Nissan Silvia BS110 240RS Evolution group B (1985)

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Source

Development chain 1970: Nissan Fairlady S30 240Z 1974: Nissan Fairlady S30 260Z 1982: Nissan Silvia S110 1983: Nissan Silvia BS110 240RS 1985: Nissan Silvia BS110 240RS Evolution

In Acropolis rally '85: see video

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Specifications

20 units built

Group/Class	B/12	Homologation number: B233 10/01 ET
Years active	1985-1986	Homologation start: 1/3/1985 Homologation end: 31/12/1989
Engine
Type	Nissan FJ24 straight 4cyl, 4 stroke, petrol engine	located front longitudinal with 12o inclination to drivers side (LHD), and 3.7o back angle
Capacity	2391 cc	WRC: 2391 cc
Bore x Stroke (mm)	93.0 x 88.0
Compression ratio	12.0:1
Output power - torgue	277 HP/ 8000 rpm	27.0 kgm (265 Nm) / 6200 rpm
Main bearings	forged steel crankshaft with 5 main bearings 63.6mm diameter	connecting rod distance center to center 140mm, big end bearing tunnel diameter 53mm
Materials	block: cast iron	cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers
Cams/valves	2 overhead camshafts (DOHC), 76o cam, chain driven	4 valves/cyl. - 16 valves total. 36mm inlet valves diameter, 30mm exhaust valves diameter
Aspiration	natural, 2 x Solex-Mikuni 50 PPH carburetors
Ignition	electronic, firing order 1-3-4-2
Cooling system	jacketed watercooled with pump, radiator, fan and thermostat
Lubrication system	wet or dry sump
Transmission
Type	rear wheel drive	Nissan, 5 speed manual gearbox
Gearbox ratios	constant: 1.111/1 (20/18) 1st: 3.611/1 (39/12) 2nd: 2.619/1 (33/14) 3rd: 2.037/1 (33/18) 4th: 1.605/1 (26/18) 5th: 1.270/1 (24/21) R: 2.778/1 (40/21 x 21/16)	constant: 1.111/1 (20/18) 1st: 3.611/1 (39/12) 2nd: 2.619/1 (33/14) 3rd: 1.961/1 (30/17) 4th: 1.605/1 (26/18) 5th: 1.159/1 (24/23) R: 2.778/1 (40/21 x 21/16)
Diffrential ratio	4.625/1 (37/8), 3.70/1 (37/10), 5.143/1 (36/7), 3.154/1 (41/13), 3.364/1 (37/11), 3.545/1 (39/11), 3.889/1 (35/9), 4.111/1 (37/9), 4.375/1 (35/8), 4.875/1 (39/8), 5.429/1 (38/7)	hypoid spiral bevel gears, 75% limited slip rear differential
Clutch	dry, single disk
Chassis-body
Type	Steel monocoque BS110 chassis of Nissan S platform with roll-cage, 2 door steel saloon/coupe bodyshell with FRP wheel arch extensions. Front bonnet with ventilation louvers
Front suspension	macpherson strut with 2 lower 'A' links, adjustable pivots, coil springs, telescopic gas shock absorbers and antiroll bar
Rear suspension	live axle with 2 lower longitudinal radius links, 2 upper small 45o locating links, adjustable pivots, coil springs and telescopic gas shock absorbers
Steering system	rack and pinion	13.9/1 ratio
Brakes	front ventilated disks 261mm diameter with 4 cast iron piston calipers 41.3mm diameter, rear solid discs 258mm with 1 cast iron piston caliper 38.1mm diameter. Front/rear ventilated discs 261/277/292mm diameter, 4 aluminium piston calipers 38/41.3mm diameter, or rear 4 cast iron or aluminium piston calipers 41.3mm diameter	dual circuit with Jidoshakiki vacuum servo, adjustable ratio split front to rear
Dimensions
length: 4.330 m (170.5")	width: 1.828 m (72")	height: 1.310 m (51.6")
wheelbase: 2.400 m (94.5")	front track: 1.410 m (55.5")	rear track: 1.395 m (54.9")
Rims - tires	6" x 14"	Dunlop 215/60-14
Weight	970 kg
Fuel tank	53, 60, 80, 100 lt

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Results in WRC

Statistics

	1985	Total
Total WRC results
Races	4	6
Entries/finishes	16/13	16/13 (81.3%)
Total points	64	64 (10.667 per race) (4.000 per entry)

Races

Works team: Team Nissan Europe

1985Season

Entry		Rally event
Driver Codriver	Team	M.C	SVE Entry list	POR	KEN	TdC	GRE	N.Z	ARG	FIN	S.R	(CdI)	RAC
Terry Kaby Kevin Gormley 023	works												7th
Mike Kirkland Anton Levitan	works				3rd		7th
Mike Kirkland Rob Combes 055	works											4th
Alain Ambrosino Daniel Le Saux 027	works				6th							3rd
Shekhar Mehta Rob Combes/ Yvonne Mehta	works				acci dent		4th	elec trical
Shekhar Mehta Yvonne Mehta 025	works								4th
Iórgos Moschous Dimítris Vazakas	works						8th
Jayant Shah Ivan Smith/ Mike Doughty/ Lofty Drews 096					differ ential		14th		7th
Reg Cook Wayne Jones 020	works							6th
Jim Donald Kevin Lancaster 016	works							9th
Total points ()	64				13		14	7	11			15	4
Statistics
Starts/finishes	16/13				4/2		4/4	3/2	2/2			2/2	1/1

Works team:
Safari rally: D.T. Dobie Co
Acropolis rally: N.I. Theocharakis entries
New Zealand rally: Nissan New Zealand

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Source
Shekhar Mehta 1985
Source