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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.

Type Racing Car
Built At Germany
Engine Boxer-6 w/Dry Sump
Position Rear, Longitudinal
Aspiration Natural
Fuel Feed Direct Injection
Displacement 4000 cc / 244.09 in³
Bore 102 mm / 4.02 in
Stroke 81.5 mm / 3.21 in
Power 372.9 kw / 500 bhp
Specific Output 125.0 bhp per litre
Bhp/weight 409.84 bhp per tonne
Body / Frame
Aluminum/Steel Composite Monocoque w/CFRP doors, rear cover, rear wing, wheel arches and front fairing
Driven Wheels RWD
Wheel Type One-piece BBS alloy
Front Tires 300/650-18
Rear Tires 310/710-18
Front Brakes Ventilated & Grooved Steel Discs w/6-Piston Caliper
Rear Brakes Ventilated & Grooved Steel Discs w/4-Piston Caliper
Front Wheels F 45.7 x 30.5 cm / 18 x 12 in
Rear Wheels R 45.7 x 33.0 cm / 18 x 13 in
F Suspension McPherson strut
R Suspension Multilink
Curb Weight 1220 kg / 2690 lbs
Wheelbase 2463 mm / 97.0 in
Length 4604 mm / 181.3 in
Fuel Capacity 120 litres or 31.68 gal.

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
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