Porsche 911 SC group 4 (1978)
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Chassis numbers here and here and here and here and here
Carrera 3.0 registry
Porsche 915 transmission here and here
Also called Porsche 954 SC RS in 1984
SC means 'Super Carrera'

Specifications

Production data
Coupe: 2566 units built
Targa: 1125 units built
'84 SC RS: 21 units built

Click here
Click here for 2.7
Click here for S 2.7
Click here for SC 3.0 Type J 1977
Click here and here and here and here and here for SC 3.0 '78
Click here and here for Carrera 3.0 '78
Click here and here and here for 954 '84 street version
Click here and here and here for '84 group B Rally car

Homologation number 3062 and transfer group B B207
Homologation start 1/2/1974 1978 1980 1/3/1982 1984
Model 911 SC type G 911 SC type L 911 SC type A 911 SC type B 911 SC RS
Engine Type 911/83 930/ 03, 04, 05, 06, 13, 15 930/ 07, 08, 09 930/10 930/18
Displacement 2687 2994
Compression 8.5:1 8.5:1 8.6:1 9.8:1 10.3:1
Valves I46, E40 I49, E41.5
Aspiration CIS K-jetronic MFI Bosch Mechanical Injection
Power output 210 hp / 154 kW @ 6300rpm 180 hp @ 5500rpm 188 hp / 138 kW @ 5500rpm 204 hp / 150 kW @ 5900rpm 250 hp / 184 kW @ 7000 rpm
Torque 255 Nm / 188 ft·lb / 26 kgm @5100 rpm 165 lb/ft @ 4200rpm 265 Nm / 195 ft·lb / 27 kgm @ 4100 rpm 267 Nm / 197 ft·lb / 27.2 kgm @ 4300 rpm 250 Nm / 184 ft·lb / 25.5 kgm @ 6500 rpm
Since 1984 for 911 SC RS
Engine
Type Porsche Type 930/18, boxer 6 cyl (180o), 4 stroke, petrol engine located longitudinally behind rear axle
Capacity 2994cc
Bore x Stroke (mm) 95.0 x 70.4 mm
Compression ratio 10.3:1
Output power - torgue 280 bhp / 206 kW @ 7000 rpm
300 bhp / 221 kW @ 8000 rpm		 250 Nm (184 lb/ft) @ 6500 rpm
Main bearings forged steel crankshaft with 8 plain main bearings 57mm diameter, 52mm big end journal diameter titanium connecting rods, 127.8mm distance center to center, 56mm big end bearing diameter
Materials block: magnesium alloy, 124.5mm bore spacing, Nikasil cylinder liners cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers
Cams/valves 2 x 1 overhead camshafts (SOHC), chain driven 2 valves/cyl. - 12 valves total. 49mm inlet valve diameter, 41.5mm exhaust valve diameter.
Aspiration natural with Bosch "pulsed injection" D-Jetronic mechanical Fuel Injection system using Kugelfischer PL Injection pump. Click here and here
Ignition electronic, twin spark, firing order 1-6-2-4-3-5
Cooling system aircooled with 245mm diameter 11 blades centrifugal fan, guide vanes, thermostat and cut-off air-flaps
Lubrication system dry sump with 1 oil cooler 11 lt
Transmission
Type rear wheel drive Porsche/ZF 915 here and here (Tutorial 1, Tutorial 2), 5 speed manual gearbox, located in front of rear axle
Gearbox ratios 1st: 3.182/1 (35/11)
2nd: 2.187/1 (35/16)
3rd: 1.600/1 (32/20)
4th: 1.126/1 (29/23)
5th: 1.000/1 (26/26)
R: 3.325/1		 915/06
1st: 3.182/1 (35/11)
2nd: 1.833/1 (33/18)
3rd: 1.261/1 (29/23)
4th: 0.926/1 (21/27)
5th: 0.729/1 (21/29)
R: 3.325/1		 1976, 915/44:
1st: 3.182/1 (35/11)
2nd: 1.833/1 (33/18)
3rd: 1.261/1 (29/23)
4th: 1.000/1 (26/26)
5th: 0.821/1 (23/28)
R: 3.325/1
Diffrential ratio 4.428/1 (31/7), 5.286/1 (37/7), 1976+: 3.875/1 (31/8)
1980+: 4.375/1 (35/8)		 spiral bevel gears limited slip rear differential
Clutch dry single disk 225mm diameter
Chassis-body
Type steel monocoque 911 Types C/D/E/F "Long Wheel Base" chassis. 2 door coupe steel bodyshell with steel bumpers
Front suspension mc pherson strut with lower L wishbone, longitudinal torsion bars, telescopic gas shock absorber and anti-roll bar 15mm diameter
Rear suspension trailing arm with torsion bars, telescopic gas shock absorber and anti-roll bar 15mm diameter
Steering system rack and pinion (no servo) 2.83 turns lock to lock
Brakes front ventilated disks 282mm diameter with 2 steel piston calipers. Rear ventilated disks 290mm diameter with 2 steel piston calipers. Ventilated calipers front and rear. 1980: f/r disc diameter 304/309mm dual circuit (no servo)
Dimensions
length: 4.291 m (168.9") width: 1.652 m (65.0")
width: 1.800 m (70.9)		 height: 1.320 m (52.0")
wheelbase: 2.271 m (89.4") front track: 1.372 m (54.1") rear track: 1.404 m (55.3")
Rims - tires front 6 x 15", rear 7 x 15" front 185/70 VR 15", rear 215/60 VR 15"
Weight 990 kg, **Group B: 1160kg, f/r distribution 43% / 57%
Fuel tank 80 lt

Torque settings

Results in WSCC

Season
Group 4 classification is noted in brackets
930/02 engine
Car entry Car number/ result
Daytona Mugello Dijon Silver stone Nurb Pergusa Watkins Glen Brands Hatch Valle lunga
Team 24h 6h 6h 6h 1000km 6h 6h 6h 6h
Jacques Guérin/ Gérard Bleynie/ Jean-Louis Schlesser #59, in entry list #55, 15th (5th) #29, 7th (3rd) #17, 13th (6th)
Tuckers Fast Food Franchise Ltd #15, 20th (11th)
Total points
4		 4
Statistics
Works Starts/finishes 4/4 1/1 1/1 2/2
Driver Team entries and car number
Tuckers Fast Food Franchise Ltd
Tony Lanfranchi 15
Adrian Yates-Smith 15

Results in WRC

Races

930/02 engine

Season
3.0 lt, 250 hp (184 kW), 300 Nm at 5,500 rpm, 1200 kg
Entry Rally event
Driver
Codriver		 Team MC SVE
Entry list		 KEN POR GRE FIN CAN S.R CdI TdC RAC
Jean-Pierre Nicolas
Vincent Laverne		 Gitanes 1st
Lasse Jönsson
Donald Karlsson		 acci dent 19th
Vic Preston jr
John Lyall		 Porsche AG 2nd
Björn Waldegård
Hans Thorszelius		 Porsche AG 4th
Per Eklund
Bjorn Cederberg		 Happy People 4th
Jurgen Ebenhöh
Claudia Lutter		 dnf
Jacques Almeras
Claude Perramond		 Porsche Almeras 4th
Total points
()		 40 10 16 7 7
Statistics
Others starts/finishes 8/6 1/1 1/0 2/2 1/1 1/0 1/1 1/1

*Group 3 entries

1983-Porsche-911SC-Safari-0-Site-Hero.jpg Source
928335d1429124431-1981-porsche-911-sc-racecar-front-right-corner-view.jpg Source
'81 model
03-03-h-toivonen-grindrod-porsche-911-sc-rs-race-1984.jpg Source
'84 group B Rothmans rally team
img02.jpg?itok=quR4hkQS Source
'84 group B rally
porsche-911sc-1979-silverthorn-1.jpg Source

Drawings

my1974-seethourgh-copyright-porsche.jpg Source
911 2.7
911SC_C870115.jpg Source
74LineDrawing-s.jpg Source
ScreenShot1781348617559.jpg Source
porsche-911sc-1979.gif Source
911blueprint+copy1217367569.jpg Source
page revision: 167, last edited: 23 Sep 2021 21:23
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