Nissan Fairlady S30 260Z group 4 (1974)
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Home » Rally Cars » Nissan Fairlady S30 260Z
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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 260Z

Specifications

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Group/Class 4/4 Homologation number: 3023, 15/2E, and 3072
Years active 1974 - 1975 Homologation start: 1/3/1974 and 1/10/1975
Homologation end: 31/12/1981
Engine
Type Nissan L26, straight 6cyl, 4 stroke, petrol engine located front longitudinal
Capacity 2565 cc WRC: 2565 cc
Bore x Stroke (mm) 83.0 x 79.0
Compression ratio 8.3:1, group 4: 11.0:1
Output power - torgue 160 HP @ 5400 rpm
260 HP @ 6500 rpm
23.0 kgm @ 4400 rpm
32.6 kgm (320 Nm) @ 5000 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, 35mm exhaust valve diameter. 2 coil springs per inlet/exhaust valve
Aspiration natural, 2 x Hitachi HMB46W, group 4: 3 x Solex-Mikuni 44PHH
Ignition Luminition electronic, firing order 1-5-3-6-2-4
Cooling system jacketed watercooled with pump, radiator, 410 mm diameter-8 blades fan and thermostat 9.4 lt
Lubrication system wet sump, or dry sump 4.7 lt
Transmission
Type rear wheel drive Nissan FS5C71B 5 speed gearbox. 71mm distance between shafts
Gearbox ratios constant: 1.409/1 (31/22)
1st: 3.32/1 (33/14)
2nd: 2.08/1 (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)
constant: 1.409/1 (31/22)
1st: 2.82/1 (32/16)
2nd: 1.97/1 (28/20)
3rd: 1.47/1 (24/23)
4th: 1.19/1 (22/26)
5th: 1.000/1
R: 3.38/1 (36/23 x 23/15)
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)
group 4: constant: 1.409/1 (31/22)
1st: 3.32/1 (33/14)
2nd: 2.27/1 (29/18)
3rd: 1.60/1 (25/22)
4th: 1.24/1 (22/25)
5th: 1.000/1
R: 3.38/1 (36/23 x 23/15)
Diffrential ratio 3.364/1 (37/11), 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 plate 225 mm diameter, group 4: double plate 186 mm disc diameter
Chassis-body
Type steel monocoque short wheel base Nissan R(L)S30 or long wheel base GR(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 and rear spoiler. Group 4: extended wheel arches
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) 2.7 turns lock to lock
Brakes front solid disks with 269/271mm disk diameter and 2 piston calipers 54 mm piston diameter, or front ventilated disc group 4: 276/298 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")
GR: 4.425 m (174.2")
width: 1.630 m (64.2"), group 4: +100 mm height: 1.290 m (50.8")
wheelbase: 2.305 m (90.7")
GR: 2.605 m (102.5")
front track: 1.355 m (53.3") rear track: 1.345 m (53.0")
Rims - tires 5 - 5.5 - 7 - 8 - 10 x 14" - 15" FR70-14, 175/70-14
Weight 930 kg, GR: 1110 kg
Fuel tank 65 lt, group 4: 100 lt
From 3023 homologation for short wheel base
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)

Results in WRC

Races

Works team: Nissan Motor Co

Season
Entry Rally event
Driver
Codriver
Team POR KEN FIN S.R R.L P.R RAC TdC
Ingvar Carlsson
Sölve Andreasson
works eng ine
Harry Källström
Claes Billstam
works 5th 4th
Mario Figueiredo dnf
Zully Remtulla
Nizar Jivani
works 5th
John Smiskol
Carol Smiskol
8th
Kevin Videan
Peter Valentine
Old Woking Service Station dnf
Total points
()
22 6 13 3
Statistics
Others starts/finishes 7/4 3/1 2/2 1/1 1/0

Drawings

nissan-fairlady-240-zg.gif Source
Datsun-240Z.jpg Source

Rear suspension

70ReSusp.jpg Source
280ZRearTransversLink.jpg Source
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