1970 Porsche 917 Explained
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2020-03-07に共有
Powered by the Type 912 flat-12 engine of 4.5, 4.9, or 5 litres, the 917/30 Can-Am variant was capable of a 0-62 mph time of 2.3 seconds, 0–124 mph in 5.3 seconds, and a test track top speed of up to 240 mph.
The car was designed by chief engineer Hans Mezger and was built around a very light spaceframe chassis weighing only 93 lb which was permanently pressurized with gas to detect cracks in the welded structure.
Power came from a new 4.5-litre air-cooled engine designed by Mezger, which was a combination of 2 of Porsche's 2.25L flat-6 engines used in previous racing cars.
The original 4.5-litre engine, which had produced around 520 bhp in 1969, had been enlarged to 4.9-litres making 600 bhp to 5-litres and produced a maximum of 630 bhp. The 917K models were generally used for the shorter road courses such as Sebring, Brands Hatch, Monza and Spa-Francorchamps. The big prize for Porsche however, was Le Mans. For the French circuit's long, high speed straights, the factory developed special long tail bodywork that was designed for minimum drag and thus highest maximum speed. On the car's debut in 1969, the 917L proved to be nearly uncontrollable as there was so little down force. In fact, they generated aerodynamic lift at the highest speeds. For 1970, an improved version was raced by the factory and for 1971, after very significant development in the wind tunnel, the definitive 917L was raced by both factory and JW. These cars were so stable that the drivers could take their hands off the steering wheel at speeds which reached 246 mph.
In 1971 Jo Siffert raced an open-top 917PA Spyder which was naturaly aspirated in the 1971 CanAm series. There is also the "Pink Pig" aerodynamic research version (917/20), and the turbocharged 917/10 and 917/30 CanAm Spyders. Porsche 917s also raced in the European Interseries in various configurations. In the 1973 Can-Am series, the turbocharged version Porsche 917/30 developed 1,100 bhp.
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コメント (21)
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The car that really put Porsche on the map. There needs to be a movie about this car
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This has to be one of the best videos I've seen on the Porsche 917.
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My two absolute favorite cars - 917 and 918! :)
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It's too bad Porsche never produced a 2 seat, roadgoing version of this, like Ford did with the GT40. They would have destroyed any street Ferrari, Lamborghini, Maserati, Pantera, anything.
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I own 2 hot wheels of this car and always wondered what it sounded or really looked like and was shocked to see this
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Legendary Porsche ever
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I've raced a Porsche 911 at ears Point for 14 years. What I wouldn't give to pedal that beast around this track...
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I've liked the 917s since I saw the movie LeMans in 1971. I was 6. Forever since, I've considered that the perfect racecar shape. Though the Ferrari of the time was beautiful too.
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I've read the 917 was a "homologated production" sports car where only 25 needed to be produced (for homologation). For 69-71 "production" cars could have 5 litre engines whereas prototypes were limited to 3 litres. The FIA didn't think any manufacturer would build 25 cars to a new design. Porsche did. I recall Frrrari did with the 512.
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RIP HANS MEZGER
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Cars like guitars reached their maximum level in 1969
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I love the Gulf Oil livery of that era.
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Great car. Couple of stories I heard differently 1) Mark Donoghue 917/30 CanAm was 257mph 2) 917 Long Tail - on a hot day in testing they noticed the lack of splattered insects around the rear of the car, suggesting why the rear wing was so ineffectual! No air flowing over it!
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The greatest race car of all time!!!
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That car is insane!
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Love this car and have watched the build of one and hope to just sit in it one day
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A 93 pounds space Frame. Holy shit...
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Before the chicane on the Mulsanne straight the short tail 917K would regularly exceed 252 mph at 7900 8000 rpm
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Still so beautiful I saw one at Laguna seca couple years ago wow the best.
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King of the road. Period. Even the Porsche test drivers were scared of it. It is said that this model n/a engine pulled as hard in 4th as it did in 1st. Can you say serious foot pounds of torque?
