It no longer had three interchangeable heads and also featured early electronic injection control of the PT fuel system. The 86NT was released in early 1986 and featured the greatest changes to the 14-litre engine since its inception. In the USA there was also a Big Cam 4 engine, but the local Cummins marketing people thought the ‘Big Cam’ nomenclature had gone far enough! Through the 1970s and 80s, the 855 cubic inch engine went through various development phases, characterised by being called ‘Big Cam 1, 2 and 3’ engines. This period also marked the introduction of Clessie Cummins’ invention, the Jake Brake, although it was manufactured by Jacobs. As improvements were made to Australia’s highway network and the loads got heavier, the turbocharged Cummins N-series came into its own as a true ‘big banger’.īy the mid-60s, it was available with peak outputs of 335hp and 900lb ft.
