Porsche 911 RSR Type F group 4 (1973)
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Home » Racing Sports Cars » Porsche 911 RSR Type F

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Chassis numbers here and here and here and here
Porsche 915 transmission here and here
RSR = Rennsport Racing (Race Sport Racing)

Specifications

49 units built RSR
215 units built RS
Click here
Click here and here and here
Click here for RS 2.7 Type F '73 street version

Homologation number: 637
Homologation start: 1/1/1973

Type Porsche Type 911/72, boxer 6 cyl (180o), 4 stroke, petrol engine located longitudinally behind rear axle
Capacity 2808cc
Bore x Stroke (mm) 92.0 x 70.4 mm
Compression ratio 10.3:1
Output power - torgue 308 bhp / 230 KW @ 8000 rpm 290 Nm / 214 ft lbs @ 6300 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 915 (Tutorial 1, Tutorial 2), 5 speed gearbox
Gearbox ratios 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
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 Type F/G chassis. 2 door coupe steel bodyshell with steel bumpers
Front suspension mc pherson strut with lower L wishbone, coil springs, Bilstein telescopic gas shock absorber and anti-roll bar 15mm diameter
Rear suspension trailing arm with torsion bars, Bilstein telescopic gas shock absorber and anti-roll bar 15mm diameter
Steering system rack and pinion
Brakes ventilated disks all around. Ventilated calipers front and rear dual circuit with servo
Dimensions
length: 4,128 mm (162.5 in) width: 1,651 mm (65 in) height: 1,321 mm (52 in)
wheelbase: 2,272 mm (89.4 in) front track: 1,402 mm (55.2 in) rear track: 1,422 mm (56 in)
Rims - tires 9 x 15" / 11 x 15" 230/600 - 15" / 260/600 - 15"
Weight 850-900 kg, f/r distribution 43% / 57%
Fuel tank 110 lt

Results in WSCC

Season
Group 4 classification is noted in brackets
911/72 engine for RSR
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 #76, in entry list #9, in entry list
Penske Racing, 911 360 0307 R3 Group 5 #6, eng ine Holbert's Porsche-Audi
Holbert's Porsche-Audi, 911 360 0307 R3 Penske Racing #14, suspe nsion
Porsche Club Romand, 911 360 0960 #28, 11th (3rd) #88, 9th (2nd) #53, 11th (4th) #48, eng ine #75, dnt qualify
Porsche Club Romand, 911 360 0659 #32, clutch pedal #44, gear box
Porsche Club Romand, 911 360 0659 (911/83R) #113, 8th (2nd)
Porsche Kremer Racing, 911 360 0610 #27, 10th (2nd) #85, 12th (3rd)
Porsche Kremer Racing, 911 360 0610 (911/83R) #47, eng ine #55, 11th (3rd)
Porsche Kremer Racing, 911 360 0885 #84, 8th (1st) #46, 14th (6th) #54, 12th (4th) #45, 8th (2nd)
Porsche Kremer Racing #56, in entry list
Rallye Gemeinschaft Ulm #83, dnt qualify #52, dnf
Crowne Racing, 911 360 0185 #86, dnt qualify #77, in entry list
Sepp Greger #87, in entry list
Ennio Bonomelli, 911 360 1159 #92, OTL #81, in entry list
Wicky Racing Team #93, in entry list #32, in entry list
Gelo Racing, 911 360 0847 #45, in entry list #63, 10th (4th)
Gelo Racing, 911 360 0847 (911/83R) #59, 13th (5th)
Scuderia Brescia Corse (911/83R) #106, 7th (1st)
Scuderia Brescia Corse #79, in entry list
Max Moritz Racing Team, 911 360 0636 (911/83R) #112, dnf
Max Moritz Racing Team, 911 360 0636 #43, acci dent
Toni Fischhaber/ Leopold von Bayern (911/83R) #49, 14th (6th)
Team Kubero Racing, 911 360 1045 #50, 15th (7th)
Team Europa-Möbel (911/83R) #52, 16th (8th)
Hanspeter Ziegler/ Bernd Ziegler, 911 360 1183 #53, eng ine in practice
M. Weissmann, Vorhangschienen-Fabrik, 911 360 0921 #58, dns
Juan Carlos Bolanos/ Carlo M. Nicastro, 911 360 1099 (911/83R) #60, dnf
Schiller Racing Team #41, 16th (9th)
René Mazzia #42, 17th (10th)
Jean Egreteaud/ Jean-Claude Lagniez, 911 360 1196 #49, axle
Escuderia Montjuich #64, in entry list
Jean Sage #78, head gasket
Toad Hall Motor Racing, 911 360 0755 #16, 8th (3rd)
Gregg Loomis/ Pete Harrison #65, gear box
Bob Harmon Racing, 911 360 0601 #70, brakes
Silverstone Enterprises #76, dns
"Gedehem" #77, in entry list
Pharr West Racing, 911 360 0756 #81, 11th (4th)
Kauhsen Racing Team #82, in entry list
Nicolas Koob #83, in entry list
Louis Meznarie #84, dnt qualify
Total points
20
1 5 7 4 3
Statistics
Works Starts/finishes 43/21 1/0 1/0 2/2 6/3 4/2 3/2 10/6 10/4 6/2
Penske Racing
Mark Donohue 6
George Follmer 6
Holbert's Porsche-Audi
Al Holbert 14
John McComb 14
Porsche Club Romand
Bernard Cheneviere 32 28 88 53
Peter Zbinden 32 28 88 113 48 44
Mario Ilotte 113
Serge Bolomey 48
Klaus Fritzinger 48, 58
Jean-François Piot 44
Pierre Greub 75
Porsche Kremer Racing
John Fitzpatrick 27 85 46, 47
Paul Keller 27 85 47 54, 55 45, 75
Clemens Schickentanz 84 46 54, 55 45, 82
Erwin Kremer 84 45
Jürgen Neuhaus 55
Rallye Gemeinschaft Ulm / Team Europa-Möbel
Eberhard Sindel 83 52 52
Wilhelm Siegle 83 52 52
Ennio Bonomelli
Ennio Bonomelli 92 81
Teodoro Zeccoli 92
Pino Pica 81
Giorgio Pianta 81
Crowne Racing
Chris Craft 86 77
Martin Birrane 86 77
Wicky Racing Team
Philippe Carron 93
Jean-Pierre Aeschlimann 93
André Wicky 32
Pierre-François Rousselot 32
Gérard Foucault 32
Gelo Racing
Georg Loos 45 59 63
Jürgen Barth 59 63
Scuderia Brescia Corse
Giovanni Borri 106
Mario Barone 106
Enrico Pasolini 79
"Pooky" 79
Max Moritz Racing Team
Gerd Quist 112 43
Jürgen Zink 112 43
Manfred Laub 43
Team Kubero Racing
Bengt Ekberg 50
Kurt Simonsen 50
Roland Larsson 50
Schiller Racing Team
Jean Selz 41
Florian Vetsch 41
René Mazzia
Pierre Mauroy 42
Marcel Mignot 42
Escuderia Montjuich
Roger Clark 64
José Juncadella 64
Peter Hanson 64
Jean Sage
Hervé Bayard 78
René Ligonnet 78
Louis Meznarie
Jean-Claude Boucher 84
Daniel Guerin 84
Didier Jaunet 84
Toad Hall Motor Racing
Michael Keyser 16
Milt Minter 16, 70
Silverstone Enterprises
Mike Downs 76
John Kelly 76
Bob Harmon Racing
Bob Harmon 70
Pharr West Racing
Grey Egerton 81
Elliot Forbes-Robinson 81

1973-Porsche-911-RSR1.jpg Source
Daytona '73
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Drawings

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Electric diagrams

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