Opel Manta B 400 group B (1983)
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Group B
Group A

Story of Opel Manta 400 in Rallying: see video part1, part2, part3, part4, part5.
On board (tarmac): see video

Specifications

See also here

Group/Class B/12 Homologation number: B237
Years active 1983 - 1986 Homologation start: 1/3/1983
Homologation end: 31/12/1989
Engine
Type Opel 4S phase 3, straight 4cyl, 4 stroke, petrol engine located front longitudinal
Capacity 2410 cc WRC: 2410 cc
Bore x Stroke (mm) 95.0 x 85.0
Compression ratio 11.2:1
Output power - torgue 275 HP/ 7200 rpm 30.6 kgm (300 Nm) / 5200 rpm
Main bearings forged steel crankshaft with 5 main bearings, 57.75mm diameter, big end journal diameter 52mm diameter connecting rod length between centers 134mm, big end bearing tunnel diameter 55mm
Materials block: grey cast iron cylinderhead: Cosworth cross flow aluminium alloy with hemispherical combustion chambers
Cams/valves 2 overhead camshafts (DOHC), chain driven to one camshaft, and gear driven from camshaft to camshaft 4 valves/1cyl. - 16 valves total. 35.7mm inlet valve diameter, 30.2mm exhaust valve diameter. 10o angle between inlet valve axis and vertical, 10o angle between exhaust valve axis and vertical. ET: 37/32.5mm in/out valve diameter
Aspiration natural, Bosch L-jetronic electronic multipoint fuel injection, or 2 x Weber 50 DCOE carburetors
Ignition electronic, firing order 1-3-4-2
Cooling system jacketed watercooled with pump, radiator, fan and thermostat
Lubrication system wet sump, or dry sump with twin oil coolers 15 lt
Transmission
Type rear wheel drive Getrag, 5 speed manual gearbox
Gearbox ratios constant input: 1.307/1 (34/26)
1st: 3.822/1 (38/13)
2nd: 2.202/1 (32/19)
3rd: 1.398/1 (31/29)
4th: 1.000/1
5th: 0.872/1 (24/36)
R: 3.705/1 (24/19 x 19/12)		 constant input: 1.038/1 (27/26)
1st: 2.337/1 (36/16)
2nd: 1.681/1 (34/21)
3rd: 1.355/1 (30/23)
4th: 1.163/1 (28/25)
5th: 1.000/1 (direct)
R: 2.650/1 (41/16)		 constant input: 1.652/1 (38/23)
1st: 3.717/1 (36/16)
2nd: 2.403/1 (32/22)
3rd: 1.766/1 (31/29)
4th: 1.263/1 (26/34)
5th: 1.000/1 (direct)
R: 4.230/1
Diffrential ratio 3.18/1 (35/11), 4.75/1 (38/8), 5.17/1 (31/6) ZF hypoid bevel gears, 75% limited slip rear differential
Clutch dry, double disk 229mm diameter, or double plate
Chassis-body
Type steel monocoque chassis. 2 door coupe with integral roll cage and sump guard. Kevlar bonnet, boot lid, front and rear wings with wheel arch extensions, side skirts, doors and rear spoiler
Front suspension double unequal 'A' wishbones with coil springs, Bilstein telescopic gas shock absorbers and anti-roll bar
Rear suspension live axle with 5 longitudinal radius links, panhard rod, coil springs and Bilstein telescopic gas shock absorbers. See picture
Steering system rack and pinion (no servo) 2.7 turns lock to lock, 15.5/1 ratio
Brakes front ventilated disks 271mm diameter with 2 cast iron piston calipers 38/42/54/57mm diameter, or 289mm diameter with 4 aluminium piston callipers 41mm diameter, or 304mm diameter with 4 aluminium piston calipers 42.8mm diameter. Rear solid discs 279mm diameter with 2 cast iron piston calipers 40mm diameter, or solid discs 277mm diameter with 4 aluminium piston calipers 31.75mm diameter, or ventilated disks 279mm diameter with 4 aluminium piston callipers 38.2mm diameter.
1984: front ventilated discs 289mm diameter with 4 aluminium piston calipers 41mm diameter, rear ventilated discs 289mm diameter with 4 aluminium piston calipers 31.75mm diameter		 Dual circuit with vacuum servo, adjustable ratio split front to rear
Dimensions
length: 4.475 m (176.2") width: 1.770 m (69.7") height: 1.320 m (52.0")
wheelbase: 2.518 m (99.1") front track: 1.384 m (54.5") rear track: 1.375 m (54.1")
Rims - tires 5" - 8" x 14" - 15" Michelin TRX 135-250TR290, 195/60VR14, 205/50 R14, 205/50VR15, 225/50VR15
Weight 980 - 1000 kg
Fuel tank 50, 60, 80, 110 lt

Results in WRC

1983 1984 1985 1986 Total
Works
Races /wins 5 2 3 10
Entries/finishes 11/4 3/2 6/5 20/11 (55.0%)
Others
Races/wins +6 +4 11 21
Entries/finishes 4/3 11/7 9/5 27/17 51/32 (62.7%)
Total WRC results
Races/wins 5 7 7 11 31
Entries/finishes 15/7 14/9 15/10 27/17 71/43 (60.6%)
Total points 33 31 20 19 103
(3.323 per race)
(1.451 per entry)

Races

Works team:

  • works: Rothmans Opel Rally Team (1983)
  • works1: Opel Euro Team (1984-1985)
Season
Entry Rally event
Driver
Codriver		 Team M.C (SVE) POR KEN TdC GRE N.Z ARG FIN S.R (CdI) RAC
Ari Vatanen
Terry Harryman
RM16		 works 4th half shaft acci dent head gasket
Henri Toivonen
Fred Gallagher		 works acci dent acci dent 4th engine
Guy Fréquelin
Jean-François Fauchille		 works eng ine
Jimmy McRae
Ian Grindrod		 works 8th 3rd
Dario Cerrato
Giuseppe Cerri		 Conrero 6th
'Lucky'
'Rudy'		 Conrero 8th
Alex Jackson
Julian Cardew		 GM Dealersport 29th
Phil Collins
Stuart Harrold		 GM Dealersport differ ential
Total points
()		 33 10 15 8
Statistics
Works starts/finishes 11/4 1/0 3/2 2/0 2/1 3/1
Others starts/finishes 4/3 2/2 2/1
manta400-004-460x266.jpg Source
2573019308_ae86be2628_o.jpg Source

Article from 4T 180, 9/1985

Click here

8,%20Cut%20away%201982%20400.jpg Source

Drawings

Opel+Manta+400.jpg Source
opel400susp.jpg Source
Rear suspension
  1. Πάνω μπράτσα στήριξης
  2. Σύνδεσμοι μεταλλικοί ή από τεφλόν των πάνω μπράτσων στο σασί και στον άξονα
  3. Κάτω σύνδεσμος μεταλλικός ή από τεφλόν του κάτου μπράτσου με τον άξονα
  4. Σύνδεσμοι μεταλλικοί ή από τεφλόν των κάτω μπράτσων με το σασί
  5. Κάτω μπράτσο
  6. Κάτω μπράτσο
page revision: 76, last edited: 06 Jan 2023 00:29
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