4x4ord wrote:
I'm surprised they're pushing that much more boost just to gain a few more ponies.
The added boost and air flow is likely not just for the extra ponies, but rather keeping temps in check with the extra ponies in all situations even sustained loads. Cummins tunes their engines for sustained loads, not just short burst power. If that means they are not the horsepower king then so be it. At least that was the mindset when I was there, but I doubt much has changed in that department since then. This is why all the review sites always state that the Cummins seems to be less effected by loads than the other two. Because the engine is set up and tuned for sustained power under load, not stop light pulls.
This can be tuned out with an aftermarket tuner though and ironically the max tuned power output of all three on stock parts are roughly the same at around 525 rwhp.