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

1970_Porsche_911_%28_901_%29_L_2.3_ST_coup%C3%A9_002_3523.jpg Source

Chassis numbers here and here and here
Porsche 915 transmission here and here

Specifications

6 units built in 1969 with a hight butterly 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 hight 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 and here and here and here for S/T

Type C/D
Homologation number 3005 3011 3025
Homologation start 1/1/1970 1/4/1970
Model 911S type C 911T type D 911E type D 911S type D
Engine Type 911/02 911/03 911/01 911/02
Displacement 2195
Compression 9.8:1 8.6:1 9.1:1 9.8:1
Valves I46, E40
Aspiration Bosch Kugelfischer MFI 2 x Weber 40 IDT 3C carburettors Bosch Kugelfischer MFI
Power output 177 BHP (130 KW) @ 6500 RPM 123 bhp (92 kW) @ 5800 rpm 153 bhp (114 kW) @ 6200 rpm 177 BHP (130 KW) @ 6500 RPM
Torque 199 Nm (147 Ft-Lbs) @ 5200 rpm 176 Nm (130 ft·lb) @ 4200 rpm 191 Nm (141 ft·lb) @ 4500 rpm 199 Nm (147 Ft-Lbs) @ 5200 rpm
Type E/F
Homologation number 3011 3025 3011
Homologation start 1/1/1972
Model 911T type E 911E type E 911S type E 911T type E
Engine Type 911/51 911/52 911/53 911/57
Displacement 2341
Compression 7.5:1 8.0:1 8.5:1 7.5:1
Valves I46, E40
Aspiration Bosch Kugelfischer MFI 2 x Zenith 40 TIN carburetors
Power output 140 HP @ 5600 rpm 165 HP @ 6200 rpm 190 bhp (142 kW) @ 6500 rpm 130 HP @ 5600 rpm
Torque 200 Nm (148 ft·lb) @ 4000 rpm 205 Nm (151 ft·lb) @ 4500 rpm 215 Nm (158 ft lbs) @ 4000 rpm 194 Nm (144 ft·lb) @ 4000 rpm

Injection pump Calibration sheets

Type Porsche Type 911/20, boxer 6 cyl (180o), 4 stroke, petrol engine located longitudinally behind rear axle
Capacity 2247cc
Bore x Stroke (mm) 85.0 x 66.0
Compression ratio 10.3:1
Output power - torgue 230hp @ 7800rpm 170 lb/ft @6200rpm
Main bearings forged steel crankshaft with 8 plain main bearings 57mm diameter, 57mm big end journal diameter titanium connecting rods, 130mm distance center to center, 61mm big end bearing diameter
Materials block: magnesium alloy, 124.5mm bore spacing cylinderhead: aluminium alloy
Cams/valves 2 x 1 overhead camshafts (SOHC), chain driven 2 valves/cyl. - 12 valves total. 46mm inlet valve diameter, 40mm 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, firing order 1-6-2-4-3-5
Cooling system aircooled
Lubrication system dry sump with 1 oil cooler 11 lt
23058223_Type911SRallye_21222041425.jpg Source
Transmission
Type rear wheel drive Porsche Type 911/01, Porsche 915 (Tutorial 1, Tutorial 2), 5 speed gearbox
Gearbox ratios 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)
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: 3.127/1 (16/11 x 43/20)
915 (1972+) for 2.4 lt:
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
915 (1972+) for 2.4 lt:
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
Diffrential ratio 4.428/1 (31/7), 3.857/1 (27/7), 5.286/1 (37/7) 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: 4.163 m (163.9") width: 1.610 m (63.4") height: 1.320 m (52.0")
wheelbase: 2.268 m (89.3") front track: 1.378 m (54.3") rear track: 1.359 m (53.5")
Rims - tires 6 x 15" 185/70 VR 15"
Weight 960 kg, f/r distribution 43% / 57%
Weight/power 4.8 kg/HP
Fuel tank 62 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 (911/20) #44, in entry list #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
Dieter Fröhlich/ Pauli Toivonen (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 #76, eng ine #51, dns
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
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
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/ Lars Nyström
works 1st 1st 1st connecting rod gear box
Åke Andersson 2247
Bo Thorszelius
works 4th wheel bearing eng ine connecting rod gear box
Gérard Larrousse 2247
Mike Wood
works 2nd 6th
Hans-Joachim Walter
Horst Rack
12th
Jerry Larsson
Lars Lundblad
5th gear box
Sobiesław Zasada
Marek Wachowski
dnf
Klaus Russling
Eggenberger
ARBO MSC Seeboden 10th
Surtmann Walter (T)
Schmiedt Fritz
Hella Racing Team 16th
Pöltinger Walter
Hartinger Johan-Hans
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 2/0 5/1

Works in Rally Sweden: Svenska VW AB


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
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Zeltweg '71
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Nurburgring '71
70-Porsche_911S_DV_08_AI_01.jpg Source
Daytona '72
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S 2.4
Porsche_911_S_2.4_Urmodell_1971-1973_0000_frontright_2010-03-27_A.jpg Source
S 2.4 street version
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Drawings

porsche_911_t_coupe_rallye_2.jpg Source

Engine

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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
Schematic+view+of+the+Porsche+MFI+system1235690811.jpg Source
Injection%2BPump%2BPost%2B1970%2B1201286868.jpg Source
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