2004 PORSCHE 911 GT3 tires

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

A
Safety notes!

Motor racing isaterm weassociate withfascina-
tion andemotion.
On the one hand.
On the other hand, there's thetechnology that
makes thisfascination possible.
Your new911 GT3 hasbeen developed withexpe-
rience gained fromthedevelopment anduseof
countless GTvehicles, andhasbeen equipped
with technical preconditions thatfacilitate use
away frompublic roadsinmotor racing.
Depending onuse, itcan bepossible ornecessary
to adapt thevehicle tothe respective conditions.
In the case, itmust always betaken intoaccount
that amodern high-performance sportscarrepre-
sents acomplex systemwithindividual compo-
nents thatarecarefully adjusted towork together
perfectly.
Interfering inthis system isonly anoption ifitcan
be guaranteed thatallofthe components willcon-
tinue towork together inamanner adjusted tothe
actual conditions ofuse. Well-founded specialist
knowledge isnecessary forthis. Youshould seek
advice fromyourauthorized Porschedealer.
Here, youwillreceive information aboutsports
parts available fromPorsche, theirreliability on
public roadsandimportant maintenance notes.

8
Please
bearinmind thatuseonrace tracks sub-
jects allvehicle components toconsiderably more
wear thannormal use,making professional in-
spection andmaintenance aftereach useavital
preconditon forfunctioning andsafety.
Please useonly Original Porsche Partsforyour
car. These partsareavailable fromyourautho-
rized Porsche dealer,whichisconversant withthe
range ofapproved partsandwillbepleased toad-
vise youfurther.
Porsche acceptsresponsibility, inaccordance
with itslegal obligations, forGenuine Porsche
Parts andforparts andaccessories whichithas
approved foryour car.However, theuse ofother
parts oraccessories whichareneither Genuine
Porsche Partsnorapproved byPorsche mayad-
versely affectthesafety ofyour car,andPorsche
can take noresponsibility forany loss ordamage
caused bytheir use.
Even ifthe supplier ofother accessories orparts
is arecognised supplier,thesafety ofyour car
may stillbeaffected ifsuch items areinstalled.
Due tothe large variety ofproducts offeredinthe
accessory marketitis not possible forPorsche to
inspect andapprove everyone.
In addition, pleasenotethattheuse ofreplace-
ment parts which arenotGenuine Porsche Parts
or approved partsorthe use ofaccessories not
approved byPorsche mayalsodetrimentally
affect theWarranties relatingtoyour car.
Technical
modifications

Modifications maybecarried outonyour vehicle
only ifapproved byPorsche.This ensuresthat
your Porsche willremain reliable andsafe todrive
and that itwill notbedamaged asaresult ofthe'
modifications.Your authorizedPorschedealerwill
be pleased toadvise you.

Coverings
~ Donot affix anycoverings (e.g.films or"stone
guards") inthe area ofthe headlights andair
intakes. Damage duetoexcessive temperatures and
abrasion couldresult.

Motor racing

For reasons ofsafety, thebraking system, steer-
ing, running gear,wheels andtires ofyour car
should bechecked afterevery race.
On public highways, therunning gearandrear
spoiler mustbeinthe standard position.

DearPorsche Owner

A lot has gone intothemanufacture ofyour
Porsche, includingadvanced engineering, rigid
quality control anddemanding inspections.
These engineering andsafety features willbe
enhanced byyou ...

the safe driver ...

- who knows hiscar and allcontrols,
- who maintains thevehicle properly,
- who uses driving skillswisely andalways
drives withinher/his owncapabilities andthe
level offamiliarity withthevehicle.
You willfind helpful hintsinthis manual onhow to
perform mostofthe checks listedonthe following
pages.
If in doubt, havethese checks performed byyour
authorized Porschedealer.
Controls, Instruments
Before
driving off...

Check thefollowing itemsfirst

I>
Turn theengine offbefore youattempt any
checks orrepairs onthe vehicle.

I>
Besure thetires areinflated correctly.
Check tiresfordamage andtirewear.

I>
See that wheel boltsareproperly tightened
and notloose ormissing.

I>
Check engine oillevel, addifnecessary.
Make itahabit tohave engine oilchecked with
every fuelfilling.

I>
Check allfluid levels suchaswindshield
washer andbrake fluidlevels.

I>
Besure thevehicle battery iswell charged and
cranks theengine properly.

I>
Check alldoors andlidsforproper operation
and latch them properly.

I>
Check, andifnecessary replacewornor
cracked wiperblades.

I>
See that allwindows areclear andunob-
structed.

I>
Check airintake slotsandarea between lug-
gage compartment lidand windshield arefree
of snow andice,sothe heater andthewind-
shield wipers workproperly.
I>

Ifachild willberiding inthe vehicle, check
child seat/child seatrestraint systemtoen-
sure thatrestraints areproperly adjusted.

I>
Check allexterior andinterior lightsforopera-
tion andthat thelenses areclean.

I>
Check theheadlights forproper aim,andif
necessary, havethem adjusted.

I>
Check underthevehicle forleaks.

I>
Besure allluggage isstowed securely.

Emergency equipment

It is good practice tocarry emergency equipment
in your vehicle.
Some ofthe items youshould haveare:
window scraper, snowbrush, container orbag of
sand orsalt, emergency light,small shovel, first-
aid kit, etc.

Inthe driver's seat...

c>
Check operation ofthe horn.

c>
Position seatforeasy reach offoot pedals and
controls.
To reduce thepossibility ofinjury fromthe
airbag deployment, youshould always sitback
as far from thesteering wheelasispractical,
while stillmaintaining fullvehicle control.

c>
Adjustthe insideandoutside rearview mirrors.

c>
Buckle yoursafety belts.

C>
Check operation ofthe foot andparking brake.

C>
Check allwarning andindicator lightswith
ignition onand engine notrunning.

C>
Start engine andcheck allwarning displays for
warning symbols.

C>
Never leaveanidling carunattended.

C>
Lock doors frominside, especially withchil-
dren inthe cartoprevent inadvertent opening
of doors frominside oroutside.
Drive withdoors locked.
On
the road ...

C>
Never driveafteryouhave consumed alcohol
or drugs.

C>
Always haveyoursafety beltfastened.

C>
Always drivedefensively.
Expect theunexpected.

C>
Use signals toindicate turnsandlane changes.

C>
Turn onheadlights atdusk orwhen thedriving
conditions warrantit.

C>
Always keepasafe distance fromthevehicle
in front ofyou, depending ontraffic, roadand
weather conditions.

C>
Reduce speedatnight andduring inclement
weather. Driving inwet weather requirescautionandre-
duced speeds, particularly onroads with
standing water,asthe handling characteristics
of the vehicle maybeimpaired duetohydro-
planing ofthe tires.

C>
Always observe speedlimitsandobey road
signs andtraffic laws.

C>
When tired,getwell offthe road, stopandtake
a rest. Turntheengine off.Donot sitinthe ve-
hicle withengine idling.
Please observe thechapter "ENGINE EX-
HAUST" onPage 10.
C>

When parked, alwayssetthe parking brake.
Move thegearshift levertoreverse orfirst
gear.
On hills also turnthefront wheels towardthe
curb.

C>
When emergency repairsbecome necessary,
move thevehicle welloffthe road. Turnonthe
emergency flasheranduseother warning de-
vices toalert other motorists. Donot park or
operate thevehicle inareas where thehotex-
haust system maycome incontact withdry
grass, brush,fuelspill orother flammable ma-
terial.

C>
Make itahabit tohave theengine oilchecked
with every fuelfilling.
Controls, Instruments

Break inhints forthe first
1,000 miles/l,600 kilometers
The following tipswillbehelpful inobtaining opti-
mum performance fromyournewPorsche.
Despite themost modern, high-precision manufac-
turing methods, itcannot becompletely avoided
that themoving partshavetowear inwith each
other. Thiswearing-in occursmainlyinthe first
1,000 milesj1,600 km.

Therefore:
I>
Preferably takelonger trips.

I>
Avoid frequent coldstarts withshort-distance
driving whenever possible.

I>
Avoid fullthrottle startsandabrupt stops.

I>
Donot exceed maximum enginespeedof
4,200 rpm(revolutions perminute).

I>
Donot run acold engine athigh rpmeither in
Neutral oringear.

I>
Donot letthe engine labor,especially when
driving uphill.Shifttothe next lower gearin
time (usethemost favorable rpmrange).

I>
Never lugthe engine inhigh gear atlow
speeds. Thisruleapplies atall times, notjust
during thebreak-in period.
Controls, Instruments
I>

Donot participate inmotor racing events,
sports driving schools, etc.during thefirst
1,000 milesj1,600 kilometers.
There maybeaslight stiffness inthe steering,
gear-shifting orother controls duringthebreak-in
period whichwillgradually disappear.

Break inbrake padsanddiscs

New brake padsanddiscs havetobe "broken in",
and therefore onlyattain optimal frictionwhenthe
car has covered severalhundred milesorkm.
The slightly reduced brakingabilitymustbecom-
pensated forbypressing thebrake pedalharder.
This alsoapplies whenever thebrake padsand
brake discsarereplaced.

New tires

New tires donot have maximum traction.They
tend tobe slippery.

I>
Break innew tires bydriving atmoderate
speeds duringthefirst 60to120 milesj1 00to
200 km.Longer braking distances mustbean-
ticipated.
Engine
oilconsumption

During thebreak-in periodoilconsumption maybe
higher thannormal.
As always, therate ofoil consumption dependson
the quality andviscosity ofoil, the speed atwhich
the engine isoperated, theclimate androad con-
ditions, aswell asthe amount ofdilution andoxi-
dation ofthe lubricant.

I>
Make ahabit ofchecking engineoilwith every
fuel filling, addifnecessary.

Operation ofthe ABS system
A wheel speed sensor ismounted toeach ofthe
four wheels. Ifwheel lock-up ofeither ofthe front
wheels orthe rear wheels issensed duringbrak-
ing, thebrake pressure isadjusted automatically
until thewheel nolonger slips.Thebrake pressure
is regulated foreach frontwheel individually and
for both ofthe rear wheels together.
On aroad surface whichisslippery ononly one
side, therear wheel whichisbraking onthe slip-
pery surface determines thebrake pressure which
will beapplied equallytoboth rearwheels. Thisen-
sures thatdirectional stabilityismaintained. How-
ever, ifbraking forcesapproach thewheel lock-up
point forallwheels (panicbraking) theABS system
will intervene toprovide arapid rythmic braking.
The proper operation ofABS isperceived bythe
driver asapulsating brakepedalinconjunction
with audible noiseandperhaps somevibration.

I>
Ifyou experience thesesensations whiledriv-
ing oraroad surface withquestionable trac-
tion, reduce vehicle speedappropriate forthe
prevailing roadconditions.
The functional readinessofall the main electrical
components ofthe ABS ischecked byan
electronic monitoring systembothbefore and
while youdrive. •
Warning lightUSA
• Warning lightCanada
When theignition isswitched onthe ABS warning
light willlight upwhile thesystem iselectronically
interrogated andgoes outwhen theengine is
started ifthe check isnot yetcomplete.
If the ABS warning lampfailstogo out, thisindi-
cates thatABS hasbeen deactivated duetoa
fault. Ifthe warning lightsinthe instrument panel
and on-board computer lightupwhile youaredriv-
ing, this indicates thatafault hasoccurred. Inboth
cases, normal braking, asinvehicles withoutABS,
is still retained.
The ABS system should,however, beexamined at
an authorized Porschedealerimmediately topre-
vent theoccurrence offurther faults.

I>
Ifthe ABS system becomes inoperative, take
your vehicle toyour authorized Porschedealer
immediately.
A

Warning!
The control unitofthe ABS brake system is
set forstandard tiresize. Ifnon-standard
tires areinstalled, thecontrol unitmay mis-
interpret thespeed ofthe vehicle, because of
the variant dataitreceives fromthesensors
on the axles.

I>
Use only tiremakes andtypes tested by
Porsche.
Controls,Instruments

FuelEconomy

Fuel economy willvary depending onwhere,
when andhow youdrive, optional equipment
installed, andthegeneral condition ofyour
car.
A car tuned tospecifications andcorrectly
maintained, willhelp youtoachieve optimal
fuel economy.

~ Have yourvehicle tunedtospecifications.
Air cleaner shouldbedirt free toallow proper
engine "breathing".
Battery shouldbefully charged.
Wheels shouldbeproperly aligned.
Tires should beinflated atcorrect pressure.
~ Always monitor yourfuelconsumption.
~ Drive smoothly, avoidabrupt changes inspeed
as much aspossible.
~ Avoid jackrabbit startsandsudden stops.
~ Donot drive longer thannecessary inthe lower
gears. Shifting intoahigher gearearly without
lugging theengine willhelp save fuel.
~ Prolonged "warmup"idling wastes gas.Start
the vehicle justbefore youareready todrive.
Accelerate slowlyandsmoothly.
~ Switch offthe engine ifstationary forlonger
periods.
Maintenance, CarCare ~
Any additional weightcarried inthe vehicle re-
duces fueleconomy. Alwayskeepcargo toa
minimum andremove allunnecessary items.
~ Organize yourtripstotake inseveral errands
in one trip.
~ Allelectrical accessories contributetoin-
creased fuelconsumption.
~ Only switch onthe airconditioning whenneces-
sary.
~ Donot drive withtheRoof Transport System
mounted unlessyouneed it.

The EPA estimated m.p.g.isto be used for
comparison purposes,actualmileage may
be different fromtheestimated m.p.g.,
depending onyour driving speed,weather
conditions andtriplength. Youractual
highway mileagewillprobably beless than
the estimated m.p.g.

~ Please observe alllocal andnational speed
limits.
Operating
YourPorsche inother
Countries

Government regulationsinthe United States and
Canada requirethatautomobiles meetspecific
emission regulations andsafety standards. There-
fore, carsbuiltforthe U.S. andCanada differfrom
vehicles soldinother countries.
If you plan totake your Porsche outsidetheconti-
nentallimits ofthe United States orCanada, there
is the possibility that
- unleaded fuelmay notbeavailable;
- unleaded fuelmay have aconsiderably lower
octane rating.Excessive engineknockandse-
rious damage toboth engine andcatalytic con-
verters couldresult;
- service maybeinadequate duetolack ofprop-
er service facilities, toolsordiagnostic equip-
ment;
- replacement partsmaynotbeavailable orvery
difficult toget.

Porsche cannotberesponsible forthe
mechanical damagethatcould result
because ofinadequate fuel,service orparts
availability.

If you purchased yourPorsche abroadandwant to
bring itback home, besure tofind outabout ship-
ping andforwarding requirements, aswell ascur-
rent import andcustoms regulations.

Storing yourPorsche

If you intend tostore yourPorsche foraprolonged
period, pleaseconsult yourauthorized Porsche
dealer. Thestaff willbeglad toadvise youonthe
most suitable andnecessary methods.
r> Clean yourvehicle thoroughly insideandout-
side.
Clean theengine compartment.
The under carriage andchassis components
should befree ofdirt and saltdeposits.
r> Fillupthe fuel tank.
r> Change theoiland oilfilter, andrunthe engine
for several minutes.
r>

Increase thetire pressure to58 psi (4bar).
It is not recommended tolift the vehicle, dueto
the possibility ofcorrosion onshock absorber
piston shafts.
The vehicle shouldbemoved slightly, approxi-
mately everyfourweeks, toprevent flatspot
on the tires.

Climate control

The airconditioning systemshouldbeingood
working condition andfully charged.

WindshieldjHeadlight washer

r> Check andcorrect antifreeze/cleaning solu-
tion level asnecessary.

Electrical system

r> Remove thebattery fromthevehicle andstore
it in acool dryplace, notonacement floor.

When thebattery isdisconnected, the
alarm system isdeactivated.

r> Recharge thebattery every3months. Ifthe
battery remains inthe vehicle withthecables
connected, itis necessary tocheck, remove
and recharge thebattery every2-3weeks.

Do not fast charge thebattery.

r> Please observe thechapter "SATTERY" on
Page 155.
Vehicle
interior

The interior mustbedry, especially inthe area of
the floor carpets. Theuseofdrying agents (Silica-
Gel) isrecommended invehicles withleather inte-
rior and inareas withhighhumidity. Therecom-
mended amountis3fabric bagsof1.1 Ibs.
(500 grams) eachplaced onthe floor carpets.
Windows, doorsandlidsmust beclosed. Theair
flaps should beopened.
Maintenance, CarCare