Mazda 323 BF 4WD Turbo group A (1986)
 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
Click here and here for production| 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 | 7.9:1, 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, big end journals diameter 45mm | connecting rod length between centers 132.9mm, big end bearing tunnel diameter 48mm. Aluminium alloy piston with 31.8mm compression height | |
| 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 0.65 bar (production), or 0.9 - 1.1 bar | |
| Ignition | electronic, firing order 1-3-4-2 | ||
| Cooling system | jacketed watercooled with pump, radiator, 4 blades-320mm diameter fan and thermostat | 6 lt | |
| Lubrication system | wet sump with 1 oil cooler | 3.6 lt | |
| Transmission | |||
| Type | 4 wheel drive | 5 speed manual gearbox. 1988+: X-trac 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 disc, 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, plastic rear airfoil | ||
| 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. 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. 1987: Rear brake disc or caliper protection shield fitted | |
| 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 | 5.5 x 14", 5.5 or 6.5 or 7.5 x 15" | Michelin L5 | |
| Weight | 1050 - 1120 kg | 50% - 50% front - rear distribution | |
| 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) |
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Races
Works team: Mazda Rally Team Europe
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 | oill leak | 10th (1st) | ||||||||||
| Achim Warmbold 'Biche' |
works | eng ine | |||||||||||||
| Rod Millen John Bellefleur |
CRC / Mazda | 10th (2nd) | 7th (1st) | ||||||||||||
| Peter Geitel Kaj Häkkinen |
Haka-Auto | 21st* | |||||||||||||
| David Maslen Andrew Balfour |
39th* | ||||||||||||||
| 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 | ||||||||||||
*Group N4 entries
Article from Auto Express (Greece) 240, 7/1987
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Articles for group N and production
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Source
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Drawings
Suspension
SourceFront suspension
SourceRear suspension
page revision: 233, last edited: 27 Nov 2019 19:44