Pros/Cons for 6.7 vs 5.9
#21
My experience has been that a 12v will make roughly twice the torque as it does power, but it seems like the newer ones, common rails in particular, make a little less than 2:1. I'm going off of memory here on the dyno figures of other people's newer stuff, as I've never modified any of the newer ones I've owned. My '98 12v was almost exactly twice the torque as power. It did 450/920.
#22