Mitsubishi Galant E39A VR4 group A (1988)
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Home » Rally Cars » Mitsubishi Galant E39A VR4
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1970: Mitsubishi Colt Galant A50
1988: Mitsubishi Galant E39A VR4

VR4 = Viscous Realtime 4wd
In RAC '88: see video

Specifications

Group/Class A/8 Homologation number: A5364
Years active 1988-1992 Homologation start: 1/5/1988
Homologation end: 31/12/1996
Engine
Type Mitsubishi 4G63T, straight 4cyl, 4 stroke located front transverse, with 8o front inclination
Capacity 1997.4 cc WRC: x 1.7 = 3395.6 cc
Bore x Stroke (mm) 85.0 x 88.0
Compression ratio 8.5:1
Output power - torgue 280 - 300 HP / 7000 rpm 40.8 kgm (400 Nm) / 5200 rpm
Main bearings forged steel crankshaft with 5 main bearings 61mm diameter connecting rod length between axis 150mm, big end bearing tunnel diameter 48mm
Materials block: cast iron 229mm height, 93mm bore spacing, fitted with twin counter-rotating balancer shafts cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers
Cams/valves 2 overhead camshafts (DOHC), belt driven 4 valves/cyl - 16 valves total. 34.2mm intake valves diameter, 30.7mm exhaust valves diameter. 28.5o angle between inlet valve axis and vertical, 28.5o angle between exhaust valve axis and vertical. Operation with rocker arms
Aspiration 1 x Mitsubishi TD05H-14B turbocharger (12 blades cast iron turbine 49.1/56mm in/out diameter, 12 blades aluminium compressor 43/58.2mm in/out diameter), with air/air intercooler. Mitsubishi ECI Multi multipoint electronic fuel injection
6/1991+: TD05H-16G "large" turbocharger (12 blades cast iron turbine 49.1/56mm in/out diameter, 6+6 blades aluminium compressor 48.2/68.2mm in/out diameter)
1990-1991: 40mm turbo restrictor fitted
1992-1994: 38mm turbo restrictor fitted
1995+: 34mm turbo restrictor fitted
pressure: 0.6 bar
Ignition electronic, firing order 1-3-4-2
Cooling system watercooled 7.5 lt
Lubricating system wet sump 4 lt
Transmission
Type Dynamic 4: four-wheel drive system, four wheel steering system, four-wheel independent suspension, and a four-wheel ABS 5 speed or X-trac 6 speed manual gearbox
Gearbox ratios Type A: 1st: 2.846/1 (37/13)
2nd: 1.684/1 (32/19)
3rd: 1.115/1 (29/26)
4th: 0.833/1 (25/30)
5th: 0.667/1 (22/33)
R: 3.167/1 (38/26 x 26/12)
Type B: 1st: 2.267/1 (34/15)
1990: 1st: 2.063/1 (33/16)
2nd: 1.632/1 (31/19)
2nd: 1.500/1 (30/20)
3rd: 1.048/1 (22/21)
3rd: 1.190/1 (25/21)
4th: 0.985/1 (23/24)
5th: 0.808/1 (21/26)
R: 2.846/1 (37/26 x 26/13)
Type C, dog: 1st: 3.357/1 (47/14)
2nd: 2.563/1 (41/16)
3rd: 2.000/1 (38/19)
4th: 1.652/1 (38/23)
5th: 1.375/1 (33/24)
6th: 1.178/1 (33/28)
R: 3.000/1 (42/16 x 16/14)
Type A, (1991+),: 1st: 2.571/1 (36/14)
2nd: 1.600/1 (32/20)
3rd: 1.160/1 (29/25)
4th: 0.862/1 (25/29)
5th: 0.618/1 (21/34)
R: 3.167/1 (38/26 x 26/12)
Type C, dog (1991+): 1st: 3.467/1 (41/12)
2nd: 2.571/1 (36/14)
3rd: 2.000/1 (32/16)
4th: 1.650/1 (33/20)
1992+: 4th: 1.579/1 (30/19)
5th: 1.381/1 (29/21)
1992+: 5th: 1.261/1 (29/23)
6th: 1.174/1 (27/23)
1992+: 6th: 1.042/1 (25/24)
R: 3.083/1 (37/14 x 14/12)
Diffrential ratio Center differential
Type A: 1.276/1 (37/29)
Type B: 1.280/1 (32/25)
Type C: 1.731/1 (45/26), 1.630/1 (44/27), 1.536/1 (43/28)
Front differential
Type A: 3.867/1 (58/15), or (1991+) 4.267/1 (64/15)
Type B: 4.267/1 (64/15)
Type C: 2.562/1 (41/16), 2.353/1 (40/17), 2.167/1 (39/18)
Transfer box
Types A & B: 1.090/1 (24/22)
Type C: 0.256/1 (10/39)
Rear differential
Type A: 3.545/1 (39/11), or (1991+) 3.909/1 (43/11)
Type B: 3.909/1 (43/11)
Type C: 3.900/1 (39/10)
Gearbox outputs torque to parallel helical gears center differential, with two homocentric outputs on the same side, 1st to upper parallel helical gears friction discs limited slip front differential through hollow shaft, 2nd to lower spiral bevel gears transfer box through solid shaft. Viscous coupling clutch controls torque splitting between front differential and transfer unit. Transfer unit transfers torque to hypoid spiral bevel gears friction discs limited slip rear differential
Clutch dry single disk, 225mm diameter
Chassis-body
Type steel monocoque Mitsubishi E39A chassis with steel front and rear cross member sub-frames. 57kg steel (D38.1x2.6, D38.1x2mm), or 25.5kg aluminium (D38.1x3mm), or 22.5kg aluminium (D40x2.9mm) roll cage. 4 door saloon steel bodyshell with steel doors and bonnets, urethane front/rear bumpers, and urethane rear spoiler.
1989: 46kg steel STKS 2E (D38.1x1.65mm), or 38kg steel SCM435 (D38.1x1.5, D35x1.5mm) roll cage.
1990: 33.5kg steel T45 (D38x1.6mm) roll cage.
1992: all aluminium roll cages cancelled
Front suspension macpherson strut with lower 'L' wishbone, coil spring, telescopic shock absorber and anti-roll bar 10-30mm diameter
Rear suspension "multi link" with trailing semi-trailing arm, 1 upper and 1 lower transverse links, coil spring, telescopic shock absorber and anti-roll bar 10-30mm diameter
Steering system Front rack and pinion with hydraulic power assistance. Rear four wheel steering (4WS) electronic semi-active system with hydraulic cylinder actuated. Activated after 60km/h and has maximum steering angle 1.5o, same direction with front wheels. 2.4 turns lock to lock, 14.1/1 or 11.6/1 ratio
Brakes front ventilated discs 266mm diameter with 1 cast iron piston caliper 53.9mm diameter, rear solid discs 265mm diameter with 1 cast iron piston caliper 30.1mm diameter.
Front/rear ventilated discs 280/290/295/304/315/328/330/350/355mm diameter with 4 aluminium piston calipers (2x44.5+2x41.3)/(2x38.1+2x34.9)/(2x38.1+2x41.3)/32/34.9/36/38.1/41.3mm diameter.
Front/rear solid or ventilated carbon fiber discs 278/292/304/315/330/350/355mm diameter.
1989: front/rear Brembo ventilated discs 278/332/355mm diameter with 4 aluminium piston calipers (2x36+2x40)/(2x38+2x42)mm diameter.
1990: front/rear AP ventilated discs 280/290/300/320/325mm diameter with 2 aluminium piston calipers 36/34.9/38.1/41.3/44.5mm diameter, or 4 aluminium piston calipers (2x38.1+2x44.5)mm piston pairs diameter.
1991: front/rear AP ventilated discs 315/325/330/340/355mm diameter with 6 aluminium piston calipers (2x27+2x36+2x44.5)/(2x27+2x38.1+2x38.1)mm piston pairs diameter, or 4 aluminium piston calipers (2x38.1+2x44.5)mm piston pairs diameter.
dual circuit with Jidoshakiki vacuum servo, adjustable ratio split front to rear. Disc and caliper protection shields and stone scrapper fitted. Additional disc cooling duct. 1991: water cooling for AP calipers with 5 lt water tank
Dimensions
length: 4.560 m (179.5 in) width: 1.695 m (66.7 in) height: 1.440 m (56.7 in)
wheelbase: 2.600 m (102.4 in) front track: 1.460 m (57.5 in) rear track: 1.450 m (57.1 in)
Rims - tires 6" x 15" or 16" 195/70 HR-15
Weight 1300 kg 58% - 42% front to rear distribution
Weight/power 4.4 kg/HP
Fuel tank 62 lt
Drag coefficient 0.36

Rear Suspension
Spring 11.0 x 106 x 389.5 (Wire dia, O.D, free length)
Spring Constant 20.0 N/mm

Shock
Max Length 583 +/-3 mm
Min Length 391 +/-3 mm
Stroke 192 mm

Damping Force
Expansion 1200 N
Contraction 450 N


Results in WRC

Statistics

1988 1989 1990 1991 1992 1993 1994 1995 1996 Total
Works
Races /wins 2 4/2 6 6/1 4 22/3
Entries/finishes 3/1 8/5 11/3 12/8 6/3 40/20 (50%)
Others
Races +3 +3/1 +4/1 +6/1 5 5 5 1 32/3
Entries/finishes 2/1 10/6 7/5 12/7 12/8 8/3 8/3 12/3 2/1 73/37 (50.7%)
Total WRC results
Races/wins 2 7/2 9/1 10/2 10/1 5 5 5 1 54/6
Entries/finishes 5/2 18/11 18/8 24/15 18/11 8/3 8/3 12/3 2/1 113/57 (50.4%)
Total points 50 53 88 48 3 7 5 254
(4.703 per race)
(2.248 per entry)

Races

Works team: Mitsubishi Ralliart Europe

Season
Entry Rally event
Driver
Codriver
Team M.C
Entry list
SVE
Entry list
POR KEN TdC GRE Oly (N.Z) ARG FIN (CdI) S.R RAC
Ari Vatanen
Bruno Berglund
works eng ine
Kenjiro Shinozuka
Fred Gocentas
works gear box 26th
Seisuke Ohba
Yasuo Kusakabe
Tusk Engineering 23th
Tetsuya Fujita
Masao Taguchi
Tusk Engineering acci dent
Statistics
Works starts/finishes 3/1 1/0 2/1
Others starts/finishes 2/1 2/1

47918a.jpg Source
653_galant.jpg Source
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Article from 4T 207, 12/1987

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Turbo

td05-14g-raw.gif Source
Compressor performance diagram of the TD05H-14G turbo
td05-16gsmall-raw.gif Source
Compressor performance diagram of the TD05H-16G turbo

Drawings

mitsubishi-galant-vr4-1991-wrc-full-rally-graphics-kit.jpg Source
mitsubishi_galant_vr-4_1989.jpg Source

Engine

111321_3mg.jpg Source

4WD system

rshnjc.jpg Source
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