LML Duramax Tuning
The LML engine was significantly updated for 2011 to provide improved exhaust emissions that comply with the new federal emission standards for diesel engines, provide better engine rigidity and further noise reduction. New 29,000 PSI piezo injectors, a complete fuel system-hardening to tolerate up to 20% biodiesel mixtures and urea injection (to reduce Nitrogen oxides) with a 5.8 gallon urea tank are updating the fuel and emissions systems. This engine also has now 9 fuel injectors, one directly injecting in the exhaust tract, to allow raw fuel injection during the particulate filter recycling routine. This was previously accomplished by running raw fuel through the engine via the engine fuel injectors without igniting the fuel (valves were kept open), but risks of washing down cylinder walls and causing engine damage are increased with the use of Biodiesel. The RPO LML engine is rated at 397 horsepower at 3000 rpm and 765 lb.-ft. of torque at 1600 rpm.
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This page show the different power levels for the 2011 6.6L LML Duramax.
The graph below shows the difference between a BONE STOCK LML and one equipped with a downpipe-back exhaust system and Mini Maxx on the DPF Removed HOT setting:
-STOCK: 360 HP / 671 Ft-Lb Torque
-HOT: 497 HP / 994 Ft-Lb Torque!!!
The dyno graph below shows the DPF Removed NO POWER, DPF Removed MILD, and DPF Removed WILD Power Levels:
-NO POWER: 361 HP / 690 Ft-Lb Torque
-MILD: 406 HP / 803 Ft-Lb Torque
-WILD: 453 HP / 910 Ft-Lb Torque
-MILD: 406 HP / 803 Ft-Lb Torque
-WILD: 453 HP / 910 Ft-Lb Torque
(No HOT setting is currently available for DPF Present tuning)
-STOCK: 360 HP / 671 Ft-Lb Torque
-MILD: 388 HP / 738 Ft-Lb Torque
-WILD: 421 HP / 837 Ft-Lb Torque