To enhance torque at engine speeds below 1800 rpm, the nozzle vanes would close to narrow the air path and increase the speed of the air flow.
Initially, the turbocharger was positioned under the engine.
The forged connecting rods had fracture split bearings for the crank end and an asymmetrical profile which increased precision during assembly..
The four valves per cylinder two intake and two exhaust were actuated by pivot-type roller rocker arms.
At higher engine speeds, however, the vanes would open to reduce airflow resistance and improve fuel consumption.
The pistons had internal cooling channels, while oil jets in the crankcase sprayed the underside of the pistons.
Description: Furthermore, the intake ports and the diameter of the intake valves were designed to create a swirling effect for the air as it entered the combustion chamber.