Porsche 911 Carrera RS Type F/G group 4 (1973)
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Chassis numbers here and here and here

Specifications

1973 RS 2.7: 1590 units built, 8 (works) and 49 (customer) were converted to Porsche 911 RSR Type F
1974 RS 3.0: 123 units built, 5 were converted to works Porsche 911 RSR Turbo, and 51 were converted to customer Porsche 911 RSR Type G
1976-1977 Carrera 3.0: 3687 units built. 2564 coupés and 1123 Targas

Click here
Click here for Type G 3.0

Group/Class 4/4 Homologation number: 637 and 3053
Years active 1973 - 1977 Homologation start: 1/1/1973 and 1/7/1973
Homologation end: 1/7/1973 and 31/12/1979
911/83 Engine
Type Porsche 911/83, H6 cyl (180o), 4 stroke, petrol engine located longitudinally behind rear axle
Capacity 2687cc WRC: 2687 cc
Bore x Stroke (mm) 90.0 x 70.4 mm
Compression ratio 8.5:1, 10.0:1
Output power - torgue 210 HP @ 6300 rpm 26 kgm (255 Nm) / 5100 rpm
Main bearings 42CrMo4 or CK45 crankshaft with 8 main bearings 56mm diameter connecting rod length distance center to center 127.75 mm. Forged aluminium alloy piston with 39.1mm piston compression height
Materials block: aluminium alloy or magnesium alloy with nikasil cylinder liners with cooling fins, 118 mm bore spacing cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers and cooling fins
Cams/valves 2 x 1 overhead camshafts (SOHC), chain driven 2 valves/cyl. - 12 valves total. 46mm inlet valve diameter, 40mm exhaust valve diameter. 2 coil springs per valve
Aspiration natural, Bosch Kugelfisher multipoint mechanical fuel injection
Ignition electronic, 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. 3 lt SAE 90 transmission oil capacity
Gearbox ratios 915/08
1st: 3.182 (35/11)
2nd: 1.834 (33/18)
3rd: 1.126 (29/23)
4th: 0.926 (25/27)
5th: 0.724 (21/29)
R: 3.325/1 (21/12 x 38/20)		 1st: 3.182 (35/11)
2nd: 2.187 (35/16)
3rd: 1.600 (32/20)
4th: 1.126 (29/23)
5th: 1.000 (26/26)
R: 3.325/1 (21/12 x 38/20)		 1976+:
1st: 2.400 (36/15)
2nd: 1.684 (32/19)
3rd: 1.318 (29/22)
4th: 1.080 (27/25)
5th: 0.889 (24/27)
R: 3.325/1 (21/12 x 38/20)
Diffrential ratio 4.428/1 (31/7), 5.286/1 (37/7).
1976+: 3.875/1 (31/8), 4.375/1 (35/8)		 spiral bevel gears limited slip rear differential
Clutch dry single disk 225mm diameter
Chassis-body
Type steel monocoque 911 Type F 911 360 chassis. 2 door coupe steel bodyshell with steel bumpers and "ducktal" rear spoiler. group 4: extended wheel arches.
1974: Type G chassis with front "impact" bumpers and "ducktail" rear spoiler.
1975: Type H chassis with front "impact" bumpers and "flat" rear spoiler
Front suspension mc pherson strut with lower L wishbone, longitudinal torsion bars, telescopic gas shock absorber and anti-roll bar 17/19/21/28/35mm diameter
Rear suspension trailing arm with torsion bars, telescopic gas shock absorber and anti-roll bar 17/19/21/28/35mm 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 dual circuit (no servo)
Dimensions
length: 4.102 m (161.5") width: 1.652 m (65.0"), group 4: +100mm height: 1.320 m (52.0")
wheelbase: 2.271 m (89.3") front track: 1.372 m (54.0")
1.437m (55.6")		 rear track: 1.404 m (55.3")
1.462m (57.6")
Rims - tires front 6J x 15", rear 7J x 15". Group 4: 7 - 8 x 15". 1974+: front 8x15", rear 9x15" front: 165 VR 15", rear: 185/70 VR 15". 1974+: front 215/60 VR15", rear 235/60 VR15"
Weight 900 - 1000 kg
Fuel tank 85 lt. Group 4: 62, 100, 110 or 120 lt

1974 3.0 lt engine

911/77 Engine
Type Porsche 911/77, H6 cyl (180o), 4 stroke, petrol engine. located longitudinally behind rear axle
Capacity 2992.55cc WRC: 2992.55cc
Bore x Stroke (mm) 95 x 70.4mm
Compression ratio 9.8:1
Output power - torgue 230 HP @ 6200 rpm 28 kgm (275 Nm) @ 5000 rpm
Main bearings 42CrMo4 or CK45 crankshaft with 8 main bearings 56mm diameter connecting rod length distance center to center 127.75 mm. Forged aluminium alloy piston with 39.1mm piston compression height
Materials block: aluminium alloy or magnesium alloy with nikasil cylinder liners with cooling fins, 118 mm bore spacing cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers and cooling fins
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. 2 coil springs per valve
Aspiration natural, Bosch Kugelfisher multipoint mechanical fuel injection
Ignition electronic, 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

Torque settings

Results in WSCC

Season
Group 4 classification is noted in brackets
Type F chassis with 911/83 engine
Car entry, chassis number Car number/ result
Dayt Vallel Dijon Monza Spa Targa Florio Nurb Le Man Zeltweg Watkins Glen
Team 24h 6h 1000km 1000km 1000km 1000km 24h 1000km 6h
Martini Racing Team/ Porsche Stuttgart #T, spare car
Anton Fischhaber #89, in entry list
Victor Blanc #91, in entry list
Comstock #110, 18th (7th)
Samson Kremer Team (Carrera) #57, in entry list
Boeri Racing #62, in entry list
Ecurie Escargot (911/83R) #43, 12th (5th)
Statistics
Works Starts/finishes 2/2 1/1 1/1
Comstock
Andrew Hedges 110
Dan Margulies 110
Boeri Racing
Ernst Kraus 62
Ecurie Escargot
Dave Helmick 43
John O'Steen 43

Results in WRC

Works team: Porsche System Engineering

Season

911/83 engine, Type F chassis
Entry Rally event
Driver
Codriver		 Team M.C SVE POR KEN MAR GRE POL FIN A S.R USA RAC
Entry list		 TdC
Sobiesław Zasada
Marian Bień
911 360 1053		 works gear box
Björn Waldegård
Hans Thorszelius		 works eng ine
Américo Nunes
António Morais		 VIP 5th
Leo Kinnunen
Atso Aho		 MCS / Racing Team AAW 3rd
Klaus Russling
Wolfgang Weiss		 7th
Harold Morley
Bob Lindquist		 Crystal Rally Sport - Hull 22nd
Jack Tordoff
Phil Short		 Ziebart Rustproofing dnf
Malcolm Harvey Ross
C. L. Newman		 dnf
Marek Gierowski
John Taylor		 dnf
Brian Evans
David Marston		 Express TV Services of Malvern dnf
Gedehem
Vincent Laverne		 8th*
Total points
()		 21 6 8 4 3
Statistics
Others starts/finishes 11/5 1/1 2/0 1/1 1/1 5/1 1/1

*Group 3 entries

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Gedehem in Tour de Corse '73
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Leo Kinnunen in 1000 Lakes Rally 1973
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Leo Kinnunen in 1000 Lakes rally '73
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Sobieslaw Zasada in Press-on-Regardless '74
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Björn Waldegard in Safari rally '74
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Jacques Almeras with Type G 3.0 in Tour de Corse '77
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Type G Carrera RS 3.0 '74

Drawings

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Engine

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Electric diagrams

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1973+911+MFI+Wiring+diagram+Part+II+Small+1200782732.jpg Source
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page revision: 334, last edited: 23 Sep 2021 21:22
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