Does GM have it backwards?
2019 Silverado 1500 offers a 6.2 with 420 HP and 460 lbs-ft of torque and 10 spd trans. The 2020 Silverado 2500 rumored to offer a 6.6 with 400 HP and 450 lbs-ft of torque and 6 spd trans. Shouldn't ...
Forum Discussion
I believe there is a big misconception that if you tune the engine to higher than stock outputs that somehow you are shortening that engines longevity. This cannot be further from the truth in many cases today. Engines today are tuned to meet emissions and will even sacrifice the longevity of the engine to meet them.
Case in point are the diesels today. All of the emissions systems on these diesels actually decrease the longevity of the engine through fuel dilution and carbon buildup. Then there is the pilot injection which lowers NVH, but you are adding to amount of times that injector fires which increases wear over time.
Another example would be my old Ecoboost F150. The stock map knocked quit a bit and pulled timing to stay within emissions. The truck would also go into a limp mode if two misfires were detected in a single firing event. Why? Not to save the engine, but to save the catalytic converter from excess fuel. It would misfire because there was moisture buildup in early model intercoolers because the EPA no longer allowed manufacturers to add weep holes because it "could" leak contamination.
Altering the fuel maps and taking out these emissions perimeters in my Ecoboost decreased knock events allowing the engine to run more advance timing which increased power output. Now I will say that adding a lot of power to an engine will be hard on parts and decrease longevity. However, adding power by removing stock tuning that is designed to meet emissions will not necessarily equate to decreased engine life.
Case in point are the diesels today. All of the emissions systems on these diesels actually decrease the longevity of the engine through fuel dilution and carbon buildup. Then there is the pilot injection which lowers NVH, but you are adding to amount of times that injector fires which increases wear over time.
Another example would be my old Ecoboost F150. The stock map knocked quit a bit and pulled timing to stay within emissions. The truck would also go into a limp mode if two misfires were detected in a single firing event. Why? Not to save the engine, but to save the catalytic converter from excess fuel. It would misfire because there was moisture buildup in early model intercoolers because the EPA no longer allowed manufacturers to add weep holes because it "could" leak contamination.
Altering the fuel maps and taking out these emissions perimeters in my Ecoboost decreased knock events allowing the engine to run more advance timing which increased power output. Now I will say that adding a lot of power to an engine will be hard on parts and decrease longevity. However, adding power by removing stock tuning that is designed to meet emissions will not necessarily equate to decreased engine life.
