Subaru Impreza GDA WRC2002 (S8)
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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 GDA WRC2001
2002: Subaru Impreza GDA WRC2002
2003: Subaru Impreza GDB WRC2003
2004: Subaru Impreza GDB WRC2004
2005: Subaru Impreza GDB WRC2005
2006: Subaru Impreza GDF WRC2006
2007: Subaru Impreza GDF WRC2007
2008: Subaru Impreza GE WRC2008

Also named Subaru Impreza S44 WRC2002 S8 and Bug Eye

Specifications

Group/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
works acci dent 6th 7th tran smis sion excl uded 4th
Petter Solberg
Phil Mills
works 5th 5th eng ine acci dent 3rd eng ine 3rd
Achim Mörtl
Klaus Wicha
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

subaru-mt-diff-visco.jpg Source
Viscous coupling center differential
subaru-manual-transmission.jpg 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
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