Subaru Impreza GD WRC2002 (S8)
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Viscous coupling center differential
Source
1. Input shaft from engine/clutch
3. 3rd gear of primary shaft
4. 4th gear of primary shaft
5. 5th gear of primary shaft
6. Central differential case
7. Output gear of transfer case
8. Transfer case
9. Input gear of transfer case
10. Cental differential
11. Viscous coupling
12. Front differential pinion shaft
13. Gearbox secondary hollow axle
14. 3rd gear of secondary shaft
15. 2nd gear of secondary shaft
16. 1st gear of secondary shaft
18. Front differential
Source | Develompent chain 1993: Subaru Impreza GC8 555 1997: Subaru Impreza GC8 WRC97 1998: Subaru Impreza GC8 WRC98 1999: Subaru Impreza GC8 WRC99 2000: Subaru Impreza GC8 WRC2000 2001: Subaru Impreza GD WRC2001 2002: Subaru Impreza GD WRC2002 2003: Subaru Impreza GD WRC2003 2004: Subaru Impreza GD WRC2004 2005: Subaru Impreza GD WRC2005 2006: Subaru Impreza GD WRC2006 2007: Subaru Impreza GD WRC2007 2008: Subaru Impreza GE WRC2008 |
Also named Subaru Impreza S44 WRC2002 S8 and Bug Eye
Specifications
7 units builtGroup/Class | A/8 | Homologation number: A 5621 (19/02 WR) | |
Years active | 2002 | Homologation start: 1/3/2002 Homologation end: 31/12/2009 |
|
Engine | |||
Type | EJ207, boxer V4 cyl (180o), 4 stroke, petrol engine | located front longitudinal | |
Capacity | 1994.3 cc | WRC: x 1.7 = 3390.3 cc | |
Bore x Stroke (mm) | 92.0 x 75.0 | ||
Compression ratio | 9.0:1 | ||
Output power - torgue | 300 HP / 5500 rpm | 53.0 kgm (520 Nm) / 4000 rpm | |
Main bearings | 5 of 64mm diameter, 52mm big end journals diameter | connecting rod length between centers 132.5mm, big end bearing diameter 55mm | |
Materials | block: die-cast aluminium alloy, with cast iron "dry type" cylinder liners, 201mm height | cylinderhead: die-cast aluminium alloy 127mm height | |
Cams/valves | 2 x 2 overhead camshafts (DOHC), belt driven with Tumble Generator Valves (TGVs) | 4 valves/cyl. - 16 valves total. 36.2mm inlet valves diameter, 32.2mm exhaust valves diameter. 20.5o angle between inlet valves and vertical, 20.5o angle between exhaust valves and vertical. 1 coil spring per inlet/exhaust valve | |
Aspiration | IHI RX turbocharger (steel turbine 62mm diameter, aluminium compressor 69mm diameter) with chargecooler (air/water intercooler), 34mm turbo restrictor, anti-lag system and catalytic converter fitted. Boshc L-jetronic electronic multi point fuel injection with a drive-by-wire throttle | pressure: 2.0 bar | |
Ignition | MoTeC M800 mapped electronic. Firing order 1-3-2-4 | ||
Cooling system | watercooled | 7.5 lt | |
Lubrication system | wet sump with 1 oil cooler | 5.5 lt | |
Transmission | |||
Type | four wheel drive | 5 speed or Prodrive ATM (Automated Manual Transmission) 6-speed semi-automatic gearbox, electronically controlled, hydraulically actuated paddle-shift, or conventional H-pattern | |
Gearbox ratios | 1st: 3.454/1 (38/11) 2nd: 1.947/1 (37/19) 3rd: 1.366/1 (41/30) 4th: 0.972/1 (35/36) 5th: 0.738/1 (31/42) R: 3.333/1 (26/12 x 40/26) |
1st: 2.923/1 (38/13) 2nd: 2.125/1 (34/16) 3rd: 1.667/1 (30/18) 4th: 1.333/1 (28/21) 5th: 1.087/1 (25/23) 6th: 0.893/1 (25/28) or 6th: 0.853/1 (29/34) R: 2.000/1 (32/16) |
1st: 2.461/1 (32/13) 2nd: 1.933/1 (29/15) 3rd: 1.586/1 (27/17) 4th: 1.316/1 (25/19) 5th: 1.111/1 (20/18) 6th: 0.960/1 (24/25) R: 2.000/1 (32/16) |
Diffrential ratio | center differential (transfer box): 1.100/1 (33/30), and 1.000/1 (53/53), 1.087/1 (25/23), 1.136/1 (25/22), 1.181/1 (26/22), 1.273/1 (28/22), 1.304/1 (30/23), 1.333/1 (28/21), 1.364/1 (30/22), 1.450/1 (29/20). 1.167/1 (21/18), 1.278/1 (23/18), 1.333/1 (24/18) front/rear: 3.900/1 (39/10), and 3.444/1 (31/9), 3.875/1 (31/8), 3.889/1 (35/9), 4.111/1 (37/9), 4.375/1 (35/8) |
gearbox driven shaft permanently coupled with central differential case. Active hydro/electronically controlled viscous coupling center differential, with 1st output through hollow driven gearbox shaft to hypoid spiral bevel gears viscous coupling front differential, and 2nd output to helical gears transfer box, and then to hypoid spiral bevel gears viscous coupling rear differential. 2006+: friction disk limited slip front/rear differentials | |
Clutch | dry double carbon plate, 230mm diameter | ||
Chassis-body | |||
Type | steel monocoque GDA chassis with roll-cage, front and rear steel subframes. 4 door saloon steel bodyshell with extended wheel arches, aluminium front bonnet, polypropylene front and rear bumbers, and synthetic rear spoiler | ||
Front suspension | mac pherson strut with lower L wishbone, coil springs, Bilstein telescopic watercooled gas shock absorbers and anti-roll bar 10 to 40mm diameter | ||
Rear suspension | mac pherson strut with 2 transverse and 1 longitudinal links, coil springs, Bilstein telescopic watercooled gas shock absorbers and anti-roll bar 10 to 40mm diameter | ||
Steering system | power assisted rack and pinion | ||
Brakes | front ventilated disks 366/330/304mm diameter with 6/4 piston calipers, rear ventilated disks 290/304mm diameter with 4/2 piston calipers | dual circuit with Bosch vacuum servo, adjustable ratio split front to rear | |
Dimensions | |||
length: 4.405 m (173.4") | width: 1.770 m (69.7") | height: 1.440 m (56.7") | |
wheelbase: 2.525 m (99.4") | front track: 1.510 m (59.5") | rear track: 1.510 m (59.5") | |
Rims - tires | tarmac: 8" x 18", gravel: 7" x 15" | Pirelli | |
Weight | 1230 kg | ||
Weight/power | 4.1 kg/HP | ||
Fuel tank | 70-120 lt |
Results in WRC
Statistics
2002 | 2003-2006 | 2007 | Total | ||||||||
Works WRC results | |||||||||||
Races | 10 | 10 | |||||||||
Entries/finishes | 15/7 | 15/7 (46.7%) | |||||||||
Others WRC results | |||||||||||
Races | 1 | 1 | |||||||||
Entries/finishes | 1/1 | 1/1 (100%) | |||||||||
Total WRC results | |||||||||||
Races | 10 | 1 | 11 | ||||||||
Entries/finishes | 15/7 | 1/1 | 16/8 (50%) | ||||||||
Total points | 44 | 44 (4.000 per race) (2.750 per entry) |
Races
Works team: Subaru World Rally Team
Season
Entry | Rally event | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Driver Codriver |
Team | MC | SVE | TdC | ESP | CY | ARG | GRE | KEN | FIN | DE | SR | NZ | AUS | RAC | ||
Tommi Mäkinen Kaj Lindström PRO.02.002 |
works | acci dent | |||||||||||||||
Tommi Mäkinen Kaj Lindström PRO.02.005 |
works | 6th | 4th | ||||||||||||||
Tommi Mäkinen Kaj Lindström PRO.02.007 |
works | 7th | tran smis sion | excl uded | |||||||||||||
Petter Solberg Phil Mills PRO.02.003 |
works | 5th | eng ine | ||||||||||||||
Petter Solberg Phil Mills PRO.02.004 |
works | 5th | 3rd | 3rd | |||||||||||||
Petter Solberg Phil Mills PRO.02.006 |
works | acci dent | |||||||||||||||
Petter Solberg Phil Mills PRO.02.002 |
works | eng ine | |||||||||||||||
Achim Mörtl Klaus Wicha PRO.02.006 |
works | driver injured | |||||||||||||||
Frédéric Dor Didier Breton |
sus pen sion | ||||||||||||||||
Total points () |
44 | 6 | 6 | 5 | 4 | 8 | 8 | 7 | |||||||||
Statistics | |||||||||||||||||
Works starts/finishes | 15/7 | 1/0 | 1/1 | 1/1 | 2/0 | 1/1 | 2/1 | 3/1 | 1/0 | 2/1 | 1/1 |
Drawings
Gearbox, front, center differentials and transfer case
SourceViscous coupling center differential
Source
1. Input shaft from engine/clutch
3. 3rd gear of primary shaft
4. 4th gear of primary shaft
5. 5th gear of primary shaft
6. Central differential case
7. Output gear of transfer case
8. Transfer case
9. Input gear of transfer case
10. Cental differential
11. Viscous coupling
12. Front differential pinion shaft
13. Gearbox secondary hollow axle
14. 3rd gear of secondary shaft
15. 2nd gear of secondary shaft
16. 1st gear of secondary shaft
18. Front differential
page revision: 46, last edited: 26 Mar 2019 21:18