Toyota Supra MA70 3.0i group A (1987)

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Source

Development chain 1987: Toyota Supra MA70 3.0i 1987: Toyota Supra MA70 Turbo

Specifications

Group/Class	A/8	Homologation number: A5331
Years active	1987	Homologation start: 1/4/1987 Homologation end: 31/12/1995
Engine
Type	Toyota 7M-GE, straight 6 cyl, 4 stroke, petrol engine		located front longitudinal with 2.4o front inclination
Capacity	2954 cc		WRC: 2954 cc
Bore x Stroke (mm)	83.0 x 91.0
Compression ratio	11.0:1
Output power - torgue	270 - 290 HP / 6800 rpm		30.6 kgm (300 Nm) / 6000 rpm
Main bearings	forged steel crankshaft with 7 main bearings 64mm diameter	connecting rod distance between centers 152mm, big end bearing tunnel diameter 55mm
Materials	block: cast iron	cylinderhead: crossflow aluminium alloy with hemispherical combustion chambers
Cams/valves	2 overhead camshafts (DOHC), belt driven	4 valves/cyl. - 24 valves total. 32.2mm inlet valves diameter, 27.7mm exhaust valves diameter. 25o angle between inlet valve axis and vertical, 25o angle between exhaust valve axis and vertical
Aspiration	natural, Nippondenso L-Jetronic multipoint electronic fuel injection
Ignition	electronic, NGK BCPR6EY or BCPR5EP11 spark plug, firing order 1-5-3-6-2-4
Cooling system	jacketed watercooled with pump, radiator, fan and thermostat		7.5 lt
Lubricating system	wet sump		5 lt
Transmission
Type	rear wheel drive	Toyota W58 or Hewland, 5 speed manual gearbox
Gearbox ratios	constant: 1.353/1 (46/34) 1st: 3.286/1 (34/14) 2nd: 1.894/1 (35/5) 3rd: 1.276/1 (33/35) 4th: 1.000/1 5th: 0.783/1 (33/57) R: 3.769/1 (31/14 x 39/31)	constant: 1.300/1 (26/20) 1st: 2.687/1 (31/15) 2nd: 1.773/1 (30/22) 3rd: 1.357/1 (24/23) 4th: 1.114/1 (24/28) 5th: 1.000/1 R: 4.000/1 (23/13x40/23)	1989: constant: 1.038/1 (27/26) 1st: 2.337/1 (36/16) 2nd: 1.681/1 (34/21) 3rd: 1.355/1 (30/23) 4th: 1.163/1 (28/25) 5th: 1.000/1 R: 2.661/1 (16/16x41/16)
Diffrential ratio	4.300/1 (43/10), 3.583/1 (43/12), 3.727/1 (41/11), 3.769/1 (49/13), 4.091/1 (45/11), 4.100/1 (41/10), 4.273/1 (47/11), 3.909/1 (43/11), 4.545/1 (50/11), 4.556/1 (41/9), 4.778/1 (43/9), 4.889/1 (44/9), 5.375/1 (43/8), 3.154/1 (41/13), 3.308/1 (43/13). 1988: 3.417/1 (41/12), 3.250/1 (39/12), 3.083/1 (37/12), 2.917/1 (35/12), 2.833/1 (34/12)		hypoid spiral bevel gears limited slip rear differential
Clutch	dry, double disc
Chassis-body
Type	steel monocoque MA70 chassis of Toyota A platform with 33kg steel 25CrMo4 (D40x1.5mm and D40x1) roll-cage. 3 door coupe steel bodyshell with steel doors and front/rear bonnets and plastic front/rear bumpers
Front suspension	double unequal wishbones, upper small "A" and lower big "L", coil springs and telescopic gas shock absorbers with antiroll bar. 1989: D30 to D50 antiroll bar diameter
Rear suspension	multilink with upper small "A" wishbone, lower longitudinal radius rod, lower transverse tie rod, coil springs and telescopic gas shock absorbers with antiroll bar D25, D31 and D32mm diameter. 1989: D20 to D40 antiroll bar diameter
Steering system	rack and pinion with hyrdaulic power assistance		16.5/1, 14.47/1, 15.94/1 ratio. 1989: 13.3/1 ratio
Brakes	front ventilated discs 302mm diameter with 1 cast iron piston caliper 60.3mm diameter, rear ventilated discs 291mm diameter with 1 cast iron piston caliper 38.1mm diameter. Front/rear ventilated discs 304/330/356mm diameter with 4 Girling aluminium piston calipers 32/36/38.1/42.8/(2x41.3+2x38.1)/(2x44.5+2x41.3)mm pairs diameter. Front/rear ventilated discs 332/355mm diameter with 4 Brembo aluminium piston calipers 2x38+2x42mm pairs diameter, or 278/280/305mm diameter with 4 Brembo aluminium piston calipers 2x36+2x40mm pairs diameter. 1990: front 6 aluminium piston caliper 2x28.5+2x31.7+2x41.2mm pairs diameter		dual circuit with Aisin vacuum servo, wheel scraper, disc dust shield and water cooled calipers with water tank and pump for brakes windscreen and head lights cleaning
Dimensions
length: 4.620 m (181.9")	width: 1752 m (69")		height: 1.330 m (52.4")
wheelbase: 2.595 m (102.2 in)	front track: 1.470 m (57.9")		rear track: 1.475 m (58.0")
Rims - tires	16"	Pirelli, front: 165/80/16" or 175/75/16" or 185/65/16", rear: 185/75/16" or 205/65/16" or 215/60/16"
Weight	1450 - 1500 kg
Fuel tank	70 lt
Drag coefficient	0.33

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Results in WRC

Statistics

	1987	Total
Total works WRC results
Races	3	3
Entries/finishes	6/3	6/3 (50%)
Total points	18	18 (6 per race) (3 per entry)

Races

Works team: Toyota Team Europe

1987Season

Entry		Rally event
Driver Codriver	Team	MC	SVE Entry list	POR	KEN	TdC	GRE	Oly	(NZ)	ARG	FIN	(CdI)	SR	RAC
Lars-Erik Torph Benny Melander	works				3rd			eng ine
Björn Waldegård Fred Gallagher	works				eng ine			6th
Robin Ulyate Ian Street	works				6th							with drawn*
Total points ()	18				13			5
Statistics
Others starts/finishes	6/3				3/2			2/1				1/0

*Private entry

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Article from 4T 199, 4/1987

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Article for street version 4Τ 223, 4/1989

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Source
7M-GE engine Source
Bjorn Waldergard in Safari rally 1987

Drawings

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