Mazda 323 BG8 GTR group A (1993)
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Home » Rally Cars » Mazda 323 BG8 GTX
sx0.jpg 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 GTR

Specifications

Click here for street version
Group/Class A/8 Homologation number: A 5473
Years active 1993 Homologation start: 1/1/1993
Homologation end: 31/12/2000
Engine
Type BPD, straight 4cyl, 4 stroke located front transverse
Capacity 1839.6 cc WRC: WRC: x 1.7 = 3127.5 cc
Bore x Stroke (mm) 83.0 x 85.0
Compression ratio 7.2:1
Output power - torgue 290 - 300 HP / 7000 rpm 43.0 kgm (422 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 camshafts (DOHC), belt driven 4 valves/cyl. - 16 valves total. 33.1mm inlet valves diameter, 28.2mm exhaust valves diameter. 25o angle between inlet valve and vertical, 25o angle between exhaust valve and vertical. Sodium filled exhaust valves
Aspiration IHI RHF6 VJ23 watercooled turbocharger (cast iron turbine 62mm diameter, aluminium compressor 65mm diameter), with 38mm turbo restrictor fitted. Nippon Denso L-jetronic multipoint electronic fuel injection.
1995+: 34mm turbo restrictor fitted.
pressure: 1.2 bar
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 G25MX-R 5 speed or X-trak 6 speed
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: 3.000/1 (36/12)
2nd: 2.267/1 (34/15)
3rd: 1.824/1 (31/17)
4th: 1.526/1 (29/19)
5th: 1.333/1 (28/21)
6th: 1.182/1 (26/22)
R: 3.000/1 (42/16 x 16/14)
1st: 3.692/1 (48/13)
2nd: 2.800/1 (42/15)
3rd: 2.167/1 (39/18)
4th: 1.714/1 (36/21)
5th: 1.409/1 (31/22)
6th: 1.178/1 (33/28)
R: 3.000/1 (42/16 x 16/14)
Diffrential ratio Center: 4.214/1 (59/14), 4.545/1 (50/11), 4.167/1 (50/12), 4.083/1 (49/12), 4.071 (57/14), 3.769/1 (49/13), 3.750/1 (45/12), 3.733/1 (56/15), 3.692/1 (48/13), 3.438/1 (55/16), 3.429/1 (48/14), 3.357/1 (47/14), 3.176/1 (54/17), 2.944/1 (53/18),
Transfer box
Type A: 0.255/1 (37/43 x 11/37)
Type B: 0.256/1 (37/39 x 10/37)
Type C: 0.257/1 (37/35 x 9/37)
Type D: 0.281/1 (37/32 x 9/37)

Rear differential
Type A: 3.429/1 (43/11)
Type B: 3.900/1 (39/10)
Type C: 3.889/1 (35/9)
Type D: 3.556/1 (32/9)
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. Front and rear steel subframes for suspension support. 3 door hatchback steel bodyshell with polyurethane bumbers
Front suspension Mac pherson strut with lower L wishbone, coil springs, bilstein telescopic gas shock absorbers and anti-roll bar 20 to 35mm diameter
Rear suspension Mac pherson strut with Twin-Trapezoidal Link (TTL): two transverse and one longtitudinal lower arms. Steel connections, coil springs, telescopic gas shock absorbers and anti-roll bar 12 to 26mm diameter
Steering system rack and pinion with hydraulic power assistance 2.6 turns lock to lock
Brakes ventilated front disks with 274mm disk diameter and 1 cast iron piston caliper, or 276/295/304/315/330mm disk diameter and 4 aluminium piston calipers.
Solid rear disks with 280mm disk diameter and 1 cast iron piston caliper, or ventilated rear disks with 276/295/304/315/330mm disk diameter and 4 aluminium piston calipers
dual circuit with servo and adjustable ratio split front to rear
Dimensions
length: 4.080 m (160.6") width: 1.695 m (66.7") height: 1.390 m (54.7")
wheelbase: 2.450 m (96.5") front track: 1.445 m (56.9") rear track: 1.435 m (56.5")
Rims - tires 5.5" or 6.5" or 7.5" x 15" (gravel), 16" (tarmac) Michelin, 195/50R15
Weight 1100 kg 51% - 49% front/rear distribution
Weight/power 3.7 kg/HP
Fuel tank 60 lt
Drag coefficient 0.39

Results in WRC

Statistics

1993 1994 1995 1996 1997 1998 1999 2000 Total
Total WRC results
Races/wins 2 3 6 2 6 3 2 1 24
Entries/finishes 3/2 4/1 6/4 2/1 6/2 4/2 3/1 1/0 29/13 (44.8%)
Total points 9 9 18
(0.750 per race)
(0.621 per entry)

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
Björn Johansson
Anders Olsson
Q8 Team Mazda Dealer 5th
Hakan Eriksson
Jan Svanström
Wessman Rally Sport eng ine
Neil Allport
Jim Robb
8th
Total points
()
9 6 3
Statistics
Starts/finishes 3/2 2/1 1/1

323gtr1992.jpg Source

Information and articles

Article from 4T 261, 6/1992

Click here

Drawings

mazda_323_gtr-19407.jpg Source

Ssuspension

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