26-02-2018, 09:37 AM
(26-02-2018, 01:00 AM)Bob Culver Wrote: the virtues of the equal length 4 into one pipework, much favoured for drag cars, and common generally from the 1960s, were not widely realised in the 1930s. Does anyone know any period car which used?
I have yet to find an explanation of exactly why superior to separate pipes.
I don't believe any pre-war car used such a system. Even well in to the 1950s Grand Prix cars did not have such a sophisticated exhaust, either relying on stub exhausts or unequal length primaries.