbemounted onlyonthe rear wheels;
maximum speed30mph/50 km/h.

Use only Porsche authorized fine-linkcross-type oredge chains.

Snow chain clearance canbeguaranteed onlyonthe tire
+
rim combination marked*.

Technical Data