This is the competition preparation manual issued by the
factory. It containes 3 different stages of tuning available by the factory. The ‘hottest’ option was Stage II which containes a Weber carburettored cast iron 8 port head. You may be interested in the
instructions for the works style wing ventilation opening in the front wings.
Spitfire racing in the USA
Triumph made a big effort in their most important export market. Check out the history here.
