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1973 Porsche 917/30 Spyder

Rule changes for the World Championship of Makes eliminated the stunning Porsche 917 during the early 1970s allowing the factory to develop the car for the open-top Canadian-American (CanAm) Championship in North America. Teams from McLaren, Lola and Chaparral were attracted to the 200 mile Sprint races of the formula and the rule book permitted almost anything, including free engine displacement and the use of turbochargers. Porsche used its new-found skills with forced induction to attach two exhaust-driven turbochargers to the flat-twelve engine of the 917. The result had a displacement of 5.4 litres and produced at least 1,100 bhp, making it one of the most powerful racing cars ever built.

The 917/30 went on to dominate in the 1973 CanAm with the top four places in the final points being taken back to Stuttgart and Porsche factory driver, Mark Donohue, setting a closed circuit record of 222 mph (355.85km/h) around the Talladega Oval, Alabama. A time that still ranks as one of the fastest race laps ever.


In Detail

type Racing Car
built at Germany
production 6
engine Air Cooled, Magnesium/Aluminum Alloy Flat-12
position Mid Longitudinal
aspiration Twin Eberspacher Turbos
ignition Twin Spark, Dual 12V Distributors
block material RZ5 Magnesium Alloy w/Chromal Cylinders
valvetrain Gear Driven DOHC, 2 Valves per Cyl
fuel feed Indirect, Mechanical Bosch Fuel Injection
displacement 5374 cc / 327.9 in³
bore 90 mm / 3.54 in
stroke 70.4 mm / 2.77 in
compression 6.5:1
power 809.1 kw / 1085 bhp @ 7800 rpm
specific output 201.9 bhp per litre
bhp/weight 1356.25 bhp per tonne
torque 1098.2 nm / 810 ft lbs @ 6400 rpm
body / frame Body over Tubular Frame
driven wheels RWD w/LSD
front brakes Vented Discs
rear brakes Vented Discs
steering Rack & Pinion
f suspension Double Wishbones
r suspension Double Wishbones
curb weight 800 kg / 1764 lbs
wheelbase 2500 mm / 98.4 in
front track 1670 mm / 65.7 in
rear track 1654 mm / 65.1 in
length 4562 mm / 179.6 in
width 2085 mm / 82.1 in
height 1080 mm / 42.5 in
transmission Type 920 Four-Speed Manual
top speed ~386.2 kph / 240 mph
0 – 60 mph ~2.1 seconds
fuel capacity 400 litres or 105.60 gal.

Auction Sales History

1973 Porsche 917/30 Spyder

1973 Porsche 917/30 Can-Am Spyder 917/30-005 – did not sell for €2,000,000 One of the most dominant Porsche racing cars of all time. Outrageously powerful turbocharged flat-12 engine. The last of four 917/30 chassis completed by the factory. Built at Weissach; a genuine factory-built 917/30. Featured in Motor Trend magazine and Automobile Quarterly. Documented by Jürgen Barth. Auction Source: 2014 Paris by RM Auctions

1973 Porsche 917/30 Spyder

1973 Porsche 917/30 Can-Am Spyder 917/30-004. The Most Powerful Road-Racing Car Ever Built.A n Undisputed Masterpiece of Automotive Engineering. One of Only Six Examples Built. Sold New to Australian Porsche Importer Alan Hamilton. Meticulously Restored in Penske Racing’s 1973 Sunoco Livery. Rennsport Reunion, AvD Oldtimer Grand Prix and Monterey Historics Participant. Featured Prominently in Pete Lyons’ Can-Am Cars in Detail. Eligible for Leading Historic Races and Porsche Gatherings. The Ultimate Evolution of the Porsche 917. Auction Source: The Amelia Island Auction 2012 by Gooding & Company

1973 Porsche 917/30 Spyder Video