Porsche 911 GT3 R (991.1) (2016-2018) – Specifications & Performance

(2016-2018) Porsche 911 GT3 Cup (991.1) Technical Specifications

Powering the new 911 GT3 R is a cutting-edge four-litre flat-six unit which is largely identical to the high-performance production engine of the road-legal 911 GT3 RS. Direct petrol injection, which operates at pressures up to 200 bar, as well as variable valve timing technology ensure a particularly efficient use of fuel. Moreover, the normally-aspirated engine offers significantly better driveability and a broader usable rev range. Power from the rear engine is transferred to the 310 mm rear wheels via a Porsche sequential six-speed constant-mesh gearbox. As in the GT road-going models of the 911, the driver changes gears via shift paddles conveniently positioned on the steering wheel.

Concept:

• Single-seat customer racecar

Basis:

• 991 GT3 RS

Engine:

• Water cooled six-cylinder Boxer engine (rear mounted)
• 4,000 cm3; stroke 81.5 mm; bore 102 mm
• Power: Subject to FIA BoP classification (air restrictor)
• Single mass flywheel
• Four-valve technology
• Direct fuel injection
• Fuel quality: Super Plus lead free to E20 (minimum 98 octane)
• Dry sump lubrication
• Engine control unit (ECU) BOSCH MS 6.4 with integrated data acquisition
• (basic memory 1GB, max. 100 freely selectable channels, sample rate 50hz)
• Race exhaust system (motorsport catalyst and country-specific pre-silencer optionally
  available)
• Rear silencer with twin tailpipes mounted centrally
• Two electronically activated throttles

Transmission:

• Porsche six-speed constant-mesh gearbox (sequential)
• Gear ratios (FIA homologated, other ratios available on request):
  • – CWP 14/22 i = 1.571
  • – Final drive 17/41 i = 2.412
  • – 1st gear 13/41 i = 3.154
  • – 2nd gear 17/39 i = 2.294
  • – 3rd gear 20/37 i = 1.850
  • – 4th gear 19/29 i = 1.526
  • – 5th gear 24/31 i = 1.292
  • – 6th gear 31/34 i = 1.097
• Internal pressurized oil lubrication with active oil cooling by oil/water heat exchanger
• Mechanical limited slip differential
• Motorsport clutch (carbon)
• Pneumatic gear shift activation (paddle shift)

Rear Wing

• CFRP front extended wheel arches and louvres
• CFRP front fairing with cooling-air ducting and spoiler lip
• CFRP rear fairing with integrated rain light in accordance with FIA regulations
• Polycarbonate front, rear and side screens
• Removable polycarbonate door windows in accordance in accordance with latest FIA regulations
• Rear underfloor with air ducting for brake and driveshaft cooling

Modified 911 cockpit:

• Ergonomic center console aligned towards driver for ease of operation
• Switch covers with fluorescent labelling
• Steering wheel with quick release coupling, switch panel and shift paddles
• Racing bucket seat with fore/aft adjustment in accordance with FIA regulations:
• Adjustable padding system to suit individual drivers (delivery with size M)
• Six-point safety harness
• Safety nets (centre and driver´s side) in accordance with FIA regulations
• FT3 safety fuel cell (approx. 120 liter) with fuel cut off safety valve in accordance with FIA regulations
• Air jack system (four jacks)

Brake system:

• Two separate brake-circuits for front and rear axles. Adjustable by driver via brake balance bar

Front axle:

• Six-piston aluminum-monobloc racing brake caliper with Pad retraction system
• Ventilated and grooved steel brake disc D = 380 mm, aluminum disc bell
• Motorsport brake pads
• Optimized brake cooling ducts

Rear axle:

• Four-piston aluminum-monobloc racing brake caliper with Pad retraction system
• Ventilated and grooved steel brake disc D = 372 mm, aluminum disc bell
• Motorsport brake pads
• Optimized brake cooling ducts

Weight/dimensions:

• Total weight: approx. 1,220 kg (subject to BoP)
• Overall length: 4,604 mm
• Overall width front axle: 1,975 mm
• Overall width rear axle: 2,002 mm
• Wheelbase: 2,458 mm

Suspension:

Front axle:

• McPherson strut, adjustable in height (ride-height), camber and toe
• Fabricated steel control arms:
• Stiffness optimized
• High-performance spherical bearings
• Wheel hubs with center lock wheel nuts
• Adjustable motorsport dampers
• Machined aluminum top mount with camber adjustment
• Adjustable anti-roll bar blades (left & right)
• Power assisted steering with electrohydraulic pressure feed

Rear axle:

• Multilink independent rear suspension, adjustable in height (ride-height), camber, toe
• Machined aluminum control arms:
• Stiffness optimized
• High-performance spherical bearings
• Wheel hubs with center lock wheel nuts
• Adjustable motorsport dampers
• Machined aluminum mounts
• Adjustable anti-roll bar blades (left & right)

Wheels/tires:

Front axle:

• One piece BBS alloy wheels according to Porsche specification and design,
• 12.0 x 18 offset 17
• Michelin transport tires, tire dimensions: 300/650-18

Rear axle:

• One piece BBS alloy wheels according to Porsche specification and design,
• 13.0 x 18 offset 37.5
• Michelin transport tires, tire dimensions: 310/710-18

Electric:

• COSWORTH color display ICD (basic memory 512MB, extendable)
• COSWORTH power module IPS32
• Race ABS (adjustable)
• Traction control (adjustable)
• Fire extinguisher system (agent: gas) with additional retaining bracket for fire extinguisher
• Battery 12 V, 70 Ah (AGM), leak proof, mounted in passenger foot well
• 180 A alternator
• Windscreen wiper with direct drive
• Lighting system:
• Xenon main headlights
• LED technology taillights and rain light