BMW 2002 Turbo group 2 (1974)
 Source |
Development chain 1969: BMW 2002 Ti 1974: BMW 2002 Turbo 1987: BMW E30 M3 |
Specifications
BrochureKugelfisher manual
| Group/Class | 2 | Homologation number: 1663 |
| Years active | 1974 - 1975 | Homologation start: 1/8/1974 Homologation end: 1/1/1981 |
| Engine | ||
|---|---|---|
| Type | BMW M31, straight 4cyl, 4 stroke | located front longitudinal |
| Capacity | 1990 cc | WRC: x 1.4 = 2786 cc |
| Bore x Stroke (mm) | 89.0 x 80.0 | |
| Compression ratio | 6.9:1 | |
| Output power - torgue | 170 HP @ 5800 rpm | 24.5 kgm @ 4000 rpm |
| Main bearings | 5 of 48 mm diameter | connecting rod length between centers 148 mm, big end bearing 48 mm diameter, 46.9 mm piston compression height |
| Materials | block: cast iron with 217.5 mm deck height and 98 mm bore spacing | cylinderhead: aluminium alloy |
| Cams/valves | single overhead camshaft (SOHC), chain driven | 2 valves/cyl. - 8 valves total, 46 mm inlet valve diameter, 38 mm exhaust valve diameter |
| Aspiration | KKK JW 1 NRD 2B turbocharger, 6 blades compressor with 44/76 mm in/out blade diameter, 13 blades compressor with 63.2/78 mm out/in blade diameter. Bosch Kugelfischer Schafer PL04-124 Fuel Injection Pump for multipoint mechanical fuel injection | |
| Ignition | electronic, firing order 1-3-4-2 | |
| Cooling system | jacketed watercooled with pump, radiator, 360 mm diameter-5 blades fan and thermostat | 7 lt |
| Lubrication system | dry sump with 3 stage pump | 5 or 6 lt |
| Transmission | ||
| Type | rear wheel drive | Getrag 242/3 or 235/5, 4 or 5 speed manual gearbox |
| Gearbox ratios | 1st: 3.764/1 (34/14) 2nd: 2.020/1 (26/20) 3rd: 1.320/1 (23/27) 4th: 1.00/1 (20/31) R: 4.096/1 (37/14) |
1st: 3.368/1 (30/32) 2nd: 2.16/1 (30/26) 3rd: 1.579/1 (30/23) 4th: 1.241/1 (30/22) 5th: 1.00/1 (30/22) R: 4.00/1 (30/38) |
| Diffrential ratio | 3.36/1 (37/11), 4.11/1 (37/9) | hypoid spiral bevel gears limited slip rear differential |
| Clutch | dry single or double disk 228 mm diameter | |
| Chassis-body | ||
| Type | steel monocoque BMW 114 chassis with roll-cage. 2 door coupe steel bodyshell with steel bumbers with extended wheel arches | |
| Front suspension | mcpherson strut with lower wishbone, coil springs, Bilstein telescopic gas shock absorbers (450lb/in) and 22mm diameter anti roll bar | |
| Rear suspension | semi trailing arm with coil springs, Bilstein telescopic gas shock absorbers (450lb/in) and 19mm diameter anti roll bar | |
| Steering system | ZF Gemmer worm and roller, (no servo) rack and pinion | 3.5 or 2.9 turns lock to lock |
| Brakes | front ventilated disks 254/256/302/304mm diameter, rear drums 250mm diameter with 1 dual piston caliper 22.2 mm diameter | dual circuit with servo, adjustable ratio split front to rear |
| Dimensions | ||
| length: 4.220 m (166.1 in) | width: 1.650 m (65.0 in) | height: 1.270 - 1.410 m (50.0 - 56.0 in) |
| wheelbase: 2.500 m (98.4 in) | front track: 1.375 m (54.1 in) | rear track: 1.362 m (53.6 in) |
| Rims - tires | 5.5J or 6J x 13", 8" - 11" x 15" | 185/70 VR13, 195/70 R15, 235/55 R15 |
| Weight | 1050 kg | |
| Fuel tank | 70 lt | |
| Drag coefficient | 0.40 | |
| rally version: 1st: 2.71/1 () 2nd: 1.84/1 () 3rd: 1.38/1 () 4th: 1.13/1 () 5th: 1.00/1 () |
race version: 1st: 2.30/1 () 2nd: 1.56/1 () 3rd: 1.28/1 () 4th: 1.09/1 () 5th: 1.00/1 () |
Results in WRC
Races
Source
SourceZF Gemmer steering box
Drawings
Source
Chassis and body
Source
Source
SourceRear axle
Engine
Source
page revision: 67, last edited: 25 Dec 2018 09:50