Citroen SM Serie SB group 2 (1971)

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7133 units built
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Engine manual

Group/Class 2 Homologation number: 628, 1618 and 5348
Years active 1971-1972 Homologation start: 1/4/1977, 1/7/1971 and 1/1/1972
Homologation end: 1/7/1971, 1/1/1972 and 31/12/1979
Type Maserati C114-1, V6 (90o) cyl, 4 stroke located front longitudinal behind front axle
Capacity 2670 cc WRC: 2670 cc
Bore x Stroke (mm) 87.0 x 75.0
Compression ratio 9.0:1
Output power - torgue 170 HP @ 5500 rpm 23.5 kgm @ 4000 rpm
Main bearings 4 of 76 mm diameter steel connecting rod with big end bearing diameter 57mm, aluminium alloy piston with 37.7mm compression height
Materials block: aluminium alloy with cast iron cylinder liners cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers
Cams/valves 2 x 2 overhead camshafts (DOHC), chain driven 2 valves/cyl. - 12 valves total. 42 mm inlet valve diameter, 36 mm exhaust valve diameter. 1 coil spring per valve
Aspiration natural, 3 x Weber 42 DCNF2 carburetors
Ignition electronic, 12V battery
Cooling system jacketed watercooled with pump, radiator, 304 mm diameter-10 blades fan and thermostat 13 lt
Lubrication system wet sump 7 lt
Type front wheel drive Citroen, 5 speed manual gearbox
Gearbox ratios 1st: 2.92/1 (38/13)
2nd: 1.941/1 (33/17)
3rd: 1.321/1 (37/28)
4th: 0.969/1 (32/33)
5th: 0.757/1 (28/37)
R: 3.154/1 (41/22x22/13)
1st: 3.25/1 (39/12)
2nd: 1.833/1 (33/18)
3rd: 1.207/1 (35/29)
4th: 0.852/1 (23/27)
R: 3.154/1 (41/22x22/13)
Diffrential ratio 4.857/1 (34/7), 4.375/1 (35/8) helical gears limited slip front differential
Clutch dry single disc, 230 mm disc diameter
Type steel monocoque mounted on twin longeron main frame SB chassis with roll-cage. 2 door coupe steel bodyshell with steel bumbers
Front suspension upper and lower transverse arms with anti-dive geometry, hydropneumatic spring/damper units, anti-roll bar
Rear suspension trailing arms, hydropneumatic spring/damper units, anti-roll bar
Steering system rack and pinion with hydraulic servo assistance 2 turns lock to lock
Brakes front solid disks 300mm diameter with 2 piston calipers and 60 mm piston diameter, rear solid discs 255 mm diameter and 2 piston calipers 32mm diameter dual circuit
length: 4.893 m (192.6") width: 1.836 m (72.3") height: 1.324 m (52.1")
wheelbase: 2.950 m (116.1") front track: 1.526 m (60.1) rear track: 1.326 m (52.2)
Rims - tires steel rims 6" x 15" 195/70 VR 15
Weight 1380 kg
Fuel tank 90 lt
Drag coefficient 0.33

Results in WSCC


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
A.G.A.C.I. #55, dnt qualify
Claude Laurent in entry list
Works Starts/finishes 2/2 1/0
Driver Team entries and car number
Guy Verrier 55
Gérard Foucault 55

Results in WRC


Works team: Citroen Total


Group 4
Entry Rally event
Team M.C SVE
Entry list
Entry list
Jean Deschaseaux
Jean Plassard
works 1st
Jean-Pierre Nicolas
Jean De Alexandris
works dnf
Total points
10 10
Works starts/finishes 2/1 2/1

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Rally Du Maroc '71
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At Le Mans '71


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