SEPTEMBER 2019 http://www.racecar-engineering.com 11manydifferentweatherconditionsandsurfaces
onwhichthesecarsrace.
Overall,theconceptofthecaris similarto
theolderversion;thesamemid-enginelayout
andnormallyaspiratedflatsix,anditsweight
distributionis alsosimilar.Butunderneaththere
hasbeenplentyofchange.‘Wehavemade
significantprogressinthedevelopmentofour
carforthenextthree-yearhomologationperiod,
especiallyinthecomplexareasofdriveability,
efficiency,durabilityandserviceability,’says
PascalZurlinden,DirectorofFactoryGT
MotorsportatPorsche.‘Theonlycomponents
thatwehavekeptunchangedfromthe
predecessoraretheheadlights,brakesystem,
clutch,driver’sseatandpartsofthesuspension.’
Customerfocus
Thekeydifference,though,is oneofapproach.
Thisyear’scarhasbeendevelopedwithmore
ofa GT3philosophy,withmaximumcustomer
involvementinthedecisionmaking.While
theoldcarwasgoodenoughtowintheGTE
Amtitleintheworldchampionship,Porsche
stillconsultedwiththe,drivers,engineersand
themechanicsofitscustomerteamsbefore
finalisingthespecofthenewcar.
Thisis quitea statementofintentfrom
PorscheastheAmcategoryintheWECis
allowedtoruncarsthathavecompetedthe
previousseason,andsoPorscheclearlyhasa
long-termvisionforthecategorythatis not
apparentlysharedbyothermanufacturers.It is
onlytheWECthathasa categoryforcustomers
ofGTEcars;intheStatesit is GT3-basedcarsthat
formthecustomerracingclass.Thecustomer-
focussedphilosophyis evidenteverywhereon
thenewPorscheGTE;it’sallabouteaseofuse,
fromthecockpitforthedrivers,tothewider
operatingwindow,makingit easiertosetup.
‘Fortheelectronicswelearneda lotfrom
ourcustomers,’Zurlindensays.‘Weaskedall
thecustomerdrivers,andthebronzedrivers,
andours[worksdrivers],sothecockpitlayout
is brandnew.It is allmadeaccordingtothese
driverrequests.If youtakea lookatthesteering
wheel,it is morelikeanLMP1steeringwheel,
becauseit is easierforcustomersnottolook
acrossthecockpit,sowetriedtoputasmuch
aswecouldonthesteeringwheel.’The car has been developed with more of a
GT3 philosophy, with maximum customer
involvement in the decision making
Body
Weight-optimised bodyshell in aluminium-steel composite design;
removable roof hatch; FT3 fuel cell in the front of the car; welded-in
roll cage; aerodynamically-optimised and quick-release body
components made of CFRP; rear wing with swan neck mounts.
Engine
Water-cooled 6-cylinder boxer positioned in front of the rear axle;
capacity, 4194cc; stroke 81.5mm; bore 104.5mm; power, 378kW
(515bhp) depending of restrictor; 4-valve technology; direct fuel
injection; dry sump lubrication; single mass flywheel; power output
limitation via restrictor; electronic throttle; side-exit exhaust system.
Transmission
Weight-optimised 6-speed sequential constant-mesh gearbox;
twin-shaft longitudinal layout with bevel gear; shifting via
electronic shift actuator; shift paddles on the steering wheel;
magnesium gearbox casing; multi-disc self-locking differential
with visco unit; three disc carbon race clutch.
Suspension
Front axle: double wishbone; four-way vibration damper with
coil spring set-up; anti-roll bars, adjustable by blade position;
electro-hydraulic power steering. Rear axle: integrated rear-axle
subframe with double wishbone axle; 4-way vibration damper with
coil spring set-up; anti-roll bars, adjustable by blade positions;
electro-hydraulic power steering; tripod driveshafts.
Electronics
Cosworth Central Logger Unit; CFRP multi-functional steering
wheel with integrated display; shift paddles and quick release;
Collision Avoidance System; controlled alternator in connection
with LiFePo4 battery; LED headlights; LED tail-lights plus rain light;
illuminated car number and leader light system; electric adjustable
wing mirrors with memory function; tyre pressure monitoring system
(TPMS); drink system; air conditioning system; membrane switch
panel on centre console with fluorescent labelling.
Brakes
Two independent brake circuits for front and rear axle, adjustable via
balance bar. Front axle: one piece aluminium 6-piston racing calipers
with quick release coupling; internally ventilated steel brake discs,
390mm diameter; race brake pads; optimised brake cooling ducts.
Rear axle: one piece aluminium 4-piston racing calipers with quick
release coupling; internally ventilated steel brake discs, 355mm
diameter; race brake pads; optimised brake cooling ducts.
Wheels and tyres
Front axle: one piece forged light alloy wheels, 12.5Jx18 offset
25 with centre-lock nut and wheel nuts; Michelin slick 30/68-18.
Rear axle: one piece forged light alloy wheels, 13Jx18 offset 37
with centre lock nut and wheel nuts; Michelin slick 31/71-18.
Dimensions
Length, 4593mm (without splitter, rear wing, diffuser); width,
2042mm (front axle), 2050mm (rear axle); wheelbase, 2513mm.
Weight
Base weight 1245kg.TECH SPEC: Porsche 911 RSR GTEThere has been an improvement in overall downforce, while aero set up should be easier for customer teams
Driver-friendly steering wheel is crammed with info