Whilst the original
concept may have perhaps gone back to Columbo it was Tadaeucci who
supervised the engine development. Utilising the experience with the
4 cylinder 150S and 200S similar relative dimensions to the 150S were
used. Colotti had the task of ensuring the 400 bhp could get to the ground
and this was achieved by the transmission, with the 5-speed gearbox in
unit with the ZF self-blocking differential being carried within the
wheelbase in a longitudinal position so as to not overload the rear axle -
a problem encountered on the 350S. The frame was a relative of the
300S and was influenced by the 350S. The first engine was mounted on
the original 350S frame in 1956, but the car did not compete until 1957 in
Buenos Aires with a new body and frame, and following a change in the
engine firing order which eliminated major vibrations. It was competitive
throughout the 1957 year. At Le Mans in that year it appeared in a
special body designed by Frank Costin and built hurriedly by Zagato.
For that event and the Mille Miglia a two speed supplementary transmission
was used with an overdrive function. Outlawed by the 3.0 litre rule
in 1958 the car went on to great success in the US and in the marine use
of the engine.
Tipo 450S - (#4501
then #4512) designed
by Frank Costin for Stirling Moss and built (hurriedly) by Zagato for the
1957 Le Mans. Photographs on rest of page are courtesy of Barchetta
Tipo
450S (#4510) Owned by Frank Harrison who acquired it through Carrol Shelby
in 1958. Car was extensively campaigned in the US by Walt Cline and
Jim Hall
Tipo
450S (#4510) Now owned by Tom Hollfelder (USA)
Tipo
450S (#4510) All photographs of #4510 are courtesy of Barchetta
Tipo
450S (#4510)
Tipo
450S (#4510)
Tipo
450S (#4510)
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