Model: Compressor 600cc
Year: c 1947
Displacement: 600 cc
Cylinder: 2 - transverse
Engine type: 4-stroke / ohv
Top Speed: 165 km/h
Frame number: 0A3
Engine number: 0A3
Oskar Pillenstein is the name that has had the greatest impact on Zündapp in the history of compressors. In the first post-war years, supercharged machines were still allowed in races. The Fürther racing team decided to build up a very fast Zündapp bike. The works driver Oskar Pillenstein built this machine based on the KS 600 with Richard Küchen and the Zündapp works. The story mentions that a friend and motorsport enthusiast Werner Seemann from Nürnberg was also involved in this project. "The conversion turns out to be difficult and expensive" -> this is how Oskar Pillenstein described it. Werner Seemann was an employee of the Zündapp works in development department. In the beginning, a Zoller compressor was used, but unfortunately this was unsuccessful. Instead of the Zoller, a Roots compressor was used, which achieved 50hp with numerous other changes. With performances above 50ps, many weak points emerge. Transmission, frame, cardan, ... were the biggest weak points. Many parts have been specially designed and tested until they work. The camshaft, for example, was specially made for this motorcycle and is unique masterpiece. In months of work, the weak points were eliminated piece by piece. The performance measurements were carried out at the Zündapp factory. The machine was now so powerful that the test bench was overwhelmed. The performance measurement was repeated and an impressive 60ps could be measured. The maximum speed was 165 km/h with a sidecar. The Fürther racing team was very successful with the combination. The Zündapp started on May 16, 1948 at the Noris Ring in Nürnberg. The driver was Oskar Pillenstein with co-driver Karl Rührschneck. The rivals were lucky because the poorly repaired cardan of the Zündapp broke on the starting lap. Karl Rührschneck is known for other numerous victories: He won the race in the Noris Ring in 1947 on an NSU in the 500c class, second place in the Feldberg race in 1950, first place at the Sachsen Ring race in 1952 and first place at the Schleizer Dreieck race. On September 12, 1948, the Pillenstein machine won the German motorcycle championship at the Noris Ring, Nürnberg, in the sidecar class. The team set a new class record at 103 km/h. It was driven 10 laps with a total of 37km. The overall best lap time was 22min 8sec. The driver was Oskar Pillenstein and co-driver was Adolf Krug.
The racing driver Loni Neussner, Röthenbacher, Germany bought the machine in 1948/49 for DM 10,000, which was a utopian sum at the time, and he became the best private German driver in the 600ccm class in 1949. Loni Neussner was a licensed NSU driver and in 1947 won the 600cc sidecar class on an NSU. He later achieved 7th place in the world champion class in the sidecar class and in 1959 7th place in the TT.
Another victory was achieved by Willi Hofmann with the compressor Zündapp at the racetrack in Würzburg with 15,000 spectators. Co-driver was Elmar Neuberger. The lap time was 2min 16sec with an average speed of 55.3km/h. On July 30, 1950, the Zündapp took part in the Donauring race. The average speed was 84.4 km/h. The licensed driver Willi Hofmann and co-driver Baierlein-Giggenbach only managed third place after a crash. The big competitors were the compressor machines from BMW with Klankermeier and NSU with Böhm. The machine achieved some racing successes and was always at the forefront. The machine fell into oblivion many years later. The former co-driver Elmar Neuberger went looking for it and was able to find the dusty machine in a corner in the motorcycle workshop “Gebrüder Reinfurt” Würzburg, Germany again. The “Gebrüder Reinfurt” had a racing team as well. He restored the Zündapp in 1987 and took part in a few races. In 1995 the machine was handed over to the Nürenberg museum for 27 years. Elmar Neuberger built a small combination for tributes to the large one. The large and small combination has been inseparable ever since.
The Pillstein Zündapp has an extensive folder of documents, information of the buildup and development of the Zündapp, pictures and information on the drivers and racing history, pictures and information on the restoration and a veteran certificate.
Günter Sengfelder confirmed and authenticity and originality of this machine. This certificate is included with the machine.
History of Günter Sengfelder:
Günter Sengfelder was an employee at the Zündapp plant and knew the people in the developing department; Hans Hofmann (test master), Hofmann and Werner Seemann who played a key role in the creation of the Pillenstein machine. He was a founding member of the technology museum in Nürnberg, Germany. He supports the museum in particular with his historical and technical knowledge of the Zündapp brand. Due to his in-depth knowledge, he was also the author of several books about the Zündapp brand-> "Zündapp im Bild Die Münchenner Jahre 1958-1984" (ISBN 3613020343), "Zündapp KS750" (ISBN 387943591X) and the book meant "Zündapp 60 Jahre" (ISBN 9783980498715). He is one of the last Zündapp contemporary witnesses who knows the story and is still alive.
The motorcycle is ready for race.
The sound of this machine can hardly be described in words.