Opel Manta B 400 group B (1983)
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Home » Rally Cars » Opel Manta B 400
img_3872.jpg Source Development level
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: B 237
Years active 1983 - 1986 Homologation start: 1/3/1983
Engine
Type 4S phase 3 with cosworth crossflow cylinderhead, 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 5 of 57.8mm diameter connecting rod length between centers 134mm, big end bearing diameter 55mm
Materials block: cast iron cylinderhead: aluminium
Cams/valves 2 overhead camshafts (DOHC), chain driven to one camshaft, and gear driven from camshaft to camshaft 4 valves/1cyl. - 16 valves total. 38mm inlet valve diameter, 32mm exhaust valve diameter. 10o angle between inlet valve axis and vertical, 10o angle between exhaust valve axis and vertical
Aspiration natural, 2 x Weber DCOE 50 carburettors
Ignition electronic, firing order 1-3-4-2
Cooling system watercooled
Lubrication system dry sump with twin oil coolers 15 lt
Transmission
Type rear wheel drive Getrag 5 speed gearbox
Gearbox ratios 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
constant input: 1.038/1 (27/26)
1st: 2.337/1 (36/16)
2nd: 1.671/1 (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)
Diffrential ratio from 3.170/1 to 5.175/1 ZF hypoid bevel gears, 75% limited slip rear differential
Clutch dry, double disk 229mm diameter
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 wishbones with coil springs, Bilstein telescopic gas shock absorbers and anti-roll bar
Rear suspension live axle with 4 longitudinal links, panhard rod, coil springs and Bilstein telescopic gas shock absorbers. See picture
Steering system rack and pinion 2.7 turns lock to lock
Brakes front ventilated disks 271/279/289mm diameter with 2 or 4 piston callipers, rear ventilated disks 271/277mm diameter with 2 or 4 piston callipers Dual circuit with servo, adjustable ratio split front to rear
Dimensions
length: 4.475 m (176.2") width: 1.687 m (66.4") 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
Weight/power 3.6 kg/HP
Fuel tank 110 lt

Results in WRC

1983 1984 1985 1986 Total
Works
Races /wins 5 2 3 10
Entries/finishes 10/4 3/2 6/5 19/11 (57.9%)
Others
Races/wins +6 +4 11 21
Entries/finishes 4/3 10/6 10/5 24/16 48/30 (62.5%)
Total WRC results
Races/wins 5 7 7 11 31
Entries/finishes 14/7 13/8 16/10 24/16 67/41 (61.2%)
Total points 33 31 20 19 103
(3.323 per race)
(1.537 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
works 4th half shaft 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 10/4 1/0 3/2 2/0 1/1 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
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