Porsche 911 Carrera RS Type F/G group 4 (1973)

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Table of Contents
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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 |
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911/83 Engine | |||
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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 |
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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") |
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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 | |||
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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 |
Results in WSCC
Season
Group 4 classification is noted in brackets
Type F chassis with 911/83 engine
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
911/83 engine, Type F chassis
Entry | Rally event | ||||||||||||||
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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

Gedehem in Tour de Corse '73

Leo Kinnunen in 1000 Lakes Rally 1973

Leo Kinnunen in 1000 Lakes rally '73

Sobieslaw Zasada in Press-on-Regardless '74

Björn Waldegard in Safari rally '74

Jacques Almeras with Type G 3.0 in Tour de Corse '77

Type G Carrera RS 3.0 '74
Drawings



Engine

Electric diagrams




page revision: 334, last edited: 23 Sep 2021 21:22