Microchip Middleweight

by Steve Sturgess • Cummins' latest US engine launch is the ISC, an electronically controlled, 24-valve derivative of its 8.3-litre, six-cylinder C-Series. Changes to the engine......

Fuel System

• A four-valve head was essential, but in the smaller engines with reduced bore dimensions, finding space for the valves and the central injector was a real challenge. On the......

Mechanical Changes

• The 24-valve head is new; an important feature is the noadjust overhead cam, significantly reducing running costs. Other design improvements include a more rigid block and......