Austin MG Metro Turbo group A (1983)
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Home » Rally Cars » Austin MG Metro Turbo
sx1.jpg Development level
Group B
Group A
Production

Specifications

Group/Class A/7 (1983-1987),
A/8 (1988+)
Homologation number: A 5107
Years active Homologation start: 1/2/1983
Engine
Type A+ series, code 12HD26, straight 4cyl, 4 stroke located front transverse
Capacity 1275 cc WRC: x1.4 = 1785 cc (1983-1987)
x 1.7 = 2168 cc (1988+)
Bore x Stroke (mm) 70.6 x 81.33
Compression ratio 9.4:1
Output power - torgue 170 - 190 HP / 7200 rpm
Main bearings 3 of 50.8mm diameter connecting rod length between centers 152.4mm. Big end bearing: 45mm diameter x 26.9mm width. Gudgeon pin 20.6mm diameter
Materials block: cast iron 12G940 cylinderhead: cast iron
Cams/valves overhead valves (OHV), side camshaft, chain driven 2 valves/cyl. - 8 valves total. 35.71mm inlet valve diameter, 29.38mm exhaust valve diameter. 0o angle between inlet and exhaust valve axis and vertical. 2 homocentric coil spring per inlet and exhaust valve
Aspiration Garret Airesearch T3 turbocharger, SU HIF44 carburator pressure: 1.1 bar
Ignition electronic, firing order 1-3-4-2
Cooling system watercooled 4.9 lt
Lubrication system dry sump 4.8 lt
Transmission
Type front wheel drive 4 speed gearbox
Gearbox ratios 1st: 3.647/1
2nd: 2.185/1
3rd: 1.425/1
4th: 1.000/1
R: 3.667/1
1st: 2.313/1
2nd: 1.567/1
3rd: 1.194/1 or 1.187/1
4th: 1.000/1
Diffrential ratio 3.610/1 or 3.210/1 helical gears limited slip 80% front differential
Clutch dry single disk, 181mm diameter
Chassis-body
Type steel monocoque with roll-cage. 3 door hatchback bodyshell
Front suspension bottom link braced by anti roll bar, top link operating Hydragas spring and telescopic gas shock absorbers
Rear suspension trailing arm with coil spring, telescopic gas shock absorbers and adjustable anti roll bar
Steering system rack and pinion 2.25 turns lock to lock
Brakes front: ventilated disks with four piston calipers
back: solid disks with two piston calipers
adjustable ratio split front to rear
Dimensions
length: 3.403 m (134.0") width: 1.563 m (61.5") height: 1.378 m (54.3")
wheelbase: 2.251 m (88.6") front track: 1.312 m (51.6") rear track: 1.286 m (50.6")
Rims - tires front: 7 1/2" x 13" or 15"
back: 8" x 13" or 15"
Weight 860 kg
Weight/power 5 kg/HP
Fuel tank 60 lt
Drag coefficient 0.39

Results in WRC

Statistics

1987 Total
Total WRC results
Races 1 1
Entries/finishes 1/0 1/0 (0%)

Races

Season
Entry Rally event
Driver
Codriver
Team MC SVE
Entry list
POR KEN TdC GRE Oly (NZ) ARG FIN (CdI) SR RAC
J. Margaronis
C. Zikos
dnf
Statistics
Others starts/finishes 1/0 1/0

carlisle-6.jpg Source

Information and drawings

Article from 4Τ 199, 4/1987

Click here
mg-metro-engine-block.jpg Source

Drawings

Engine

A+ engine 1275cc without turbo
engineaseries_02.jpg Source
aseries4.jpg Source

Turbo

1300turbodiagram.jpg Source

Transmission

gearbox1.jpg Source
mg-metro-front-brake.jpg Source
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