Porsche 2012 911 GT3 CUP User manual

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.

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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

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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

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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

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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: [phone]
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: [phone]
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: [phone]
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: [phone]

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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

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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

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3.2. Engine power and torque curves