![]() ![]() While the chosen turbine wheel and turbine housing allow for quick spool-up, exhaust back pressure can get much higher than Cummins intended once more fuel is added through performance ECM programming.Įxtreme drive pressures not only hurt overall performance, but can negatively affect exhaust gas temperatures, causing the engine to run much hotter than known safe limits, which forces owners to back out of throttle and stare at a pyrometer gauge over every mountain pass. While the HE351 turbocharger does work quite well in factory form, once free-flowing exhaust systems, cold air intakes and performance tuners are added to the mix, the factory HE351CW starts to show its shortcomings rather quickly. Dodge also made changes to the turbo system in 2003 by switching from the somewhat outdated Holset HX35 technology to the HE351 turbocharger family, which offered tighter turbine sections to help with emissions and low-end response. They sport improved interiors, full four-door cabs and of course the switch from the VP-44 injection pump to the more reliable CP3 common rail injection system. Third gen Dodges with the common rail 5.9L represent much improved and refined vehicles all the way around. In fact, the 2003-07 Cummins is still one of the most popular trucks out there when it comes time to tow that heavy equipment from one jobsite to another. While Dodge/Ram has moved on to the larger 6.7L powerplant, it doesn’t mean the common rail 5.9L 6BT can’t continue to get the job done dragging heavy loads. The 2003-2007 5.9L Cummins became known as a true workhorse in the light duty truck market. ![]()
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