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In 1977 Kremer sufficiently improved the 935 to begin series production of their own version. It was the third Kremer built on Porsche's successful platform and many 935/934s were updated to reflect ideas from the brothers in Cologne. The K3 version of their 935 was a great success and won the 1979 24 Hours of Le Mans, 1980 Sebring 12 Hours outright.
Porsche 2708 Indy
Porsche again attempted to enter CART in 1987. This time it would be a full factory effort, chassis and all. The car had an aluminum-plastic monocoque chassis attached to a 2.6 Liter, 800hp V8. Information gained from their 1980 bid would be used to build the car. This was their first mistake. Indy had stepped up their game over that seven year span. The pole speed at Indy had advanced from 192 mph in 1980 to 215 mph in 1987. It was a different world.
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.
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.
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.
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 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.
On 3 January 2019 the 718 Cayman GT4 Clubsport was unveiled in two variants, Competition and Trackday, with first customer cars delivered to customer teams ahead of the 2019 Roar Before the Rolex 24 Hours at Daytona International Speedway. The race car is powered by a 3.8-litre naturally-aspirated flat-six engine producing 425 PS (419 bhp; 313 kW) at 7,500 rpm and 425 N⋅m (313 lb⋅ft) at 6,600 rpm connected to a 6-speed PDK gearbox. The kerb weight is 1,320 kg (2,910 lb). Both variants feature a welded-in roll cage, a six-point harness and race bucket seat, a selection of body parts made of natural-fibre composite materials and race suspension from the 911 GT3 Cup.
The chassis number 718-046 of a 1961 718 RS 61 Coupé was used for a new car called 718 GTR in 1962.. The Coupé version was developed from this RS 61 donor and was initially fitted with a 4-cylinder engine. This car was also upgraded to an 8-cylinder F1 derived engine which produced 210 horsepower (160 kW). The car was also fitted with disc brakes. A GTR Coupé driven Jo Bonnier and Carlo Maria Abate won the 1963 Targa Florio making it three wins at the event for a 718 car.
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
The story of the 718 coupé began in 1960 when a customer ordered a one-off design from Karosserie Wendler. The car was built on the Porsche 550 chassis. Front-end design came from the 718 Spyder. The roof and the rear end were unique creations by Wendler. For the Le Mans 24h race in June 1961, Porsche created two 718 RS 61 Coupés. They shared the side view silhouette of the Wendler coupé and the rear end of the 718 Spyder, but the front design was original to the car.
The 1961 Porsche RS was one of the last Spyders made by Porsche that used the potent 4-cam engine. It was a successor to the 1960 RS60 which was a highly developed version of the original 550 RS Spyder. These diminutive racecars excelled on the tighter courses like the Targa Florio which was first won by Porsche in 1956. That victory marked the first time a sports car with a midship engine had won a major motor sports event.
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.
The 1961 4-cylinder special Spyder is the car that became the 1962 8-cylinder W-RS Spyder. It started during the 1961 racing season, when three special 718 racing cars were created for the factory team. Two of those special cars were built as coupés and one as a Spyder - with chassis number 718-047. For the 1962 season, the car got some changes and became known as the Porsche 718/8 W-RS Spyder. Out went the four cylinder and in came an eight-cylinder engine from the Porsche F1 race car (enlarged to 2 liters).
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.
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 787
The Porsche 787 is a Formula One (F1) racing car built and raced by Porsche for one year in 1961. The first car (a prototype) was created from the experimental Porsche F2 car with chassis number 718/2-05. The 1961 Porsche 787 was the first Porsche with fuel injection, 6-speed transmission and coil springs in all corners. Only two 787s, serial numbers 78701 and 78702, were ever built. Due to their lack of power and poor handling it was retired.
The Porsche 804 was produced by Porsche to compete in Formula One (F1). It raced for a single season in 1962 in the 1½ litre formula. For 1962 Porsche developed an 8-cylinder engine for F1. It was air-cooled and had twin overhead camshafts, four Webber carburetors, and two valves per cylinder. Porsche stayed with carburetors and steel rims while other manufacturers had moved to lightweight wheels and fuel-injection.
The Porsche 904 Story & History
Porsche’s Type 904, officially called the Carrera GTS because Porsche and Peugeot were in dispute over numeric designations with “0” in them, succeeded the RSK Type 718 as the last sports-racing iteration of the 356 series. Developed after Porsche left Formula One in 1962, the 904 (as it soon became popularly known) was also the last full-competition Porsche that could be readily driven on the street. This is the full story.
Porsche 904 Bergspyder
For the underpinnings of the new 904 Bergspyder, the Porsche engineers recycled five chassis originally laid down for a production version of the six-cylinder 904/6 Coupes. The steel platform chassis of the 904 was reinforced with cross-braces to compensate for the rigidity that had originally been provided by the coupe body. The Bergspyders were tried with both the exotic twin-cam eight-cylinder engine and a highly tuned flat six.
PORSCHE 904 CARRERA GTS
The Porsche 904 debuted late in 1963, for the 1964 racing season. Porsche designed the 1965 Porsche 904 Carrera GTS variant to compete in the FIA-GT class at various international racing events and a street-legal version debuted in 1964 in order to comply with FIA’s Group 3 homologation regulations. When the 904 Carrera GTS debuted, it represented Porsche’s first foray into fiberglass bodywork and the last hurrah for its four-cam, four-cylinder engine. 
In 1965, the 904’s second and final production year, some examples received a version of the 911’s 2.0-liter flat-six. This version was dubbed the 904/6 and was focused on the factory works effort by Porsche. Six of these cars were so equipped and used a chassis number of 906-0xx. Porsche built a total of six similar 904/6 Works team cars with the following chassis number assignments: 906-001, 002, 005, 006, 011, and 012.
Three factory race cars were fitted with a flat eight-cylinder power plant derived from the 1962 804 F1 car, the 225 hp (168 kW) 1,962 cc (119.7 cu in) Type 771, which used 42 mm (1.7 in)-throat downdraft Weber carburetors.  The Type 771s, however, suffered a "disturbing habit" of making their flywheels explode. The 904/8 cars had a short and relatively unlucky racing career.
Porsche 906
Developed for endurance sports car racing, the 906 was a street-legal racing car that raced in the FIA's Group 4 class against cars like the Ferrari Dino 206 P. They often won their class behind the much larger prototypes such as the Ford GT40 Mk II and Ferrari 330 P3/4. Based off the same principles as the 904, the 906 used a boxed steel chassis with a fiberglass body that added rigidity to the design. The greatest success of the Porsche Carrera 6 "Standard" was undoubtedly the victory at the Targa Florio 1966.
The technology in racing during the mid 60s was shifting from carburetors to fuel injection. Porsche began experimenting and the Bosch injection system proved to be the most reliable. Though the performance did not increase, it did provide superior throttle response over the Weber carburetors, and it was easier to tune. To compliment the new engine, a new body was created which reduced drag levels. Porsche dubbed the resulting car, with its new engine and body work, the 906E, with the 'E' representing 'Einspritzung, or injection.
The 906 LH was capable of achieving 174 mph/280 km/h with its 2-litre engine (906 K: 165 mph/265 km/h). At high speed the long tail started to create lift (opposite to downforce), which made the car go fast on the straight, but was dangerous to drive. At Le Mans, the 906 LHs with their experimental bodies competed in the 2-litre prototype class.
Porsche 906 Ollon-Villars (Spyder)
A spider body was fitted, and its inaugural appearance was at the Swiss Ollon-Villars hillclimb where it was met with disappointing results that were clearly to-do with poor testing and rushed development. The Ferrari's easily dominated the event and sent Porsche and their ''Ollon Villars Spyder' back to the drawing-board.
Four factory 906s received an air-cooled eight-cylinder boxer engine of the type 771, which was already used in the 904/8. The engine had a displacement of 2.2 liters with a compression of 10.2: 1 and vertical shafts that drove the two overhead camshafts per cylinder bank. The maximum output was 198 kW (270 hp) at 8600 rpm. All vehicles were equipped with a five-speed manual transmission of the type 906 and a ZF limited-slip differential . The gear ratios could be exchanged as required without removing the gear.
Porsche 907 K
The K in 907K stands for short-tail ("Kurz" in German). Porsche brought four new 907s with short-tail bodies to the rugged Sebring circuit in March 1968. Seven laps in, one 907 was out, and a second suffered engine troubles after 46 circuits. Not to worry, as the other two dominated the race. Porsche 907 024 with drivers Hans Herrmann (Germany) and Jo Siffert (Switzerland) went from the pole position to a dominating victory at an average speed of 102.512 mph, 10 laps ahead of its sister 907.
In 1967, Porsche brought a new kind of car to Le Mans. The 907 had a small flat-six and incredibly low bodywork, was aerodynamically optimized. Ford won Le Mans, but the 907 proved its worth. At the end of March, 1968, Porsche had four type 907 chassis ready, and brought them to the 24 Hours of Daytona. Fully developed, the 907 now used a 2195 cc aircooled, magnesium alloy flat-eight with Bosch fuel injection, good for 278 bhp at 8700 rpm. The 907LH (lang heck, or long tail) was slippery, stonking fast and wicked hard to drive. And it won.
Porsche 908/02 Flunder
The 908/02 K Spyder and 908 K Flunder Spyder were basically the same cars with slightly different bodyworks. If you look at the non-Flunder Spyder, you see that the body drops after the front wheel arch and rises again before the rear wheel arch. In the Flunder version, this concavity doesn't exist. The difference between the two versions was mainly visual, no difference in racing use. The first competition the Flunder was entered, was the Nürburgring 1000 km on June 1, 1969.
The longer tail 908 Spyders were created only with the Flunder body - the body that's upper surface is almost flat between the axles - and not with the "normal" curvy Spyder body. Very few LH Flunders were created, both with 908/02 and 908/01 chassis numbers. 908 LH Flunder Spyder was first used at the 1969 Le Mans 24h race by Jo Siffert and Brian Redman, but they had to retire because of the gearbox failure. The only excellent result was 3rda at the 1970 Le Mans.
Porsche 908K
The Porsche 908/01 K Coupé was basically a 907 K with the new 3-litre flat-8. “K” in the designation stands for Kurz which is “short” in German, meaning the car had short-tail body compared to the 908 LH (“langheck”, long-tail). Although 907 and 908 were similar, there was a visual difference - the 907 had symmetrical front openings and the 908/01 K had asymmetrical. The 908/01 K debuted on May 19 at the Nürburgring 1000 km race and won it outright.
Porsche 908/01 LH Coupé
The FIA’s new three-liter prototype (Group 6) and five-liter sports car (Group 4) regulations adopted for 1968 presented the opportunity for Porsche to update its 907, which had won races but lost the championship. In came a 2997 cc flat-eight engined 908. Despite its aero appearance, it was no easy car to drive fast, weaving as speeds approached 200 mph. Despite winning the 1000km Nürburgring, the 908 was anything but convincing in 1968.