Opel Calibra Turbo 4x4 group A (1993)
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Home » Rally Cars » Opel Calibra Turbo 4x4
Stig1.jpg Source Development chain
1983: Opel Manta B 20E
1991: Opel Calibra 16V
1993: Opel Calibra Turbo 4x4
Development level
Group A
Group N
Production

Specifications

Group/Class A/8 Homologation number: A 5477
Years active 1993 Homologation start: 1/1/1993
Homologation end: 31/12/2004
Engine
Type GM Family II C20LET, straight 4cyl, 4 stroke, petrol engine located front transverse with 7.5o front inclination
Capacity 1998 cc WRC: x 1.7 = 3397 cc
Bore x Stroke (mm) 86.0 x 86.0
Compression ratio 8.0:1
Output power - torgue 280 HP / 6500 rpm 40.8 kgm (400 Nm) / 4500 rpm
Main bearings 5 of 58mm diameter connecting rod length 143mm, big end bearing internal diameter 52.6mm
Materials block: cast iron, 271mm height cylinderhead: aluminium alloy, 135.5mm height
Cams/valves 2 overhead camshafts (DOHC), belt driven 4 valves/cyl. - 16 valves total. 33.1mm inlet valves diameter, sodium filled exhaust valves 29.1mm diameter. 23o angle between inlet valves and vertical, 23o angle between exhaust valves and vertical. 1 coil spring per valve
Aspiration KKK K16 turbocharger (inconel turbine 55.2mm diameter, aluminium compressor 60.9mm diameter) with air/air intercooler and 38mm turbo restrictor, Bosch Motronic M2.7 electronic fuel injection
1995+: 34mm turbo restrictor fitted
pressure:
Ignition electronic 12v 55Ah battery, 70A alternator, 1.4kW starter motor
Cooling system watercooled 7.5 lt
Lubrication system wet sump with 1 oil cooler 4.5 lt
Transmission
Type four wheel drive X-trac 6 speed manual gearbox. 1994+: X-trac 6 speed sequential gearbox
Gearbox ratios 1st: 3.571/1 (50/14)
2nd: 2.160/1 (54/25)
3rd: 1.455/1 (48/33)
4th: 1.103/1 (43/39)
5th: 0.886/1 (31/35)
6th: 0.735/1 (36/49)
R: 3.321/1 (42/14 x 31/28)
1st: 3.417/1 (41/12)
2nd: 2.500/1 (35/14)
3rd: 1.941/1 (33/17)
4th: 1.550/1 (31/20)
5th: 1.304/1 (30/23)
6th: 1.087/1 (25/23)
R: 2.692/1 (15/13 x 35/15)
1st: 3.077/1 (40/13)
2nd: 2.333/1 (35/15)
3rd: 1.824/1 (31/17)
4th: 1.476/1 (31/21)
5th: 1.261/1 (29/23)
6th: 1.037/1 (28/27)
R: 2.692/1 (15/13 x 35/15)
Diffrential ratio Front: 3.722/1 (67/18), 2.550/1 (51/20), 2.650/1 (53/20), 2.737/1 (52/19), 2.842/1 (54/19), 2.944/1 (53/18), 3.055/1 (55/18), 3.176/1 (54/17), 3.273/1 (36/11), 3.294/1 (56/17), 3.737/1 (71/19), 3.769/1 (49/13), 3.846/1 (50/13), 3.867/1 (58/15), 3.944/1 (71/18), 4.000/1 (48/12), 4.071/1 (57/14), 4.083/1 (49/12), 4.167/1 (50/12), 4.188/1 (67/16), 4.200/1 (63/15), 4.214/1 (59/14), 4.500/1 (63/14), 4.545/1 (50/11), 4.667/1 (56/12), 4.786/1 (67/14), 4.846/1 (63/13), 4.923/1 (64/13), 5.000/1 (55/11), 5.091/1 (56/11), 5.182/1 (57/11),
Transfer box: 0.730/1 (27/37).
Planetary gears: 65/23/16.
Rear: 3.700/1 (37/10)
helical gear input from gearbox to limited slip front differential with output to transfer box through hollow shaft. Spiral bevel gears transfer box with viscous coupling epicyclical center differential (65/23/16). Hypoid spiral bevel gears limited slip rear differential
Clutch dry single disk, 228mm diameter
Chassis-body
Type steel monocoque chassis of GM2900 platform with roll-cage and front suspension steel sub-frame. 3 door coupe steel bodyshell with plastic bumpers
Front suspension macpherson strut with lower L wishbone, coil spring, telescopic gas shock absorber and anti-roll bar
Rear suspension trailing/semi-trailing arm with coil spring, telescopic gas shock absorber and anti-roll bar
Steering system rack and pinion with hydraulic power assistance 14.8/1, 17.1/1, 22/1
Brakes front ventilated disks 284mm diameter with 1 cast iron piston caliper, or 310/325/330/355mm diameter and 4/6 aluminium piston calipers. Rear solid disks 270mm diameter with 1 cast iron piston caliper, or ventilated disks 295mm diameter with 4 aluminium piston calipers dual circuit with 229mm diameter servo, adjustable ratio split front to rear
Dimensions
length: 4.492 m (176.9 in) width: 1.688 m (66.5 in) height: 1.320 m (52.0 in)
wheelbase: 2.600 m (102.4 in) front track: 1.426 m (56.1 in) rear track: 1.446 m (56.9 in)
Rims - tires 6 x 16" - 17" 205/60/ZR 16
Weight 1200kg
Weight/power 4.3 kg/HP
Fuel tank 63 - 68 lt
Drag coefficient 0.29

Results in WRC

Statistics

1993 1994 1995 1996 1997 1998 Total
Total WRC results
Races 2 1 1 4
Entries/finishes 2/0 1/0 1/1 4/1 (25%)

Races

Works team: -

Season
Entry Rally event
Driver
Codriver
Team M.C SVE POR KEN T.dC GRE ARG N.Z FIN AUS S.R ESP RAC
Stig Blomqvist
Benny Melander
Opel Team Sweden eng ine
Erwin Doctor
Theo Badenberg
Opel Dealer Team Holland oil pump
Statistics
Starts/finishes 2/0 1/0 1/0

Saxony_rally_racing_Opel_Calibra_4x4_Turbo_64_(aka).jpg Source
Stig1.jpg Source
Stig Blomqvist in Swedish rally '93
1995_WRC_MonteCarlo_Opel_cb.jpg Source
1995+20+205.jpg Source
Henrik Lundgaard/Freddy Pedersen in Monte Carlo '95
Stig2.jpg Source
opel-calibra-4x4-rear-axle.jpg Source
Rear axle
transfer-box-4x4-calibra-vectra-turbo-slika-3738100.jpg Source
Transmission

Drawings

Click here for 3d model

Transmission

4x4.jpg
opel-vectra_x.jpg Source
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