1971 24 Hours of Le Mans

1971 24 Hours of Le Mans
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The 1971 24 Hours of Le Mans was the 39th Grand Prix of Endurance, and took place on 12 and 13 June 1971. It was the ninth round of the 1971 International Championship for Makes.

Pre-race

At the end of the 1970 season, Ferrari had entered a new version of the 512 in some races, the 512M (Modificata). The 512M had a new bodywork built on the same aerodynamics doctrine of the Porsche 917K. During the 1971 season, the FIA decided to eliminate the Sport category for 1972, so the big 917s and 512s would have to retire at the end of a year. Ferrari decided to give up any official effort with the 512 in order to prepare the new 312PB for 1972, but many 512s were still raced by private teams and most of them converted to M specification.

Roger Penske bought a used 512M chassis that was totally dismantled and rebuilt. The car was specially tuned for long races receiving many unique features, among them were a large rear wing and an aviation inspired quick refueling system. The engine was tuned by Can-Am V8 specialist Traco; this engine was probably able to deliver more than 600 hp (450 kW). As of today it's impossible to know to what extent Penske's initiative was backed by Ferrari works. This 512 M, painted in a blue and yellow livery, was sponsored by Sunoco and the Californian Ferrari dealer Kirk F. White. This car made the pole position for the 24 Hours of Daytona and finished second despite an accident. For the 12 Hours of Sebring the Sunoco 512 won the pole, but finished the race in sixth position after making contact with Pedro Rodríguez's 917. Despite this misfortune, the car had proved to be a serious opponent for the 917. Not only this car was the fastest on track in Daytona and Sebring but it was also the car that had the shortest refueling time.

The presence of the Sunoco 512M forced Porsche to pursue his effort of research and development on the 917.^[1] The 917K tail was modified, and the 917 LH aerodynamics received further improvements. New magnesium chassis were developed. An entirely new car, the 917/20 was built as test-bed for future Can-Am parts and aerodynamic low-drag concepts. The chunky car was painted in pink for the race with names of pieces of meat written across it, earning it the nickname "Pink Pig". During the 1970-71 race period the 917 won 14 of the 21 races it entered and achieved second place in two of those races.

A modified Ferrari 512 featuring a narrowed cockpit (built around a Porsche 917 windshield) was entered by Scuderia Filipinetti, for Mike Parkes and Henri Pescarolo. The car was christened 512F.

Matra entered only one 660 for Chris Amon and Jean-Pierre Beltoise.

The Ford-Cosworth DFV made its Le Mans debut in Guy Ligier's new JS-3. The engine was limited to 8800 rpm, allowing around 400 hp (300 kW).

Race

The 1971 Le Mans race was the first race to start using the safer rolling start method (the "Indianapolis start"), rather than the "Le Mans start" method that had been used in previous Le Mans races, and continues that way now.^[2] Despite the much-vaunted speed of the Porsches, the ACO speedtrap clocked a Ferrari at 359 km/h (222.6 mph), the highest speed reached by any car in qualifying. This would be eclipsed during the race when a Porsche was timed at 362 km/h (224.4 mph).^[3] The fastest qualifying lap however, was recorded by the Rodriguez/Oliver 917LH at 3:13.9. Long-tail Porsches occupied the first three places, with the Martini-sponsored entry of Elford/Larrousse second and the Gulf-Wyer car of Siffert/Bell 3rd. The first Ferrari was the Sunoco 512M of Donohue/Hobbs in fourth slot, some five seconds in arrears of the pole sitter.^[4]

Pedro Rodríguez and Jackie Oliver's 917 lead the first hours. At 7:00 p.m. the Sunoco was third. At 8:16 p.m., Donohue pitted the Sunoco Ferrari early. The Traco-tuned engine died. At dawn the Matra was in an amazing second position. But at 9:40 a.m., Amon stopped in the long straight and stepped out of the Matra roadster. He had run out of fuel due to a faulty fuel-metering, and the pits were too far away to push the car.

Despite the extremely high speeds of the long tail versions, the 1971 Le Mans race was again won by a short tail car but with a magnesium chassis. The white No. 22 Martini Porsche of Helmut Marko and Gijs van Lennep completed 397 laps, which set a new distance record of 5,335.313 km (3,315.210 mi). That record, which many believed it would be unbreakable because of the lack of chicanes, would however be broken in 2010 when three Audi R15 TDI plus cars ran by Joest Racing ran in excess of that distance, despite the chicanes put since 1990 and other changes to the Circuit de la Sarthe course throughout the years (392 laps would be the amount of laps that would exceed the distance record in the 13.629 km (8.469 mi) configuration that was in use in 2010); all three ran at least 394 laps, with the winning car, the #9 of Timo Bernhard, Romain Dumas and Mike Rockenfeller, also ran 397 laps but ran a distance of 5,410.7 km (3,362.1 mi); the 1971 race was run in a 13.469 km (8.369 mi) configuration, which was the last race under that configuration; the 1972 race (up until 1978) ran in a modified 13.64 km (8.48 mi) configuration; since then, eight more modifications were made up to today's Circuit de la Sarthe, which stands at 13.629 km (8.469 mi) as of 2010 (the configuration was first run in 2007).

Official results

Le Mans in 1971

The race winning Porsche 917K of Helmut Marko and Gijs van Lennep

1971 Le Mans Porsche 917LH driven by Derek Bell & Jo Siffert parked outside the Hotel de France

Pos	Class	No	Team	Drivers	Chassis	Engine	Laps
1	S 5.0	22	Martini Racing Team	Dr. Helmut Marko Gijs van Lennep	Porsche 917K	Porsche 4.9L Flat-12	397
2	S 5.0	19	John Wyer Automotive Engineering Ltd.	Richard Attwood Herbert Müller	Porsche 917K	Porsche 4.9L Flat-12	395
3	S 5.0	12	North American Racing Team (NART)	Sam Posey Tony Adamowicz	Ferrari 512M	Ferrari 5.0L V12	366
4	S 5.0	16	David Piper Autorace	Chris Craft David Weir	Ferrari 512M	Ferrari 5.0L V12	355
5	S 5.0	58	North American Racing Team (NART)	Bob Grossman Luigi Chinetti Jr.	Ferrari 365 GTB/4	Ferrari 4.4L V12	314
6	GT +2.0	63	ASA Cachia Bundi	Raymond Touroul André Anselme	Porsche 911S	Porsche 2.4L Flat-6	306
7	P 2.0	49	Wicky Racing Team	Walter Brun Peter Mattli	Porsche 907	Porsche 2.0L Flat-6	306
8	GT +2.0	38	René Mazzia	René Mazzia Jürgen Barth	Porsche 911EC	Porsche 2.4L Flat-6	303
9	GT +2.0	42	Jean Mésange	Jean Mésange "Gédéhem"	Porsche 911S	Porsche 2.2L Flat-6	298
10	GT +2.0	26	Nicolas Koob	Erwin Kremer Nicolas Koob Günther Huber	Porsche 911S	Porsche 2.4L Flat-6	292
11	GT +2.0	39	A.G.A.C.I.	Guy Verrier Gérard Foucault	Porsche 911S	Porsche 2.2L Flat-6	290
12	GT +2.0	44	The Paul Watson Race Organisation	Paul Vestey Richard Bond	Porsche 911S	Porsche 2.2L Flat-6	286
13	GT +2.0	36	Écurie Jean Sage	Björn Waldegård Bernard Chenevière	Porsche 911S	Porsche 2.4L Flat-6	263

Not Classified

Pos	Class	No	Team	Drivers	Chassis	Engine	Laps
14	P 3.0	24	Automobiles Ligier	Guy Ligier Patrick Depailler	Ligier JS3	Ford Cosworth DFV 3.0L V8	270

Did Not Finish

Pos	Class	No	Team	Drivers	Chassis	Engine	Laps
15	GT +2.0	35	Pierre Greub	Sylvain Garant Pierre Greub	Porsche 911S	Porsche 2.4L Flat-6
16	S 5.0	57	Zitro Racing Team / Dominique Martin	Dominique Martin Gérard Pillon	Porsche 917K	Porsche 4.5L Flat-12
17	P 3.0	29	Wicky Racing Team	André Wicky Max Cohen-Olivar	Porsche 908/2	Porsche 3.0L Flat-8
18	S 5.0	17	John Wyer Automotive Engineering Ltd.	Jo Siffert Derek Bell	Porsche 917LH	Porsche 4.9L Flat-12
19	P 3.0	32	Equipe Matra-Simca	Chris Amon Jean-Pierre Beltoise	Matra-Simca MS660	Matra 3.0L V12
20	S 5.0	9	Ecurie Francorchamps	Hughes de Fierlandt Alain de Cadenet	Ferrari 512M	Ferrari 5.0L V12
21	S 5.0	6	Scuderia Filipinetti Scuderia Picchio Rosso	Corrado Manfredini Giancarlo Gagliardi	Ferrari 512M	Ferrari 5.0L V12
22	GT 2.0	47	André Wicky Racing Team	Jean-Jacques Cochet Jean Selz	Porsche 911S	Porsche 2.0L Flat-6
23	GT +2.0	1	Écurie Léopard	Jean-Claude Aubriet Jean-Pierre Rouget	Chevrolet Corvette Stingray	Chevrolet 7.0L V8
24	P 3.0	30	Louis Cosson	Louis Cosson Helmut Leuze	Porsche 908/2	Porsche 3.0L Flat-8
25	GT 2.0	69	Autohaus Max Moritz GmbH	Gerd F. Quist Dietrich Krumm	Porsche 914/6 GT	Porsche 2.0L Flat-6
26	GT +2.0	2	Greder Racing	Marie-Claude Charmasson Henri Greder	Chevrolet Corvette Stingray	Chevrolet 7.0L V8
27	S 5.0	18	John Wyer Automotive Engineering Ltd.	Pedro Rodriguez Jackie Oliver	Porsche 917LH	Porsche 4.9L Flat-12
28	S 5.0	15	Escuderia Montjuich	José Juncadella Nino Vaccarella	Ferrari 512M	Ferrari 5.0L V12
29	P 3.0	28	Auguste Veuillet / Établissement Sonauto	Claude Ballot-Léna Guy Chasseuil	Porsche 908/2	Porsche 3.0L Flat-8
30	S 5.0	7	Scuderia Filipinetti	Mike Parkes Henri Pescarolo	Ferrari 512F	Ferrari 5.0L V12
31	GT +2.0	65	Jacques Dechaumel	Jacques Dechaumel Jean-Claude Parot	Porsche 911S	Porsche 2.2L Flat-6
32	S 5.0	23	Martini Racing Team	Reinhold Jöst Willi Kauhsen	Porsche 917/20 "Pink Pig"	Porsche 4.9L Flat-12
33	S 5.0	21	Martini Racing Team	Vic Elford Gérard Larrousse	Porsche 917LH	Porsche 4.9L Flat-12
34	GT +2.0	33	Rey Racing	Jean-Pierre Cassegrain Jacques Rey	Porsche 911S	Porsche 2.4L Flat-6
35	GT 2.0	46	Ecurie Porsche Club Romand	Paul Keller Jean Sage	Porsche 914/6 GT	Porsche 2.0L Flat-6
36	GT +2.0	34	Richie Ginther Racing Inc.	Alain Johnson Elliot Forbes-Robinson	Porsche 911S	Porsche 2.4L Flat-6
37	GT +2.0	37	Pierre Mauroy	Pierre Mauroy Jean-Claude Lagniez	Porsche 911S	Porsche 2.4L Flat-6
38	GT +2.0	40	Jean Egreteaud	Jean Egreteaud Jean-Marie Jacquemin	Porsche 911S	Porsche 2.2L Flat-6
39	GT +2.0	41	Jean-Pierre Gaban	Jean-Pierre Gaban Willy Braillard	Porsche 911S	Porsche 2.2L Flat-6
40	P 2.0	50	Camel Filters Team Huron	Guy Edwards Roger Enever	Lola T212	Ford Cosworth FVC 1.8L I4
41	S 5.0	11	Roger Penske / Kirk F. White	Mark Donohue David Hobbs	Ferrari 512M/P	Ferrari 5.0L V12
42	S 5.0	10	Gelo Racing Team	Georg Loos Franz Pesch	Ferrari 512M	Ferrari 5.0L V12
43	P 3.0	60	Claude Haldi	Claude Haldi Hans-Dieter Weigel	Porsche 908/2	Porsche 3.0L Flat-8
44	S 5.0	14	North American Racing Team (NART)	Masten Gregory George Eaton	Ferrari 512S Spyder	Ferrari 5.0L V12
45	GT +2.0	66	Rey Racing	Jean-Claude Geurie Claude Mathurin	Porsche 911S	Porsche 2.2L Flat-6
46	GT +2.0	48	Jean-Pierre Hanrioud	Jean-Pierre Hanrioud Mario Ilotte	Porsche 911S	Porsche 2.2L Flat-6
47	GT +2.0	43	François Migault	Jean-Pierre Bodin Gilbert Courthiade	Porsche 911S	Porsche 2.2L Flat-6
48	P 3.0	27	Christian Poirot	Christian Poirot Jean-Claude Andruet	Porsche 910	Porsche 3.0L Flat-8
49	S 5.0	5	Racing Team VDS	Teddy Pilette Gustave Gosselin	Lola T70 Mk.IIIB	Chevrolet 5.0L V8

Statistics

• Pole Position - #18 John Wyer Automotive Engineering Ltd. (Pedro Rodríguez) - 3:13.9 (155.386 mph/250.069 km/h)
• Fastest Lap - #18 John Wyer Automotive Engineering Ltd. (Jackie Oliver) - 3:18.4 (151.862 mph/244.397 km/h)
• Distance - 5335.313 km
• Average Speed - 222.304 km/h

Trophy Winners

• Index of Performance - #22 Martini International Racing Team
• Index of Thermal Efficiency - #58 North American Racing Team (NART)

References

1. http://www.motorsportmagazine.com/archive/article/december-1998/72/david-piper
2. http://www.motorsportmagazine.com/archive/article/july-1971/26/le-mans-24-hours
3. http://www.mulsannescorner.com/maxspeed.html
4. http://www.racingsportscars.com/photo/Le_Mans-1971-06-13.html