Porsche 911 SC group 4 (1974)
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Chassis numbers here and here and here
Carrera 3.0 registry
Porsche 915 transmission here and here
Carrera SC 3
Also called Porsche 954 SC RS in 1984

Specifications

3.0 lt models Type I for 1976, and Type J for 1977
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 3060 3061 3062 B207
Homologation start 1/2/1974 1/4/1976 1978 1980 1/3/1982 1984
Model 911 type G 911 S type G 911 SC type G 911 SC type I 911 SC type L 911 SC type A 911 SC type B 911 SC RS
Engine Type 911/41 911/42 911/83 930/02 930/03 930/09 930/10 930/18
Displacement 2687 2994
Compression 8.0:1 8.5:1 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 150 hp @ 5700rpm 175 hp @ 5800rpm 210 hp / 154 kW @ 6300rpm 200 hp / 147 kW @ 6000rpm 180 hp @ 5500rpm 188 hp / 138 kW @ 5500rpm 204 hp / 150 kW @ 5900rpm 250 hp / 184 kW @ 7000 rpm
Torque 173 lb/ft @3800 rpm 175 lb/ft @4000 rpm 255 Nm / 188 ft·lb / 26 kgm @5100 rpm 255 Nm / 188 ft·lb / 26 kgm @ 4200rpm 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
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 lining cylinderhead: aluminium alloy
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
Lubrication system dry sump with 1 oil cooler 11 lt
Transmission
Type rear wheel drive Porsche Type 911/01, Porsche 915 (Tutorial 1, Tutorial 2), 5 speed gearbox
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
1st: 3.182/1 (35/11)
2nd: 1.778/1 (32/18)
3rd: 1.261/1 (29/23)
4th: 0.926/1 (21/27)
5th: 0.729/1 (21/29)
R: 3.325/1
1976+: 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
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 dual circuit with 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: 2.272 m (89.4") front track: 1.369 m (53.9") rear track: 1.379 m (54.3")
Rims - tires 6 x 15" 185/70 VR 15"
Weight 1000 kg, Group B: 1160kg, f/r distribution 43% / 57%
Fuel tank 80 lt

Results in WSCC

Season
Group 4 classification is noted in brackets
911/83 engine
Car entry, chassis number Car number/ result
Dayt Mugelo Dijon Monza Spa Pergusa Nurb Zeltweg Watkins Glen
Team 24h 1000km 800km 1000km 1000km 1000km 1000km 1000km 6h
Bruce Jennings/ Bob Beasley #77, 10th (5th)
Total points
1
1
Statistics
Works Starts/finishes 1/1 1/1

Results in WRC

Races

Season

930/02 engine
Entry Rally event
Driver
Codriver
Team MC SVE
Entry list
POR KEN GRE MAR FIN S.R TdC RAC
Walter Heinz Schewe
Franz-Josef Moorman
Frawitt KG Hermann Hearman dnf
Peter Brink
Erhard Ricken
dnf
Rolf Peterson
Hans-Jurgen Wachholz
MSC Nordmark Kiel dnf
Statistics
Others starts/finishes 3/0 3/0

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
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