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The fifth and the last of the 718/2 F2 cars, with chassis number 718/2-05 was an experimental formula racing car. It had the 718/2 chassis, but a different body. The car never got its own type number. It was a one-off car, continuous development project that later evolved into something that became the prototype for the 1961 Porsche 787 F1 car and then even for the 1962 Porsche 804 F1 car. 718/2-05, was first seen at the F2 race on Solitude race track near Stuttgart in July 1960.
Porsche 718 RS 60
For the 1960 season the FIA made changes to the regulation regarding the windscreen and cockpit size. These rules changes together with a larger (1.6-litre) Type 547/3 engine, developing 160 horsepower (120 kW) and a new double wishbone rear suspension brought about the RS 60 model. The RS 60 brought Porsche victory at the 1960 12 Hours of Sebring with a car driven by Hans Herrmann and Olivier Gendebien. 1960 also saw Porsche win the Targa Florio with Hans Herrmann being joined on the winner podium by Jo Bonnier and Graham Hill. z
Porsche 718/2 F2
In 1959 Porsche unveiled the prototype of a narrow, open-wheeled car called the Porsche 718/2 that married the 718's mechanicals with a more traditional single-seat Formula body. For 1960 the production 718/2, starting with chassis number 718201, received revised bodywork, a 6-speed transaxle, and a wheelbase extended by 100 mm. A total of five cars were built. Some of these four-cylinder cars were later raced in F1 under the 1962 1½ litre formula.
A handful of push-rod 356As were delivered from the factory with a lightweight package that was usually reserved for the Carrera race cars. Called GTs, these got the stripped out interior, aluminum doors, a large fuel tank and Porsche ATE disc brakes. As few as four Speedsters came equipped this way. Since the four-cam was only a marginal improvement in power, the regular 1600 Super was more than enough for the small car.
Following the Pre-A prototypes and a run of quad-cams with the 1500cc engine, the 1600 Carrera GT was a performance 356 that used a larger version of the Porsche 550 Spyder's potent engine. As early as 1958, some Carreras were fitted with a larger engine known as the Type 692. The new unit featured a larger displacement which was better suited for the 1600cc class. Furthermore, it was improved considerably adopting plain bearings and new ignition system.
Porsche 718 RSK Mittellenker
Porsche created the single-seat 718 RSK Mittellenker (center steering) to compete in Formula 2 racing. The body differed from the 718 2-seat sports racer only to accommodate the central driving position, with revised seat, steering, shifter and pedal placement, and the aerodynamic fairing behind the driver’s head moved from the left to the middle. Instead of having a full-width cockpit, the body sides were extended toward the center to create a space solely for the single driver, with a short, wrap-around windshield.
In May of 1957, Porsche offered two distinct versions of the Carrera, one called the de Luxe for the street and this model, the Gran Turismo, for the track. The main difference between the two models was weight. The Carrera GT was a purpose-built car with little on board amenities. For instance, no heater was fitted giving the car its 'icebox' nickname. Furthermore, the interior was stripped of sound deadening, side windows were replaced by pull-up Perspex units and only simple door panels were fitted.
The 718 was a development of the successful Porsche 550A with improvements made to the body work and suspension. The car's full name is 718 RSK, where "RS" stands for RennSport (sports-racing) and the "K" reflects the shape of the car's revised torsion-bar suspension. It had a mid-engined layout and used the 142 horsepower (106 kW) 1.5-litre Type 547/3 quad-cam engine introduced in the 550A. There were several variations, including the RSK Mittellenker.
The 550A was based on Porsche’s first purpose-built racing car, the mid-engined RS 550 Spyder. Appearing at the end of 1956, the 550A differed from its predecessor by use of a full tube spaceframe with several rear supportive cross-members, rather than the heavier welded-up sheet steel internal structure of the 550. The rear swing axles of the 550 were replaced by a new low-pivot arrangement that made handling much more predictable.
Porsche 550 RS Spyder
The Porsche 550 Spyder was introduced at the 1953 Paris Auto Show. It was simple, small and packed a real punch. It was Porsche's first production racing car. The car was completely street legal, so it could be driven to the races and back home. A really special engine was developed for it, engineered by Ernst Fuhrmann. It was a flat DOHC engine, meaning it had 4 overhead camshafts like the Porsche type 360 design for Formula 1.
Porsche 645 Spyder, Solitude 1956, Richard von Frankenburg
Planned as a successor to the Porsche 550. A one off prototype was the 1956 super-light design utilising one of the spare 550 frames – 550-098 called ‘Mickey Maus’ which, with Richard von Frankenberg at the wheel, was reduced to a melted wreck that same year in a spectacular crash at the Avus race track. Known as Type 645, it was the beginnings of the new Type 718 Porsche with a shorter wheel base and unique suspension.
In 1953 Porsche created a series of 550 prototypes and 550-03 became the most important car in Porsche history by winning the 1954 Carrera Panamerica with Hans Herrmann at the wheel. This singular victory lent the Carrera nameplate to future models and also marked the first international victory of a mid-engine car. Only 15 prototypes were made until regular production began in 1954 of the Porsche RS Spyder.
One year before Porsche started production of the legendary RS Spyder, they experimented several unique 550 Prototypes. Two of these were fitted with removable hardtops that transformed the diminutive roadster into a sleek coupe. These were quite successful on faster circuits, but the roadster was later preferred as a more saleable car. The Coupes were retained by the factory to contest the Carrera Panamericana race.
Successful VW Dealer and racer Walter Glöckler built several specials for the German Car Championship including this roadster. It was built with assistance from Porsche in Zuffenhausen and raced without its optional hardtop in the 1952 champion before being shipped overseas for SCCA racing. Weidenhausen created the body from aluminum with a nose that bore close resemblance to the 356 Porsche but had semi-skirted rear wheels and cutaway rear corners similar to Glockler-Porsche 1 and 2.
In 1950, eleven remaining Gmund chassis were assembled after the factory returned to Germany and converted to SL (Sport Leicht) racing specification. They received 1,086-cc engines, enlarged fuel tanks, louvered quarter-window covers, wheel spats, streamlined aluminum belly fairings, and a pedestal-mounted shifter. Three Type 356/2 cars raced at Le Mans in 1951; two crashed, but 356/2-063 performed flawlessly, winning the 1,100-cc class.
When Porsche went to Le Mans, they reverted to aluminum shells made at their first factory in Gmünd, Austria. Three of these coupes, called 356 SL, raced Le Mans. All three Le Mans cars were shipped to America by Max Hoffman and sold to Fritz Kosler, Ed Trego and John von Neumann for SCCA racing. Before the 1952 races at Torrey Pines, von Neumann had Emil Diedt remove the coupe's roof, creating in effect the first Carrera Speedster.
The Cisitalia Grand Prix is a single-seater car for the postwar 1.5-litre supercharged Grand Prix class, built by Italian sports car manufacturer Cisitalia and introduced in 1949. It was designed on behalf of Cisitalia by Porsche between 1946–47, and is therefore also known by its Porsche project number, Typ 360. An extremely advanced design, it proved too complex to build for the small Italian firm (and lead to the financial downfall of the company).