Porsche 911 RSR Type F group 4 (1973)

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Source

Table of Contents

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

Specifications

57 units built, 8 works and 49 customer cars, all converted from Porsche 911 RS 2.7

Click here
Click here and here and here
Click here for RS 2.7 Type F '73 street version

Homologation number: 3053
Homologation start: 1/7/1973

Type	Porsche Type 911/72, boxer 6 cyl (180^o), 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

drag coefficient, 0.43
frontal area, 1.91 m²

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, 911 360 0576 R5 (911/83R)					#40, 10th (3rd)
Martini Racing Team/ Porsche Stuttgart, 911 360 0576 R5		#8, 8th (2nd)	#26, 9th (1st)				#66, acci dent
Martini Racing Team/ Porsche Stuttgart, 911 360 0588 R6		#9, 7th (1st)
Martini Racing Team/ Porsche Stuttgart, 911 230 0841 -> 911 360 0002 (911/83R)						#107, 6th
Martini Racing Team/ Porsche Stuttgart, 911 360 0686 R7 (911/83R)						#108, acci dent in practice
Porsche Stuttgart/ Sonauto BP Racing, 911 360 0020 R2								#48, 14th (8th)
Martini Racing Team/ Porsche Stuttgart								#76, in entry list	#9, in entry list
Holbert's Porsche-Audi, 911 360 0307 R3										#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
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
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 36		7	3	5	1	13		4		3
Statistics
Works Starts/finishes 48/25		3/2	3/3	6/3	5/3	5/3	9/4	11/5		6/2
Martini Racing Team/ Porsche Stuttgart
Gijs van Lennep		8	26
Herbert Müller		8	26
George Follmer		9			40		66		9
Willy Kauhsen		9					66
Reinhold Jöst					40
Günter Steckkönig						107, 108
Giulio Pucci						107, 108
Claude Haldi								48
Helmuth Koinigg								48
Arthur Blank								76
Porsche Sonauto BP Racing
Peter Gregg								48
Guy Chasseuil								48
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
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

Car entry	Car number/ result
	Mugello	Valle lunga	Silver stone	Nurb	Zeltweg	Watkins Glen	Dijon
Team	6h	6h	6h	1000km	6h	6h	6h

John Cooper/ Nick Faure (911/72)			#37, timing chain
Mike Tillson/ Dieter Oest (911/75)						#72, 14th

Statistics
Works Starts/finishes 2/1			1/0			1/1

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Drawings

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Electric diagrams

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page revision: 275, last edited: 20 Mar 2020 20:00

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Type	Porsche Type 911/74, boxer 6 cyl (180^o), 4 stroke, petrol engine	located longitudinally behind rear axle
Capacity	2996cc
Bore x Stroke (mm)	95.0 x 70.4 mm
Compression ratio	10.5:1
Output power - torgue	315hp @ 8000rpm	313 Nm / 231 ft lbs @ 6500 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	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

Racing Cars

Specifications

Results in WSCC

Drawings

Electric diagrams