Yesterday GMC teased the 2017 Sierra 2500 Denali HD, and promised that it’s new hood scoop was hiding a surprise for loyal buyers. Not wanting to be left out, Chevrolet has followed suit, with the unveiling of the 2017 Chevrolet Silverado 2500 HD. Unlike the Sierras apperance, this helps shed some light on what changes are in store for the new model year.
Unfortunately these revisions will not include a new engine, with the aging 6.6 liter Duramax diesel soldiering on for a few more years. But despite its age, the grizzled veteran gains some new moves thanks to a new hood scoop and air intake system that was designed to help
improve airflow to the engine. GM claims that unlike other scoops that dump air indiscriminately into the engine, this one was designed to achieve a ram-air “supercharging effect” which translates into more potent performance benefits.
In addition to the improved air airflow, the system also incorporates an all new system that removes moisture from the charged air which helps maximize the combustion potential of the air fuel mixture.
GM engineers revealed the intricate science behind this simple solution explaining that after the air enters the engine bay, it enters an expansion chamber and then makes a full 180 degree turn before reaching the intake chamber. The high centrifugal forces involved in the turn pulls the water molecules out of the air with the resulting water being drained through a valve.
On an ideal day, GM estimates that the scoop will account for 60 percent of the air taken in with the remainder flowing in through an opening in the front fender. That opening can also serve as the sole source of air if the scoop is blocked by ice, mud, or other debris.
Chevrolet is not revealing whether the revised intake system boosts power or not, but it appears that it could help the Duramax unleash its full potential in a wider range of conditions. However, it will not shock us if the intake also allows a few extra ponies to break free from the stable.
It will be interesting to see what this minor revision does for both the Silverado and its GMC badged cousin, but look for more information to be released closer to their respective launches later this year.