The turbo-diesel V8 engine in the next generation Titan will have a new two-stage turbine unit developed jointly by Cummins and Nissan. The new design will help to reduce lag, generate more low end torque, and deliver smoother transitions between low and high rpm.The new turbine unit uses a Holcet turbo with new Rotary Turbine Control (RTC). This shunts the exhaust gases in various modes to optimize emissions or power depending on what you need.
The RTC system has 4 operating modes. First is High-Pressure mode. This mode uses both stages and minimizes lag for a better response when shifting gears. Low Pressure mode cuts out the first stage to provide greater power output. There is also a Wastegate mode which provides maximum power output, and a Regen mode that helps the engine comply with emissions standards.