Nissan Fairlady S30 240Z group 4 (1970)
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Home » Rally Cars » Nissan Fairlady S30 240Z
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1970: Nissan Fairlady S30 240Z
1974: Nissan Fairlady S30 260Z
1982: Nissan Silvia S110
1983: Nissan Silvia BS110 240RS
1985: Nissan Silvia BS110 240RS-2

Also called Datsun 240Z
Click here for S20 engine

Specifications

172732 units built
Click here and here and here for street version

Group/Class 4/4 Homologation number: 3023 and B3023
Years active 1970 - 1974 Homologation start: 1/4/1970
Homologation end: 31/12/1981
Engine
Type Nissan L24, straight 6cyl, 4 stroke, petrol engine located front longitudinal
Capacity 2394 cc WRC: 2394 cc
Bore x Stroke (mm) 83.0 x 73.7
Compression ratio 9.0:1, 1972, group 4: 11.0:1
Output power - torgue 150 HP @ 6000 rpm
220 - 225 HP @ 7200 rpm		 20.5 kgm @ 4400 rpm
25.5 kgm (250 Nm) @ 4800 rpm
Main bearings 7 of 55 mm diameter connecting rod length between centers 133mm, big end bearing internal diameter 50mm. Cast aluminium alloy piston with 38 mm compression height
Materials block: cast iron, 207.85mm deck height (265.9mm from top to bottom oil pan), bore spacing 96.5mm between cylinders 1-2, 2-3, 4-5 and 5-6, and 98mm between cylinders 3-4 cylinderhead: cast aluminium alloy
Cams/valves single overhead camshaft (SOHC), chain driven 2 valves/cyl. - 12 valves total. 42mm inlet valve diameter, 33mm exhaust valve diameter. 2 coil springs per inlet/exhaust valve
Aspiration natural, 2 x Hitachi HJG46W, group 4: 3 x Solex-Mikuni 44PHH, or 3 x Dellorto/Weber DCOE
Ignition electronic, firing order 1-5-3-6-2-4
Cooling system jacketed watercooled with pump, radiator, 385 mm diameter-7 blades fan and thermostat 8 lt
Lubrication system wet sump 5 lt
Transmission
Type rear wheel drive Nissan FS5C71B 5 or 4 speed gearbox. 71mm distance between shafts
Gearbox ratios constant: 1.318/1 (29/22)
1st: 3.549/1 (29/22)
2nd: 2.197/1 (30/18)
3rd: 1.420/1 (28/26)
4th: 1.000/1
R: 3.164/1 (36/17 x 17/15)		 constant: 1.217/1 (28/23)
1st: 2.678/1 (33/15)
2nd: 1.704/1 (28/20)
3rd: 1.262/1 (28/27)
4th: 1.000/1
5th: 0.852/1 (21/30)
R: 2.922/1 (36/17 x 17/15)		 constant: 1.217/1 (28/23)
1st: 2.957/1 (34/14)
2nd: 1.858/1 (29/19)
3rd: 1.311/1 (28/26)
4th: 1.000/1
5th: 0.852/1 (21/30)
R: 2.922/1 (36/17 x 17/15)		 constant: 1.217/1 (28/23)
1st: 1.858/1 (29/19)
2nd: 1.383/1 (25/22)
3rd: 1.217/1 (27/27)
4th: 1.000/1
5th: 0.852/1 (21/30)
R: 2.922/1 (36/17 x 17/15)
Diffrential ratio 3.364/1 (37/11), 3.545/1 (39/11), 3.700/1 (37/10), 3.90/1 (39/10),
group 4: 4.111/1 (37/9), 4.375/1 (35/8), 4.625/1 (37/8), 4.875/1 (39/8), 5.125/1 (41/8)		 R180 or later R200 hypoid spiral bevel gears friction limited slip rear differential
Clutch dry single disc 227 mm diameter
Chassis-body
Type steel monocoque Nissan H(L)S30 chassis with roll cage and front suspension subframe. 2 door coupe steel bodyshell with steel bumbers and fibre glass bonnet or boot lid. Group 4: extended wheel arches, and rear spoiler
Front suspension mc pherson strut with lower wishbone, coil spring, telescopic shock absorber and anti-roll bar
Rear suspension chapman strut with lower wishbone, coil spring, telescopic shock absorber and anti-roll bar
Steering system rack and pinion (no servo) 3 turns lock to lock
Brakes front solid disks with 271mm disk diameter and 2 piston calipers 54 mm piston diameter, or front ventilated disc 271 or (1972:) 276 mm disc diameter with 4 piston calipers with 41.3 mm piston diameter. Rear drums 229mm diameter with 1 dual piston caliper 22.2 mm piston diameter dual circuit with servo, adjustable ratio split front to rear
Dimensions
length: 4.115 m (162")
1973: 4.305 m (169.5")		 width: 1.630 m (64.2"), group 4: +100 mm height: 1.285 m (50.6")
wheelbase: 2.305 m (90.7") front track: 1.355 m (53.3") rear track: 1.345 m (53.0")
Rims - tires 4.5 - 5.5 - 7 - 8 - 10 x 14" - 15" FR70-14, 175/70-14
Weight 920 - 1150 kg
Fuel tank 60 lt, group 4: 100 lt
1972
constant: 1.318/1 (29/22)
1st: 3.20/1 (34/14)
2nd: 2.20/1 (30/18)
3rd: 1.64/1 (31/25)
4th: 1.22/1 (26/28)
5th: 1.000/1
R: 3.16/1 (36/17 x 17/15)		 constant: 1.524/1 (32/21)
1st: 3.59/1 (33/14)
2nd: 2.25/1 (28/19)
3rd: 1.41/1 (26/28)
4th: 1.000/1
R: 3.66/1 (36/23 x 23/15)		 constant: 1.409/1 (31/22)
1st: 2.91/1 (33/16)
2nd: 1.90/1 (27/20)
3rd: 1.31/1 (29/28)
4th: 1.00/1
5th: 0.86/1 (19/31)
R: 3.38/1 (36/23x 23/15)

Results in WSCC

Season
Group 4 classification is noted in brackets
Car entry, chassis number Car number/ result
Buenos Ayres Dayt Sebring Brands Hatch Monza Spa Targa Florio Nurb Le Man Zeltweg Watkins Glen
Team 1000km 6h 12h 1000km 1000km 1000km 1000km 24h 1000km 6h
Ross Racing Ltd #73, OTL
Motor Racing Facilities Ltd #47, dnt qualify
Statistics
Works Starts/finishes 2/0 1/0 1/0
Driver Team entries and car number
Ross Racing Ltd
Craig Ross 73
Jacques Groleau 73
Motor Racing Facilities Ltd
Robert Grant 47
Martin Birrane 47

Results in WRC

Races

Works team: Nissan Motor Co

Season
Entry Rally event
Driver
Codriver		 Team M.C SVE
Entry list		 S.R KEN A GRE RAC
Entry list
Rauno Aaltonen
Paul Easter		 works 7th
Tony Fall
Geraint Phillips		 works diffe rential
Edgar Herrmann
Hans Schüller		 works diffe rential
John Bloxham
Norman Salt		 diffe rential
Total points
()		 4 4
Statistics
Others starts/finishes 4/1 4/1
Datsun_Fairlady_240Z_001.JPG Source
CylinderHeads3.jpg Source

Drawings

zcut.jpg Source
Datsun_240Z_cutaway_by_Shin_Yoshikawa.84212735.jpg Source
Nissan_Fairlady_240ZG_cutaway_by_Shin_Yoshikawa.77222128_std.jpg Source
nissan-fairlady-240-zg.gif Source
datsun_240z_1969.jpg Source

Suspension

70ReSusp.jpg Source
280ZRearTransversLink.jpg Source
Rear suspension
page revision: 132, last edited: 11 Jun 2022 10:55
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