Mazda 323 BG8 GTX group A (1990)
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Home » Rally Cars » Mazda 323 BG GTX
s-l225.jpg Source Development chain
1982: Mazda 323 BD GT
1984: Mazda 323 BD Turbo
1986: Mazda 323 BF 4WD Turbo
1990: Mazda 323 BG8 GTX
1993: Mazda 323 BG8 GTR
Development level
Group A
Group N
Production

Also called Mazda Familia BG8 GTX

Specifications

Group/Class A/8 Homologation number: A 5415
Years active 1990 - 1991 Homologation start: 1/8/1990
Homologation end: 31/12/2000
Engine
Type BPT straight 4cyl, 4 stroke located front transverse
Capacity 1839.6 cc WRC: x 1.7 = 3127.3 cc
Bore x Stroke (mm) 83.0 x 85.0
Compression ratio 7.2:1
Output power - torgue 280 HP / 7000 rpm 38.0 kgm (373 Nm) / 5500 rpm
Main bearings 5 of 54mm diameter connecting rod length between centers 132.9mm, big end bearing diameter 48mm
Materials block: cast iron 221mm height cylinderhead: aluminium alloy 133mm height
Cams/valves 2 overhead camshaft (DOHC), belt driven 4 valves/cyl. - 16 valves total. 33mm inlet valves diameter, 28mm exhaust valves diameter. 25o angle between inlet valves and vertical, 25o angle between exhaust valves and vertical. 1 coil spring per inlet/exhaust valve. Sodium filled exhaust valves
Aspiration IHI RHB5 VJ20 turbocharger (cast iron turbine 52.5mm diameter, aluminium compressor 52.5mm diameter), Nippon Denso L-jetronic multipoint electronic fuel injection. 40mm turbo restrictor fitted. Variable Inertia Charging System (VICS) solenoid valve fitted occasionally.
1992-1994: 38mm turbo restrictor fitted.
pressure:
Ignition electronic, firing order 1-3-4-2
Cooling system watercooled 6 lt
Lubrication system wet sump with 1 oil cooler 4 lt
Transmission
Type 4 wheel drive 5 speed or X-trak 6 speed manual
Gearbox ratios 1st: 3.454/1 (38/11)
2nd: 1.833/1 (33/18)
3rd: 1.310/1 (38/29)
4th: 0.970/1 (33/34)
5th: 0.717/1 (33/46)
R: 3.166/1 (38/27 x 27/12)
1st: 3.692/1 (48/13)
2nd: 2.812/1 (45/16)
3rd: 2.210/1 (42/19)
4th: 1.772/1 (39/22)
5th: 1.440/1 (36/25)
6th: 1.178/1 (33/28)
R: 3.000/1 (42/16 x 16/14)
1992+: 1st: 3.692/1 (48/13)
2nd: 2.563/1 (41/16)
3rd: 1.944/1 (35/18)
4th: 1.545/1 (34/22)
5th: 1.333/1 (32/24)
6th: 1.178/1 (33/28)
R: 3.000/1 (42/16 x 16/14)
Diffrential ratio Center: 4.214/1 (59/14), 4.071/1 (57/14), 3.769/1 (49/13), 3.733/1 (56/15), 3.429 (48/14).
Transfer box:
Type A: 0.255/1 (37/43 x 11/37)
Type B: 0.256/1 (37/39 x 10/37)
Rear differential:
Type A: 3.909/1 (43/11)
Type B: 3.900/1 (39/10)
Helical gear epicyclical center differential with viscous coupling, one side 1st output to internal casing of limited slip front differential. Other side 2nd output to a helical spur idler gear, connected to transfer box. Bevel gear transfer box to, hypoid straight bevel gear, viscous limited slip rear differential. Adjustable center differential 36% - 44% or 46% - 54% front - rear torque distribution
Clutch dry, single disk 230mm diameter
Chassis-body
Type steel monocoque BG8 chassis of Ford CT120 platform, with roll-cage. 3 door hatchback steel bodyshell with polypropylene bumbers
Front suspension Mac pherson strut with lower L wishbone, coil springs, bilstein telescopic gas shock absorbers, anti-roll bar of 12.7 to 25.4mm diameter
Rear suspension Mac pherson strut with Twin-Trapezoidal Link (TTL): two transverse and one longtitudinal lower links. Steel connections, coil springs, telescopic gas shock absorbers and anti-roll bar of 12.7 to 25.4mm diameter
Steering system rack and pinion with hydraulic power assistance 3.0 turns lock to lock
Brakes ventilated front disks with 257mm disk diameter and 1 cast iron piston caliper, or 276/295/304mm disk diameter and 4 aluminium piston calipers. Solid rear disks with 250mm disk diameter and 1 cast iron piston caliper, or ventilated rear disks with 276/295/304mm disk diameter and 4 aluminium piston calipers dual circuit with servo, adjustable ratio split front to rear
Dimensions
length: 4.035 m (158.9") width: 1.675 m (65.9") height: 1.390 m (54.7")
wheelbase: 2.450 m (96.5") front track: 1.430 m (56.3") rear track: 1.435 m (56.5")
Rims - tires 5.5" or 6.5" or 7.5" x 15" (gravel), 16" (tarmac) Michelin
Weight 1100 kg 51% - 49% front to rear distribution
Weight/power 4.0 kg/HP
Fuel tank 55-60 lt
Drag coefficient Cd 0.39

Results in WRC

Statistics

1990 1991 1992 1993 1994 Total
Works
Races 2 8 10
Entries/finishes 4/1 13/7 17/8 (47.1%)
Others
Races 3 1 4
Entries/finishes 2/0 6/6 4/1 1/1 13/8 (61.5%)
Total WRC results
Races 2 8 3 1 14
Entries/finishes 6/1 19/13 4/1 1/1 30/16 (53.3%)
Total points 5 52 4 61
(4.357 per race)
(2.033 per entry)

Races

Works team: Mazda Rally Team Europe

Season
Entry Rally event
Driver
Codriver
Team M.C
Entry list
POR KEN TdC GRE (N.Z) ARG FIN AUS S.R (CdI) RAC
Timo Salonen
Seppo Harjanne
works 6th accident
Hannu Mikkola
Christian Geistdörfer
works engine engine
Mikael Sundström
Juha Repo
Mazda Rally Team Finland turbo head gasket
Total points
()
5 5
Statistics
Works starts/finishes 4/1 2/1 2/0
Private starts/finishes 2/0 1/0 1/0

153734678-M.jpg Source

Drawings

Suspension

323frontsusp.gif Source
Front suspension
323rearsusp.gif Source
Rear suspension
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