Mazda 323 BF 4WD Turbo group A (1986)
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Home » Rally Cars » Mazda 323 BF 4WD Turbo
mazda-323-bf-rally.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

Also called Mazda Familia BF 4WD Turbo

Specifications

Group/Class A/8 Homologation number: A5286
Years active 1986 - 1990 Homologation start: 1/1/1986
Homologation end: 31/12/1996
Engine
Type Mazda B6T, straight 4cyl, 4 stroke, petrol engine located front transverse vertical
Capacity 1598 cc WRC: x 1.4 = 2237 cc
1988: x 1.7 = 2717 cc
Bore x Stroke (mm) 78.0 x 83.6
Compression ratio 7.2:1
Output power - torgue 240 - 250 HP / 6500 rpm 30.6 kgm (300 Nm) / 4800 rpm
Main bearings cast iron crankshaft with 5 main bearings 54mm diameter connecting rod length between centers 132.9mm, big end bearing tunnel diameter 48mm
Materials block: cast iron 221.3mm deck height cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers, 133.8mm height
Cams/valves 2 overhead camshafts (DOHC), belt driven 4 valves/cyl - 16 valves total. 31mm inlet valve diameter, 26.2mm exhaust valve diameter. 25o angle between inlet valve and vertical, 25o angle between exhaust valve and vertical. 1 coil spring per inlet/exhaust valve
Aspiration 1 x IHI RHB52 (9 blades nickel alloy turbine 43/52.5mm in/out diameter, 10 blades aluminium alloy compressor 36.8/52.5mm in/out diameter) turbocharger, with air/air intercooler, Nippon Denso L-jetronic multipoint electronic fuel injection.
1987: 10 blades nickel alloy turbine 46.5/52.5mm in/out diameter, 10 blades aluminium alloy compressor 39.4/52.5mm in/out diameter
1990-1991: 40mm turbo restrictor fitted.
1992-1994: 38mm turbo restrictor fitted.
1995+: 34mm turbo restrictor fitted.
pressure 0.9 - 1.1 bar
Ignition electronic, firing order 1-3-4-2
Cooling system watercooled 6 lt
Lubrication system wet sump with oil cooler 3.6 lt
Transmission
Type 4 wheel drive 5 speed manual gearbox. 1988+: X-trak 6 speed manual gearbox
Gearbox ratios 1st: 3.307/1 (43/13)
2nd: 1.833/1 (33/18)
3rd: 1.233/1 (37/30)
4th: 0.970/1 (33/34)
5th: 0.795/1 (35/44)
R: 3.166/1 (38/27 x 27/12)
1st: 3.000/1 (42/14)
2nd: 2.058/1 (35/17)
3rd: 1.565/1 (36/23)
4th: 1.344/1 (39/29)
5th: 1.078/1 (41/38)
R: 3.166/1 (38/27 x 27/12)
1988+: 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)
Diffrential ratio Front: 4.105/1 (78/19), 4.388/1 (79/18), 4.411/1 (75/17).
1987: 4.055/1 (73/18), 3.429 (48/14), 3.500/1 (49/14 or 56/16), 3.929/1 (55/14), 4.000/1 (56/14), 4.071/1 (57/14), 3.667/1 (55/15), 3.733/1 (56/15), 3.800/1 (57/15), 3.867/1 (58/15), 3.375/1 (54/16), 3.437/1 (55/16).
Center differential & transfer box: 0.255/1 (37/43 x 11/37)
1987: 0.256/1 (37/39 x 10/37)
Rear differential: 3.909/1 (43/11).
1987: 3.900/1 (39/10)
Helical gear epicyclical center differential. One side 1st output to internal casing of open front differential. Other side 2nd output to a helical idler gear, connected to transfer box. Bevel gear transfer box to, hypoid straight bevel gear, limited slip 75% rear differential. Locked 100% center differential. From Monte Carlo '89: adjustable
Clutch dry single disk, 225mm diameter
Chassis-body
Type steel monocoque Mazda BF MR chassis with roll-cage. 3 door hatchback steel bodyshell with steel doors and bonnet, plastic front and rear bumbers
Front suspension Mac pherson strut with lower 'L' steel or aluminium wishbone, coil springs, bilstein telescopic gas shock absorbers and anti-roll bar. (See picture)
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. (See picture)
Steering system rack and pinion with hydraulic power assistance 3.0 turns lock to lock, 22.1/1 or 13/1 ratio. 1987: 14.5/1, 15.4/1 ratio
Brakes Front ventilated disks with 260mm disk diameter and 1 cast iron piston caliper 50.8mm diameter. Rear solid discs with 247mm disk diameter and 1 cast iron piston caliper 30.2mm diameter. Front/rear ventilated discs 276mm disk diameter and 4 aluminium piston calipers 36.1/38/41.4mm diameter. 1987: front/rear ventilated discs 276mm diameter with 4 aluminium piston calipers 42.8mm diameter and rear 4 aluminium piston calipers 34mm diameter. Rear brake disc or caliper protection fitted
1988: front/rear ventilated discs 295mm diameter with 4 aluminium piston calipers 38.1+41.3mm diameter (1 piston pair 38.1mm+1 piston pair 41.3mm).
1989: rear 4 aluminium piston calipers 31.75mm diameter.
1990: front/rear ventilated discs 304mm diameter
dual circuit with Jidoshakiki vacuum servo, adjustable ratio split front to rear
Dimensions
length: 3.990 m (157.1") width: 1.645 m (64.8") height: 1.385 m (54.5")
wheelbase: 2.400 m (94.5") front track: 1.400 m (55.1") rear track: 1.425 m (56.1")
Rims - tires 14", 5.5 or 6.5 or 7.5 x 15" Michelin L5
Weight 1050 - 1120 kg 50% - 50% front to rear distribution
Weight/power 4.4 kg/HP
Fuel tank 50-70 t
Drag coefficient 0.36

Results in WRC

Statistics

1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 Total
Works
Races/wins 4/(1) 5/1 6 5/2 4 24/3(+1)
Entries/finishes 5/1 9/3 13/4 10/8 8/5 45/21 (46.7%)
Others
Races/wins +2/(1) +4 +2 +2 +3 4 2 4 2 3 2 30/(1)
Entries/finishes 3/3 25/4 24/5 36/10 14/5 9/2 2/2 7/4 5/1 5/2 3/2 133/41 (30.4%)
Total WRC results
Races/wins 6/(2) 9/1 8 7/2 7 4 2 4 2 3 2 54/3(+2)
Entries/finishes 8/4 34/7 37/9 46/18 22/10 9/2 2/2 7/4 5/1 5/2 3/2 178/62 (34.4%)
Total points 6 43 41 58 28 176
(3.259 per race)
(0.989 per entry)

Races

Works team: Mazda Rally Team Europe

Season

Group A classification is noted in brackets
Entry Rally event
Driver
Codriver
Team MC SVE
Entry list
POR KEN TdC GRE NZ ARG FIN (CdI) SR RAC (Oly)
Ingvar Carlsson
Per Carlsson
works gear box elec trical eng ine 10th (1st)
Achim Warmbold
'Biche'
works eng ine
Rod Millen
John Bellefleur
CRC / Mazda 10th (2nd) 7th (1st)
Neil Allport
Rodger Freeth
11th (4th)
Total points
()
6 1 1 4
Statistics
Works starts/finishes 5/1 2/0 1/0 1/0 1/1
Others starts/finishes 3/3 1/1 2/2

0707_z+1988_mazda_323_gtx+rally_car.jpg Source
Timo Salonen in RAC rally 1988

Information and articles

Article from Auto Express (Greece) 240, 7/1987

Click here

ebc726e3.jpg Source
Cylinderhead of Β6Τ engine

Drawings

Suspension

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