Porsche 2012 911 GT3 CUP Manuel utilisateur

Technical Manual

2012 Model

Preface

This technical information will give you the possibility to reference data,

adjustment values and working procedures and make the maintenance

and repair work on the vehicle easier.

We wish you every success with your GT3 Cup

Dr. Ing. h.c. F. Porsche

Aktiengesellschaft

Vertrieb Sonder- und Rennfahrzeuge

Race car 911 GT3 Cup Model 2012

This car is specifically designed for participation in one-make cup

competitions.

For obvious reasons, measurements referring to bodywork dimensions

of the production cars cannot be used as reference.

Porsche accepts no guarantee that the vehicle conforms to the

regulations.

The car can not be registered for road use and does not comply with

German road traffic regulations.

Illustrations, descriptions and schematic drawings serve exclusively as

presentation for the text. Porsche Motorsport accepts no liability for the

completeness and conformity of the contents of this brochure with

respect to the legality of the current regulations.

Contents

1. CONTACTS 4

2. GENERAL TECHNICAL DATA 5

2.1. Dimensions 5

2.2. Weight 5

3. ENGINE 6

3.1. Engine technical data 6

3.2. Engine power and torque curves 7

3.3. Engine lubrication 8

3.4. Engine cooling system 12

3.5. Induction system 18

3.6. Throttle butterfly 18

3.7. Working on the engine 23

3.8. Engine component tightening torques 36

3.9. Engine mileage 37

4. FUEL AND EXHAUST SYSTEM 38

4.1. Fuel system 38

4.2. Fuel cell 39

4.3. Exhaust system 42

5. GEARBOX 46

5.1. Technical data gearbox 46

Gearbox layout 47

5.2. 47

5.3. Modifications 2012 model 48

5.4. Gearbox lubrication 49

5.5. Ratio chart 49

5.6. Gear recognition 50

5.7. Changing gear 51

5.8. Differential 53

5.9. Clutch 54

5.10. Working on the gearbox 57

5.11. Tightening torques gearbox 79

5.12. Gearbox mileage 79

6. SUSPENSION 80

6.1. Front suspension 80

6.2. Rear suspension 84

6.3. Basic wheel alignment 87

6.4. Wheel alignment procedure 88

6.5. Working on the suspension 95

6.6. Tightening torques suspension 96

6.7. Sachs damper service information 106

7. WHEELS 108

8. BRAKE SYSTEM 110

8.1. Technical data brake system (steel) 110

8.2. Technical data brake system (PCCB) 110

8.3. Brake force distribution (brake balance) 111

8.4. Brake caliper 118

8.5. PCCB brake disk information 118

8.6. Tightening torques brake system 119

9. CHASSIS 120

9.1. Interior 120

9.2. Exterior 120

9.3. Rear wing 121

9.4. Fire extinguisher system 122

9.5. Air-jack system 124

10. ELECTRIC 126

10.1. Alternator 126

10.2. Battery 126

10.3. Steering wheel 126

10.4. Centre console 128

10.5. Shift Light Module 129

10.6. MoTeC Dash 130

10.7. Car sensors 134

10.8. Engine Control Unit (ECU) 136

10.9. Relay- and fuse assignment 137

10.10. Fuse carrier 138

11. CAR MAINTENANCE 139

11.1. After approx. 200 km and/or first test 139

11.2. After every session 139

11.3. After every race weekend (sprint) 140

11.4. After 3 - 4 race weekends (sprint) 140

11.5. After 20 respectively 30 hours running time 140

11.6. After 50 hours running time 140

11.7. Operating fluids 141

1. Contacts

International One Make Cups Mr Michael Dreiser 0711 911 82684

Assistant Mrs Juliane Gründl 0711 911 82683

Technical support Mr Marcus Stolzenthaler 0711 911 82498

Fax: 0711 911 82920

Porsche Mobil 1 Supercup Mr Jonas Krauss 0711 911 84042

Assistant Mrs Jennifer Biela 0711 911 84096

Technical support Mr Steffen Höllwarth 0711 911 89922

Fax: 0711 911 82920

Porsche Carrera Cup Germany Mr Helmut Greiner 0711 911 84074

Assistant Mrs Andrea Hagenbach 0711 911 84041

Technical support Mr Stefan Rometsch 0711 911 84613

Fax: 0711 911 82920

Sport parts sales Mr Friedrich Weseler 0711 911 89854

Mr Karlheinz Kienle 0711 911 82923

Mr Klaus Lenzner 0711 911 82423

Mr Christian Müller 0711 911 89175

Mr Salvatore Scozzaro 0711 911 83738

Mr Emanuel Donno 0711 911 82687

Fax: 0711 911 82808

2. General technical data

Engine type M 97/78

Gearbox type G 97/63

Numbers of gears sequential 6

2.1. Dimensions

Length (w/o spoiler edge) [mm] 4423

Width across front axle [mm] 1787

Width across rear axle [mm] 1859

Wheelbase [mm] 2353

2.2. Weight

Dry weight [kg] appr. 1200

With steel brakes, without front exhaust silencer

3. Engine

The engine is based on the power unit fitted to the road approved

911 GT3 and is specially modified for motorsport purposes.

The engine is fitted with a dry sump lubrication system; the oil tank is

mounted directly on the engine. The engine oil is cooled by an oil-water

heat-exchanger integrated in the cooling system.

3.1. Engine technical data

Engine type M97/78

Design Six-cylinder boxer

Cylinders 6

Bore [mm] 102.7

Stroke [mm] 76.4

Cubic capacity [cm³] 3797

Compression ratio approx. 12 : 1

Maximum revs [rpm] 8,500

Inlet valve diameter [mm] 41

Inlet valve lift [mm] 12.0

Point of maximum

inlet valve lift [°] 105 after TDC

Exhaust valve

diameter [mm] 35.5

Exhaust valve lift [mm] 12.0

Point of maximum

exhaust valve lift [°] 110 before TDC

Cooling media Water cooled

Lubrication

Dry sump lubrication

Oil-water heat-exchanger

3.2. Engine power and torque curves

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