Porsche 911 S/T group 4 (1970)
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Home » Racing Sports Cars » Porsche 911S/T

Porsche-911-ST-2.5-63333.jpg Source

Chassis numbers here and here
Porsche 915 transmission here and here

Specifications

Production numbers
6 units built in 1969 with a high butterfly engine
15 cars were built in 1970 with carburetor 2247cc engine
6 cars were built in 1971 with a injection 2380cc engine
23 cars (3 factory and 20 customers) were built in 1972 with a high butterfly 2.5L engine

Click here and here
Click here and here and here for S 2.2
Click here for E 2.2
Click here for E 2.4
Click here and here and here for S 2.4
Click here and here and here for S/T

Production engines

Type C/D
Homologation number 3005 3011 3025
Homologation start 1/1/1970 1/4/1970
Homologation end 31/12/1970 31/12/1978
Model 911S type C 911E type D 911T type D 911S type D
Engine Type 911/02 911/01 911/03 911/02
Displacement 84.0 mm x 66.0 mm, 2195 cc
Compression 9.8:1 9.1:1 8.6:1 9.8:1
Valves I46, E40
Aspiration Bosch Kugelfischer MFI 2 x Zenith 40 TIN carburetors Bosch Kugelfischer MFI
Power output 177 BHP (130 KW) @ 6500 RPM 155 bhp (116 kW) @ 6200 rpm 125 bhp (94 kW) @ 5800 rpm 180 BHP (132 KW) @ 6500 RPM
Torque 199 Nm (147 Ft-Lbs) @ 5200 rpm 191 Nm (141 ft·lb) @ 4500 rpm 176 Nm (130 ft·lb) @ 4200 rpm 199 Nm (147 Ft-Lbs) @ 5200 rpm
Type E/F
Homologation number 3011, 2/2E 3025, 4/2E
Homologation start 1/11/1971 1/1/1972
Model 911T type E 911E type E 911S type E
Engine Type 911/51 911/52 911/53
Displacement 84.0 mm x 70.4 mm, 2341 cc
Compression 7.5:1 8.0:1 8.5:1
Valves I46, E40
Aspiration 2 x Zenith 40 TIN carburetors Bosch Kugelfischer MFI
Power output 130 HP @ 5600 rpm 165 HP @ 6200 rpm 190 bhp (142 kW) @ 6500 rpm
Torque 194 Nm (144 ft·lb) @ 4000 rpm 205 Nm (151 ft·lb) @ 4500 rpm 215 Nm (158 ft lbs) @ 4000 rpm

Racing engines

Analytical specifications and drawings

B6 (180o) cylinder
2247cc capacity
SOHC, 2 valves/cyl - 12 valves total
aspiration, natural with Bosch "pulsed injection" D-Jetronic mechanical Fuel Injection system using Kugelfischer PL Injection pump. Click here and here
Power output
230 hp @ 7800 rpm
170 lb/ft @ 6200 rpm

Other specifications

Transmission
Type rear wheel drive Porsche Type 911/01, Porsche/ZF 915 here and here (Tutorial 1, Tutorial 2), 4 or 5 speed manual gearbox
Gearbox ratios Fitted to all models:
1st: 3.091/1 (34/11)
2nd: 1.778/1 (32/18)
3rd: 1.217/1 (28/23)
4th: 0.926/1 (25/27)
5th: 0.759/1 (22/29)
R: 3.127/1 (16/11 x 43/20)
Not fitted to #3005:
1st: 2.643/1 (37/14)
2nd: 1.600/1 (32/20)
3rd: 1.318/1 (29/22)
4th: 1.080/1 (27/25)
5th: 0.926/1 (25/27)
R: 2.38/1 (17/15 x 42/20)
Not fitted to #3005:
1st: 2.400/1 (36/15)
2nd: 1.550/1 (31/20)
3rd: 1.217/1 (27/24)
4th: 0.858/1 (24/28)
R: 2.38/1 (17/15 x 42/20)
915/35 (11/1971+):
1st: 3.182/1 (35/11)
2nd: 1.778/1 (32/18)
3rd: 1.125/1 (27/24)
4th: 0.821/1 (23/28)
R: 3.325/1 (21/12 x 38/20)
915/35 (11/1971+):
1st: 3.182/1 (35/11)
2nd: 1.834/1 (33/18)
3rd: 1.261/1 (29/23)
4th: 0.962/1 (25/26)
5th: 0.759/1 (22/29)
R: 3.325/1 (21/12 x 38/20)
Diffrential ratio 4.428/1 (31/7), 4.833/1 (29/6),
3011: previous 2 plus 3.857/1 (27/7), 5.333/1 (32/6)
ZF or Getrag 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. Group 4: extended wheel arches
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 (911E 3.1) 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 with servo
Dimensions
length: 4.080 m (156.7"), 911E: 4.163 mm (163.9") width: 1.610 m (63.4"), group 4: +100 mm height: 1.320 m (52.0")
wheelbase: 2.268 m (89.3")
11/1971 2/2E, Type F: 2.271 m (89.4")
front track: 1.374 m (54.7")
11/1971 2/2E, Type F: 1.372 m (54"),
S/T: 1402 mm (55.2")
rear track: 1.355 m (53.3")
11/1971 2/2E, Type F: 1.354 m (53.3"),
S/T: 1421 mm (55.9")
Rims - tires 6 x 15", S/T: front, 7 x 15", rear 9 x 15" 185/70 VR 15", S/T: front/rear, 4.75/10 - 15" / 4.30/11.6 - 15"
Weight 960-1000 kg, f/r distribution 43% / 57%
Weight/power 4.8 kg/HP
Fuel tank 62 lt, group 4: 80 or 110 lt

Results in WSCC

Season
Group 4 classification is noted in brackets
Car entry, chassis number Car number/ result
Dayt Sebring Brands Hatch Monza Targa Florio Spa Nurb Le Man Watkins Glen Zeltweg
Team 24h 12h 1000km 1000km 1000km 1000km 24h 6h 1000km
Porsche Club Romand (911/02) #44, in entry list
Porsche Club Romand (911/20) #75, acci dent in practice #86, 44th #59, 16th (1st) #83, 25th (10th) #65, gear lever #42, dnf
Rey Racing (911/20) #54, eng ine #63, acci dent #40, in entry list
Giancarlo Rondanini (911/20) #70, 22nd (3rd) #84, dns #47, dnf
Racing Team AAW, 911 030 1014 (911/20) #71, in entry list #79, 14th (1st) #51, in entry list
Jean Égreteaud, 911 030 0279 (911/22) #72, in entry list #80, in entry list #59, eng ine
Auto Kremer (911/20) #73, eng ine #53, 18th (2nd) #84, 15th (2nd) #47, 7th (2nd)* #46, 19th (6th)
Hans-Dieter Weigel/ Reinhardt Stenzel #74, in entry list #74, in entry list
André Wicky Racing Team (911/02) #76, eng ine #41, gear box
Patrice Sanson/ J. Claude Peramone (911/02) #82, 28th (10th)
Oldenkott Pipe and Tobacco Racing (911/20) #72, in entry list #85, 16th (3rd) #44, dnf * *
Jean-Pierre Gaban/ Willy Braillard (911/02) #43, gear box
Claude Laurent/ Jacques Marché, 02 (911/02) #45, OTL
Philippe Farjon #50, in entry list
Dieter Fröhlich (911/20) #51, dns
Automobile Club Ile de France #52, in entry list
René Mazzia/ Pierre Mauroy, 119 300 932 (911/02) #62, OTL
Valvoline Racing Team #45, disqua lified
Stuttgart Sports Car Club #50, dnf
Kurt Simonsen #55, dnf
Total points
4
4
Statistics
Starts/finishes 29/11 4/1 3/2 3/2 4/4 8/1 7/1
Driver Team entries and car number
Racing Team AAW
Dieter Fröhlich 71 79 51
Pauli Toivonen 71 79 51
Giancarlo Rondanini
Giancarlo Rondanini 70 84
Ennio Bonomelli 70 47
Mario Ilotte 84
Fiorenzo Genta 47
Auto Kremer / Ecurie Luxembourg
Erwin Kremer 73 53 84 47
Willy Kauhsen 73
Karl von Wendt 53
Günther Huber 84
Nicolas Koob 47
Porsche Club Romand
Claude Haldi 44 75 86 59 83 65 42
Jean Sage 44
"Mirage" 75 86
Bernard Cheneviere 76 59 63 42
Eric Chapuis 83
Arthur Blank 65
Jean Égreteaud
Jean Égreteaud 72 80 59
Marc Etchebers 72 80
Jean Mésange 59
André Wicky Racing Team
Sylvain Garant 76 41
Jean Mésange 41
Rey Racing
Jacques Rey 54 63 40
Edgar Berney 54
Jean-Marie Jacquemin 40
Oldenkott Pipe and Tobacco Racing / Peter Kersten
Clemens Schickentanz 72 85 44
Rhuben 72
Hans-Joachim Stuck 85
Werner Zanders 44
Automobile Club Ile de France
Jean-Claude Lagniez 52
Raymond Touroul 52
Valvoline Racing Team
Georg Koltay 45
Hub Hoffmann 45
Stuttgart Sports Car Club
Peter Kaiser 50
Heinz Blind 50
Kurt Simonsen
Bengt Ekberg 55
Roland Larsson 55

*Ecurie Luxembourg entry
**Peter Kersten entry


Results in WRC

Races

Works team: Porsche System Engineering
Season
Entry Rally event
Driver
Codriver
Team M.C SVE
Entry list
S.R KEN A GRE RAC
entry list
Björn Waldegård 2247
Lars Helmér
911 030 0001
works 1st
Björn Waldegård 2247
Lars Nyström
911 030 0003
works 1st
Åke Andersson 2247
Bo Thorszelius
911 030 0003
works connecting rod gear box
Åke Andersson 2247
Bo Thorszelius
911 030 0950
works 4th wheel bearing
Åke Andersson 2247
Bo Thorszelius
911 030 1127
works eng ine
Björn Waldegård 2247
Lars Helmér/ Lars Nyström
works 1st connecting rod gear box
Gérard Larrousse 2247
Mike Wood
911 030 0002
works 2nd
Gérard Larrousse 2247
Mike Wood
911 030 0949
works dnf
Gérard Larrousse 2247
Mike Wood
works 6th
Hans-Joachim Walter 2247
Horst Rack
12th
Jerry Larsson
Lars Lundblad
5th gear box
Sobiesław Zasada
Marek Wachowski
119 30 530
dnf
Klaus Russling
Eggenberger
ARBO MSC Seeboden 10th
Walter Surtmann (T)
Fritz Schmiedt
Hella Racing Team 16th
Walter Pöltinger
Johan-Hans Hartinger
Bosch Racing Team Wien acci dent
Dan Margulies
Kevin Gormley
?
Total points
()
58 26 16 11 5
Statistics
Others starts/finishes 20/10 4/4 3/2 1/0 5/3 3/0 4/1

Svenska VW AB entries for Swedish and Austrian rallies


911S-70Monte.jpg Source
Gérard Larrousse in Monte Carlo '70
6b4d83a33817.jpg Source
Åke Andersson in Swedish rally '71
Porsche_911,_Dieter_Fr%C3%B6hlich_am_31.05.1970.jpg Source
Nürburgring '70
4174_3_0_0.JPG Source
Nurburgring '71
70-Porsche_911S_DV_08_AI_01.jpg Source
Daytona '72
15468157877_c8b0616e6f_b.jpg Source
S 2.4
Porsche_911_S_2.4_Urmodell_1971-1973_0000_frontright_2010-03-27_A.jpg Source
S 2.4 street version
dsc_0333.jpg Source

Drawings

porsche_911_t_coupe_rallye_2.jpg Source

Electrics

242376d1198888017-which-bentley-manual-for-72-911t-1972-911-wiring-diagram-part-1.jpg Source
242377d1198888044-which-bentley-manual-for-72-911t-1972-911-wiring-diagram-part-2.jpg Source
242378d1198888065-which-bentley-manual-for-72-911t-1972-911-wiring-diagram-key.jpg Source
242379d1198888086-which-bentley-manual-for-72-911t-1972-911-wiring-diagram-key-2.jpg Source
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