Opel Ascona B 2.0 group 2 (1978)
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Home » Rally Cars » Opel Ascona B 2.0
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1971: Opel Ascona A SR
1978: Opel Ascona B 2.0
Development level
Group 4
Group 2

Specifications

Group/Class 2/3 or A/7 Homologation number: 5612 (02/01F) and A 5067
Years active 1978-1985 Homologation start: 1/8/1978 and 1/10/1982
Engine
Type Opel CIH 20E, straight 4cyl, 4 stroke. Click here located front longitudinal
Capacity 1979 cc WRC: 1979 cc
Bore x Stroke (mm) 95.0 x 69.8
Compression ratio 11.5:1
Output power - torgue 160 - 185 HP / 7100 rpm 21.4 kgm (210 Nm) / 5500 rpm
Main bearings 5 of 58mm diameter connecting rod length between centers 128mm, big end bearing internal diameter 55mm
Materials block: cast iron cylinderhead: cast iron
Cams/valves single overhead camshaft (SOHC), chain driven 2 valves/cyl. - 8 valves total. 42mm inlet valve diameter, 37mm exhaust valve diameter. Operation with rocker arms and cam followers. 25o angle between exhaust/inlet valves and vertical
Aspiration natural, 1 x GM Strasburg Varajet II twin carburator, or 1 x Zenith 35/40 INAT twin carburator, or 2 x Solex 45 ADDHE twin carburators, 1980+: Bosch L-jetronic electronic multipoint fuel injection
Ignition electronic, firing order 1-3-4-2
Cooling system watercooled 7 lt
Lubrication system dry sump
Transmission
Type rear wheel drive 4 speed or ZF S5-18/3 5 speed gearbox
Gearbox ratios constant input: 1.167/1 (21/18)
1st: 2.871/1 (32/13)
2nd: 1.751/1 (24/16)
3rd: 1.289/1 (21/19)
4th: 1.000/1
R: 2.692/1 (18/13 x 30/18)
constant input: 1.438/1 (23/16)
1st: 3.427/1 (31/13)
2nd: 2.157/1 (24/16)
3rd: 1.366/1 (19/20)
4th: 1.000/1
R: 3.318/1 (18/13 x 30/18)
constant input: 0.968/1 (30/31)
1st: 2.299/1 (38/16)
2nd: 1.798/1 (39/21)
3rd: 1.355/1 (35/25)
4th: 1.141/1 (33/28)
5th: 1.000/1
R: 2.816 (18/11 x 32/18)
constant input: 1.259/1 (34/27)
1st: 2.990/1 (38/16)
2nd: 1.758/1 (35/25)
3rd: 1.304/1 (31/30)
4th: 1.000/1
5th: 0.874/1 (25/36)
R: 3.670 (18/11 x 32/18)
1980+: constant input: 1.526/1 (29/19)
1st: 3.639/1 (31/13)
2nd: 2.119/1 (25/18)
3rd: 1.335/1 (21/24)
4th: 1.000/1
R: 3.522/1 (30/18 x 18/13)
Diffrential ratio 3.444/1 (31/9), 4.750/1 (38/8), 5.280/1 (37/7), 3.667/1 (33/9), 3.889/1 (35/9), 4.222/1 (38/9), 3.180/1 (35/11) hypoid spiral bevel gear limited slip rear differential
Clutch dry single disk, 216mm diameter
Chassis-body
Type steel monocoque chassis with roll-cage. 2 door coupe steel bodyshell with steel front and rear bumbers. 1980+: plastic front and rear bumbers
Front suspension double wishbones with coil springs, telescopic gas shock absorbers and anti roll bar
Rear suspension live rigid axle with trailing radius arms, transverse linkage bar, coil springs and telescopic gas shock absorbers
Steering system rack and pinion
Brakes front disks: solid 246/253mm diameter with 4 or 2 piston calipers, or ventilated 256/246mm diameter with 4 or 2 piston caliper. Drum rear brakes with 230mm drum diameter, or rear solid disks 246/253mm diameter with 2 piston calipers. 1982+: rear ventilated disks 256mm diameter with 4 piston calipers dual circuit with servo and adjustable ration split front to rear
Dimensions
length: 4.321 m (170.1 in) width: 1.640 m (64.6 in) height: 1.380 m (54.3 in)
wheelbase: 2.518 m (99.1 in) front track: 1.375 m (54.1 in) rear track: 1.375 m (54.1 in)
Rims - tires 6J x 13", 1981+: 6J x 15"
Weight 1000 kg
Weight/power 5.4 kg/HP
Fuel tank 50 or 80 or 100 lt

Results in WRC

Races

Season
Entry Rally event
Driver
Codriver
Team MC SVE
Entry list
KEN POR GRE FIN CAN S.R CdI TdC RAC
Shekhar Mehta
Mike Doughty
cam shaft
Milanini
Agostini
dnf
Rodney Wiltshire
Anne Bertram
?
Xavier Piro
Jean-Pierre Marinot
?
Statistics
Others starts/finishes 4/0 1/0 1/0 2/0

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Information and articles

Article from 4T 180, 9/1985

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Drawings

opel_ascona_b-27753.jpg Source
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