Opel Manta B GTE group A (1978)
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Development chain 1971: Opel Manta A 1978: Opel Manta B GTE 1991: Opel Calibra 16V 1993: Opel Calibra Turbo 4x4 |
Development level Group B Group A |
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Table of Contents
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1983: Opel Manta B2 20E, Opel Manta B2 GSi
Specifications
Service manual| Group/Class | A/7 | Homologation number: 5686 and A5146 (Manta B2 GTE) | |
| Years active | 1983 | Homologation start: 1/1/1978 and 1/6/1983 Homologation end: 31/12/1993 |
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| Engine | |||
|---|---|---|---|
| Type | GM Opel CIH 19E and 20E (extension 3/1E of 1/8/1978), straight 4 cyl, 4 stroke, petrol engine | located front longitudinal vertical | |
| Capacity | 19E: 1897cc, 20E: 1979 cc | WRC: 19E: 1897cc, 20E: 1979 cc | |
| Bore x Stroke (mm) | 19E: 93.0 x 69.8, 20E: 95.0 x 69.8 | ||
| Compression ratio | 19E: 9.6:1, 20E: 9.8:1, 11.5:1 | ||
| Output power - torgue | 185 HP / 7100 rpm | 21.4 kgm (210 Nm) / 5500 rpm | |
| Main bearings | forged steel crankshaft with 5 main bearings 58mm diameter, 52mm big end journals 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: cast iron | cylinderhead: reverse flow cast iron head 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, 19E: 34mm 20E: 37mm exhaust valve diameter. 25o angle between inlet/exhaust valves axis and vertical (inlet and exhaust valves are parallel) | |
| Aspiration | natural, Bosch L-jetronic electronic multipoint fuel injection. Click here and here and here | ||
| Ignition | electronic, firing order 1-3-4-2 | ||
| Cooling system | jacketed watercooled with pump, radiator, fan (5 blades 360mm diameter) and thermostat | 6.8 lt | |
| Lubrication system | wet sump | 4.1 lt | |
| Transmission | |||
| Type | rear wheel drive | Getrag 240 or Getrag 265, 4 or 5 speed manual gearbox | |
| Gearbox ratios | 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) |
constant input: 1.038/1 (36/19) 1st: 2.337/1 (36/16) 2nd: 1.682/1 (34/21) 3rd: 1.355/1 (30/23) 4th: 1.263/1 (28/25) 5th: 1.000/1 R: 2.661 (41/16) |
10/1983+, constant input: 1.269/1 (33/26) 1st: 3.717/1 (41/14) 2nd: 2.019/1 (35/22) 3rd: 1.316/1 (28/27) 4th: 1.000/1 5th: 0.804/1 (26/41) R: 3.445 (24/14 x 38/24) |
| Diffrential ratio | 3.444/1 (31/9), 4.222/1 (38/9). Group 2 only: 3.182/1 (35/11), 3.667/1 (33/9), 3.889/1 (35/9), 4.750/1 (38/8), 5.280/1 (37/7) |
hypoid spiral bevel gear limited slip rear differential | |
| Clutch | dry single disc, 19E: 204mm diameter. 20E: 216mm diameter | ||
| Chassis-body | |||
| Type | steel monocoque Opel Manta B chassis with front transverse sub-frame and roll-cage. 1984: 25kg AlZnMg1 aluminium alloy (D40x3.5mm) roll cage. 2 door coupe steel bodyshell with steel doors, steel front/rear bonnets, steel front rear bumpers. 1983: B2 chassis, with plastic front/rear bumpers, plastic front, rear airofoils, and plastic side skirts | ||
| Front suspension | double "A" unequal wishbones with coil springs, telescopic gas shock absorbers and anti roll bar | ||
| Rear suspension | live rigid axle with 2 lower trailing radius arms, 2 upper trailing radius links, transverse linkage bar, coil springs, telescopic gas shock absorbers and stabiliser bar | ||
| Steering system | rack and pinion (no servo) | 15/1 ratio | |
| Brakes | Front solid discs 246/254mm diameter with 2 piston calipers 48mm diameter. Rear drum brakes 230mm diameter with 1 double piston caliper 19.05mm diameter. 1983: front ventilated discs 256mm diameter with 4 aluminium piston calipers 37.5mm diameter, or solid discs 253mm diameter with 2 aluminium piston calipers 44.5mm diameter or ventilated discs 246mm diameter with 2 cast iron piston calipers 42/48mm diameter. 1984: rear solid discs 254mm diameter with 2 cast iron piston calipers 33mm diameter. 1985: front ventilated discs 271mm diameter with 2 cast iron piston calipers 54mm diameter, rear solid discs 279mm diameter with 2 cast iron piston calipers 40mm diameter |
dual circuit with vacuum servo and adjustable ration split front to rear | |
| Dimensions | |||
| length: 4.444 m (175.0") | width: 1.648 m (64.9"), 1983: 1.656 m (65.2") | height: 1.325 m (52.1") | |
| wheelbase: 2.518 m (99.1") | front track: 1.375 m (54.1") | rear track: 1.375 m (54.1") | |
| Rims - tires | speedline, 6 x 13", 14" or 15" | ||
| Weight | 925-1000 kg | ||
| Weight/power | 5.4 kg/HP | ||
| Fuel tank | 50 lt, Group 2: 100 lt | ||
1978 GTE gearbox
| constant input: 1.167/1 (21/18) 1st: 2.87/1 (32/13) 2nd: 1.75/1 (24/16) 3rd: 1.29/1 (21/19) 4th: 1.000/1 R: 2.69/1 (30/18 x 18/13) |
constant input: 1.438/1 (23/16) 1st: 3.43/1 (31/13) 2nd: 2.16/1 (24/16) 3rd: 1.37/1 (19/20) 4th: 1.000/1 R: 3.32/1 (30/18 x 18/13) |
Results in WRC
Races
2.0 lt engines
SourceJuha Kankunnen at 1000 Lakes '82 with '78 GTE
SourceGavin Cox at RAC '83
Source
Source
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SourcePerformance diagram of Manta B GTE 1.9
Drawings
Source
Gearbox
Source
Rear suspension
Source
page revision: 297, last edited: 15 Nov 2019 12:08