Opel Ascona B 2.0 group 2 (1978)
 Source |
Development chain 1971: Opel Ascona A SR 1978: Opel Ascona B 2.0 |
Development level Group 4 Group 2 |
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Table of Contents
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Specifications
Click here| Group/Class | 2/3 or A/7 | Homologation number: 5612 (02/01F), A5053 (20S), A5067 (i2000), and A5068 (20E) | |||
| Years active | 1978-1985 | Homologation start: 1/8/1978, 1/7/1982 and 1/10/1982 Homologation end: group 2: 31/12/1981, group A: 31/12/1986 |
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| Engine | |||||
|---|---|---|---|---|---|
| Type | Opel CIH 20E, straight 4 cyl, 4 stroke, petrol engine. 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 | heat treated steel crankshaft with 5 main bearings 58mm diameter, 52mm big end journal diameter | connecting rod length between centers 128mm, big end bearing tunnel diameter 55mm, small end bearing diameter 22mm, BE/SE bearings width 24,8mm, 3/8" bolts. Aluminium alloy pistons with 45mm compression height and 22mm piston pin diameter | |||
| Materials | block: grey cast iron, 208mm deck height | cylinderhead: reverse flow cast iron with "wedge" shape combustion chambers | |||
| Cams/valves | single overhead camshaft (SOHC) located between valves (not above), also called cam in head (CIH), chain driven. Operation with rocker arms and cam followers | 2 valves/cyl. - 8 valves total. 42mm inlet valve diameter, 37mm exhaust valve diameter. 25o angle between inlet/exhaust valves axis and vertical (inlet and exhaust valves are parallel) | |||
| Aspiration | natural, 1 x GM Strasburg Varajet II twin carburetor, or 1 x Zenith 35/40 INAT twin carburetor, i2000: 2 x Solex 45 ADDHE twin carburetors, 20E: Bosch L-jetronic electronic multipoint fuel injection |
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| Ignition | electronic, firing order 1-3-4-2 | ||||
| Cooling system | jacketed watercooled with pump, radiator, fan and thermostat | 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 front suspension reverse "pi"-shaped subframe bridge and roll-cage. 2 door coupe steel bodyshell with steel front and rear bumpers. 1980+: plastic front and rear bumpers | ||||
| Front suspension | double unequal 'A' wishbones with coil springs, telescopic gas shock absorbers and anti roll bar | ||||
| Rear suspension | live axle with 2 longitudinal trailing radius arms, transverse linkage bar, coil springs and telescopic gas shock absorbers | ||||
| Steering system | rack and pinion (no servo) | 17.5/1 ορ 15.5/1 ratio | |||
| Brakes | front solid or ventilated discs 246mm diameter with 2 steel piston calipers 48mm diameter, or ventilated discs 246mm diameter with 2 steel piston calipers 42mm diameter, or ventilated discs 256mm diameter with 4 aluminium piston calipers 37.5mm diameter. Rear drum brakes with 230mm drum diameter with 1 double piston caliper 16/19.05/22mm diameter, or solid disks 253mm diameter with 2 aluminium piston calipers 44.5mm diameter. 1984: rear solid discs 254mm diameter with 2 cast iron piston calipers 33mm diameter | dual circuit with vacuum servo, and adjustable ratio 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 | ||||
| Fuel tank | 50, 60, 80 or 100 lt | ||||
Results in WRC
Races
Works team: Opel Eurohandler Team
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 |
works | cam shaft | ||||||||||||||
| Statistics | ||||||||||||||||
| Others starts/finishes | 1/0 | 1/0 | ||||||||||||||
Information and articles
Article from 4T 180, 9/1985
Click here
Drawings
Source
page revision: 243, last edited: 14 Nov 2019 19:43