Opel Kadett C GT/E group 2 (1975)
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Home » Rally Cars » Opel Kadett C GT/E
20493077860_b2a0e7b680_b.jpg Source Development chain
1967: Opel Kadett B
1975: Opel Kadett C GT/E
1978: Opel Kadett C GT/E E2
1982: Opel Kadett D GT/E
1984: Opel Kadett E 1.8 GSi
1987: Opel Kadett E 2.0 GSi
1988: Opel Kadett E GSi 16V
1992: Opel Astra F GSI 16V

History site, group 4 history
In rally: see video

Specifications

Black/yellow - 8660 units produced between 1975 and 1977

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Opel CIH 19S
1996cc (95.4x69.8)
works team: 210 HP @ 8200 rpm
works team: 235-240 HP for 16V version
9 x 15"

Group/Class 2 Homologation number: 644 and 5624
Years active 1975 - 1977 Homologation start: 1/10/1975 and 1/2/1976
Homologation end: 1/2/1976 and 31/12/1981
Engine
Type Opel CIH 19E, straight 4cyl, 4 stroke located front longitudinal
Capacity 1897 cc WRC: 1897 cc
Bore x Stroke (mm) 93.0 x 69.8
Compression ratio 9.6:1, 11.4:1
Output power - torgue 105 HP @ 5400 rpm
160-180 HP
15.5 kgm @ 4200 rpm
240 Nm @ 5800 rpm
Main bearings forged steel crankshaft with 5 main bearings 58mm diameter forged steel connecting rod length between centers 128 mm, big end bearing diameter 55mm, 24.8mm width, aluminium alloy piston with 45mm compression height, 22mm pin diameter
Materials block: grey cast iron, 208mm deck height cylinderhead: reverse flow cast iron with "wedge" shape combustion chamber.
Group 4: cross flow aluminium alloy with hemispherical combustion chambers (8V and 16V)
Cams/valves single overhead camshaft in head (CIH) (SOHC), chain driven. Operation with rocker arms and cam followers 2 valves/cyl. - 8 valves total. 42mm inlet valve diameter, 34mm (group 4: 35mm) exhaust valve diameter. 0o angle between valves and vertical.
Group 4: 4 valves/cyl - 16 valves total
Aspiration natural, Bosch jetronic multipoint fuel injection
Ignition electronic, firing order 1-3-4-2
Cooling system jacketed watercooled with pump, radiator, 360 mm diameter-5 blades fan and thermostat 7 lt
Lubrication system wet sump, group 2 and 4: dry sump 4.1 lt
Transmission
Type rear wheel drive Opel 4 speed, or ZF S5-18/3 5 speed gearbox (see here)
Gearbox ratios constant: 1.167/1 (21/18)
1st: 2.873/1 (32/13)
2nd: 1.751/1 (24/16)
3rd: 1.290/1 (21/19)
4th: 1.00/1 (-)
R: 2.69/1 (30/13)
constant: 1.259/1 (34/27)
1st: 2.99/1 (38/16)
2nd: 1.76/1 (35/25)
3rd: 1.305/1 (31/30)
4th: 1.000/1 (-)
5th: 0.874/1 (25/36)
R: 3.64/1
group 2: constant: 1.259/1 (34/27)
1st: 3.873/1 (40/13)
2nd: 2.398/1 (40/21)
3rd: 1.727/1 (35/25)
4th: 1.259/1 (30/30)
5th: 1.000/1 (-)
R: 3.67/1
1978 group 2: constant: 1.033/1 (31/30)
1st: 2.30/1 (38/16)
2nd: 1.8/1 (39/21)
3rd: 1.36/1 (35/25)
4th: 1.14/1 (33/28)
5th: 1.000/1 (-)
R: 2.83/1 (32/11)
Group 4: Getrag 256/9
1st: 3.368/1
2nd: 2.160/1
3rd: 1.580/1
4th: 1.240/1
5th: 1.0/1
R: 4.0/1
Diffrential ratio 3.444/1 (31/9), 3.667/1 (33/9), 4.750/1 (38/8), 4.222/1 (38/9), group 2: 3.182/1 (35/11), 5.286/1 (37/7), 3.889/1 (35/9) Type 32, hypoid spiral bevel gears limited slip rear differential
Clutch dry single disk, 204mm diameter. Group 4: double plate 184 mm diameter
Chassis-body
Type steel monocoque Opel Kadett C chassis of GM T platform with front steel suspension cross member and roll-cage. 2 door coupe/liftback steel bodyshell with steel bumbers. Group 2 and 4: extended wheel arches
1977: front and rear spoilers
Front suspension double unequal wishbones with coil springs, Bilstein telescopic gas shock absorbers and anti roll bar
Rear suspension live axle with 2 longitudinal radius arms, panhard rod, coil springs and Bilstein telescopic gas shock absorbers
Steering system rack and pinion (no servo) 3 turns lock to lock
Brakes front solid disks 244mm diameter with 2 piston calipers.Rear drums 230mm diameter with 1 double piston caliper 19mm diameter.
Group 2 and 4: front ventilated disks 238mm diameter with 4 piston calipers 42mm diameter, rear ventilated disks 238mm diameter with 2 piston calipers 42mm diameter. 1977: caliper water injection system for cooling
dual circuit with vacuum servo
Dimensions
length: 4.124 m (162.4 in) width: 1.594 m (62.8 in), group 2 & 4: +100mm height: 1.355 m (52.6 in)
wheelbase: 2.395 m (94.3 in) front track: 1.318 m (51.9 in) rear track: 1.314 m (51.7 in)
Rims - tires steel 5.5" - 6" - 8 "x 13" M&S 35 Tyres or P7, 175/70 HR 13 (195/60 R 15)
Weight 850 kg
Fuel tank 50 lt, group 2: 100 lt

Results in WSCC

Season
Car entry Car number/ result
Daytona Mugello Silver stone Nurb Watkins Glen Mosport Brands Hatch Hocke nheim Valle lunga
Team 24h 6h 6h 1000km 6h 6h 6h 6h 6h
Valvoline Racing #92, dns
Karl-Friedrich Hunold/ Werner Muschak/ Hermann Molitor #96, dnt qualify
Statistics
Works Starts/finishes 2/0 2/0
Driver Team entries and car number
Valvoline Racing
Josef Wilhelmy 92
Udo Piesack 92

Results in WRC

Works team: Opel Euro Händler Team

Season
Group 4 entries
Entry Rally event
Driver
Codriver
Team M.C SVE KEN GRE MAR POR FIN S.R TdC RAC
Walter Röhrl
Jochen Berger
works prop shaft trans mission
Rauno Aaltonen
Claes Billstam
works gear box
Anders Kulläng
Claes-Göran Andersson
works piston
Henri Greder
'Celigny'
Greder Racing 10th
Tony Pond
David Richards
Dealer Team Opel 4th
Ian Wilson
Peter Anderson
dnf
Total points
()
8 1 7
Statistics
Works starts/finishes 4/0 1/0 3/0
Others starts/finishes 3/2 1/1 2/1

Article from 4T 82, 7/1977

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Opel-Kadett-C-GT-E-Safari-474x316-1f9925400f5150a4.jpg Source
Safari '76
big-65955979c0.jpg?v=1 Source
Angelo Presotto San Remo '77
2015_Rally_Bohemia_-_Rally_Legend_-_Opel_Kadett_C-GT_E_16v_-_H%C3%A4nninen.JPG Source
16V
opelkadettcrallye01-15.jpg Source

Drawings

opel_kadett-gt-e-rallye-car-c-1976-77_r1.jpg Source
latest?cb=20160114164359 Source
opel-kadett-c-gte-rallye-1979.png Source

Gearbox

ZF%20S5-18_3.JPG Source
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