eHoefler wrote:
Compression is only one part of the puzzle. The lower compression motor has a higher output turbo, which translate to higher compression when running hard. More air + more fuel = more power. As far as fuel economy, I am with in 1/2 mile per gallon of my old truck, pulling the same trailer and the same roads. With just over 2,000 miles on this beast. As miles get put on, I suspect the milage will only get better, like my 4 previous Rams.
The lower compression allows for more power while staying within NOx emissions. You could not have that same power output with the 19.0:1 compression ratio engine and still remain NOx legal. I have to check the specs on Cummins Quickserve when I get back to work, but I don't believe the turbos are different just the engine tuning. Both engines can easily and reliably make well over factory power levels, but they cannot do it and stay emissions legal.
