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| Artist; Vic Berris |
The Offy 4 cylinder racing engine was designed in the twenties by Fred Offenhauser and Harry Miller of Miller Racing as a marine racing engine. During the 1930s, when Indianapolis racers favored 1.5 straight eights, it was adapted for car racing and started winning due to the displacement allowance of 3 litres for fours. During the 1950s, rules changes and the need for more power prompted a 4.1 litre supercharged version. Starting in the late sixties, turbocharging was being developed, With displacement back down to about 2.6 litres, and 25- 40lbs of boost the engine was again competitive. In all, cars powered with various forms of the engine won Indianapolis 27 times between 1935 and 1976.
1 comment:
...and then along came Jimmy Clark...! Offy cars continued to do well on Pike's Peak for long after they became uncompetitive on ovals - and then along came Michelle Mouton and her Audi. D.
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