Toyota Celica ST165 GT4 group A (1988)
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Home » Rally Cars » Toyota Celica ST165 GT4
sx1.jpg Development chain
1971: Toyota Celica TA22
1974: Toyota Celica RA20
1978: Toyota Celica RA40 GT2000
1988: Toyota Celica ST165 GT4
1992: Toyota Celica ST185 4WD Turbo
1994: Toyota Celica ST205 GT4
Development level
Group A
Group N

Specifications

All about Toyota twin cam
Group/Class A/8 Homologation number: A5363
Years active 1988 - 1992 Homologation start: 1/5/1988
Homologation end: 31/12/1994
Engine
Type Toyota 3S-GTE, straight 4 cyl, 4 stroke, petrol engine located front transverse with 24o rear inclination
Capacity 1998.2 cc WRC: x 1.7 = 3397 cc
Bore x Stroke (mm) 86.0 x 86.0
Compression ratio 8.5:1
Output power - torgue 1988: 260 HP
1989 +: 300 HP / 7000 rpm
1988: 32.5 kgm (319Nm) / 3600 rpm
1989+: 40.0 kgm (392 Nm) / 4000 rpm
Main bearings forged steel crankshaft with 5 main bearings 59mm diameter, big end journals diameter 48mm connecting rod length between centers 138mm, big end bearing tunnel diameter 51mm, aluminium alloy piston with 35.1mm compression height
Materials block: cast iron, 216mm deck height, 273mm height cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers 119mm height
Cams/valves dual overhead camshafts (DOHC), belt driven, equiped with T-VIS 4 valves/cyl - 16 valves total. 33.6mm inlet valve diameter, 29.1mm exhaust valve diameter. 25o angle between inlet valve axis and vertical, 25o angle between exhaust valve axis and vertical. 1 coil spring per valve
Aspiration Toyota CT26 turbocharger (10 blades nickel alloy turbine 52/68mm in/out diameter, 10 blades aluminium compressor 42.1/65mm in/out diameter) with air/air intercooler. Nippon Denso L-jetronic multipoint electronic fuel injection.
1990-1991: 40mm turbo restrictor fitted
1992-1994: 38mm turbo restrictor fitted.
pressure: 1988: 0.8 bar, 1989+: 1.2 bar
Ignition electronic, NGK BCPR5EP8 spark plugs, 1-3-4-2 firing order
Cooling system jacketed watercooled with pump, radiator, fan and thermostat 8 lt
Lubricating system wet sump with 1 oil cooler 4.5 lt
Transmission
Type four wheel drive Toyota E50F2, 5 speed or X-Trac (dog) 6 speed manual gearbox
Gearbox ratios 1st: 3.583/1 (43/12)
2nd: 2.045/1 (45/22)
3rd: 1.333/1 (40/30)
4th: 0.972/1 (35/36)
5th: 0.732/1 (30/41)
R: 3.583/1 (26/12 x 43/26)
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: 1.192/1 (31/26)
R: 3.000/1 (16/14 x 42/16)
1989, X-trac dog: 1st: 3.385/1 (44/13)
2nd: 2.563/1 (41/16)
3rd: 2.000/1 (38/19)
4th: 1.714/1 (36/21)
5th: 1.478/1 (34/23)
6th: 1.280/1 (32/25)
R: 3.000/1 (16/14 x 42/16)
1990 X-trac dog: 1st: 3.462/1 (45/13)
2nd: 2.563/1 (41/16)
3rd: 1.889/1 (34/18)
4th: 1.545/1 (34/22)
5th: 1.261/1 (29/23)
6th: 1.069/1 (31/29)
R: 3.000/1 (16/14 x 42/16)
1991 X-trac dog: 1st: 3.417/1 (41/12)
2nd: 2.571/1 (36/14)
3rd: 2.000/1 (32/16)
4th: 1.722/1 (31/18)
5th: 1.476/1 (31/21)
6th: 1.286/1 (27/21)
R: 3.083/1 (14/12 x 37/14)
1992 X-trac synchro: 1st: 3.417/1 (41/12)
2nd: 2.571/1 (36/14)
3rd: 2.000/1 (32/16)
4th: 1.650/1 (33/20)
5th: 1.375/1 (33/24)
6th: 1.192/1 (31/26)
R: 3.083/1 (14/12 x 37/14)
1993 X-trac dog: 1st: 4.000/1 (48/12)
2nd: 2.714/1 (38/14)
3rd: 2.000/1 (38/19)
4th: 1.545/1 (34/22)
5th: 1.261/1 (29/23)
6th: 1.069/1 (31/29)
R: 3.000/1 (16/14 x 42/16)
Diffrential ratio Center: 4.286/1 (60/14), 3.933/1 (59/15), 4.214/1 (59/14), 4.143/1 (58/14), 4.071/1 (57/14), 3.867/1 (58/15), 3.800/1 (57/15), 3.733/1 (56/15), 3.563/1 (57/16), 3.500/1 (56/16), 3.438/1 (55/16), 3.176/1 (54/17), 2.944/1 (53/18), 2.750/1 (55/20), 2.571/1 (54/21), 2.842/1 (54/19), 2.947/1 (56/19), 3.056/1 (55/18), 3.294/1 (56/17), 3.412/1 (58/17).
1990: 3.692/1 (48/13), 3.769/1 (49/13), 3.667/1 (44/12), 3.750/1 (45/12), 3.833/1 (46/12), 3.917/1 (47/12), 4.000/1 (48/12), 4.083/1 (49/12), 4.167/1 (50/12), 4.250/1 (51/12), 3.846/1 (50/13), 3.429/1 (48/14).
Transfer box x rear differential: 14/41x41/14, 9/35x35/9, 11/43x43/11, 12/35x35/12
Helical gears center differential with, one side-1st output to internally located limited slip front differential, and other side 2nd output to transfer box. Viscous coupling clutch controls torque spliting between front differential housing and transfer box, using homocentric shafts. Spiral bevel gears transfer box transfers torque to, hypoid spiral bevel gear, torsen rear differential. 28%-72% to 50%-50% front to rear torque distribution. (see info)
Clutch dry, single disk 236mm diameter
Chassis-body
Type Steel monocoque Toyota ST165 chassis with front cross member for front suspension, and rear cross member subframe for differential and suspension support. 31kg steel 25CrMo4 (D40x2 and D40x1.5mm), or 31.5-34kg steel SCM430 (D40x1.5 and D40x1mm), or 23kg AlZnMg1 (D40x3) roll-cage. 3 door liftback/coupe steel bodyshell with steel front/rear bonnets, steel doors, urethane front/rear bumpers and plastic rear spoiler.
1992: aluminium alloy rollcages are cancelled
Front suspension macpherson strut with lower 'L' wishbone, coil springs, telescopic gas shock absorbers and 22mm (gravel) or 25mm (tarmac) anti-roll bar (see picture)
Rear suspension macpherson strut with one trailing link and two lateral links, coil springs, telescopic gas shock absorbers and 16mm anti-roll bar only for tarmac. No anti-roll bar for gravel
Steering system rack and pinion with hydraulic power assistance 16.3/1, 12.1/1, 13.7/1, 17.1/1, 21.8/1
Brakes front ventilated disks 255mm diameter with 1 cast iron piston caliper 42.9/57.2mm diameter or 2 cast iron piston calipers 42.9mm diameter, rear solid disks 269mm diameter with 1 cast iron piston caliper 31.8/34.9mm diameter.
Front/rear ventilated discs 280/295/304/310/315/330mm diameter.
Front 4 or 2+2 aluminium AP piston calipers 35/38/42.8/44.5/(2x41.3+2x44.5)/(2x41.3+2x38.1/(2x35+2x38)mm diameter.
Rear 4 or 2+2 aluminium AP piston calipers 35/38.1/42.8/(2x41.3+2x38.1)/(2x35+2x38)mm diameter
1989: front/rear solid or ventilated carbon discs 280/295/328mm diameter, 4 aluminium piston calipers 25.4mm diameter, 2 aluminium piston calipers 34.9/31.7/38/1/35/41.3/42.8/44.5mm diameter.
1990: front/rear Brembo ventilated discs 305/320/328/278mm diameter with Brembo 2+2 aluminium piston calipers (2x36+2x40)/(2x38+2x44)/(2x30+2x34)/(2x34+2x38)mm diameter.
1991: front/rear Alcon 4 aluminium piston calipers 25.4/31.7/35/38/41.3mm, or Alcon 2+2 aluminium piston calipers (2x35+2x38)/(2x36+2x40)/(2x38+2x41.2)/(2x38+2x44)/(2x41.3+2x44.5)mm diameter
dual circuit with Aisin vacuum servo, no servo, adjustable ratio split front to rear. Stone scraper and disc protection shield fitted. 1989: brake caliper water cooling system added with 17 lt water tank capacity
Dimensions
length: 4.365 m (171.9 in) width: 1.700 m (66.9 in) height: 1.300 m (51.2 in)
wheelbase: 2.525 m (99.4 in) front track: 1.465 m (57.7 in) rear track: 1.440 m (56.7 in)
Rims - tires gravel: 7" x 15",
tarmac: 16"
Pirelli, gravel: SG90 185/75-15, SG35 195/70-15, 205/65-15
Weight 1100 - 1150 kg
Fuel tank 60 - 80 lt
Drag coefficient 0.33

Results in WRC

Statistics

1988 1989 1990 1991 1992 1993 1994 Total
Works
Races/(gr A wins) 5 8/1 11/5 11/6 1 36/12
Entries/finishes 12/3 21/11 23/17 26/21 1/0 83/52 (63.4%)
Others
Races/(gr A wins) +1 +2 +3 10/1 +6 4 26/1
Entries/finishes 1/1 13/8 11/5 19/12 20/11 11/1 7/3 81/41 (50.6%)
Total WRC results
Races/(gr A wins) 6 10/1 11/5 13/6 10/1 7 4 62/13
Entries/finishes 13/4 34/19 34/22 46/33 20/11 11/1 7/3 164/93 (56.7%)
Total points 21 108 147 172 44 11 503
(8.113 per race)
(3.067 per entry)

Races

Works team: Toyota Team 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
Juha Kankkunen
Juha Piironen
works eng ine eng ine eng ine acci dent acci dent
Kenneth Eriksson
Peter Diekmann
works 6th trans miss ion 6th eng ine
Björn Waldegård
Fred Gallagher
works trans miss ion 3rd
Jimmy McRae
Rob Arthur
works eng ine
Tetsuo Sano
Takeo Henmi
8th
Group N4
Gilberto Pianezzola
Lucio Baggio
21st (8th)
Graham Middleton
Paul Watkins
acci dent
Total points
()
21 5 3 5 8
Statistics
Works Starts/finishes 12/3 2/1 2/0 2/0 2/1 4/1
Others Starts/finishes 1/1 1/1

Works team:
RAC: Toyota Team Great Britain


1.1991%2B-%2BCarlos%2BSainz%2B-%2BToyota%2BCelica%2BGT4%2B-%2BMontecarlo%2B1%25C2%25BA-%2B7.jpg Source
Carlos Sainz in Tour de Corse '90

Information and articles

Article from 4T 227, 8/1989

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Atricle from 4T 207, 12/1987

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Article from 4T 205, 10/1987

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Drawings

Transmission

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transfer1.gif Source

Suspension

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