I've enjoyed reading through your thread and kudo's on the many modifications. I can only add that you can gain significant gains with water depending on how it's introduced. The better the disassociation of the molecules the better. Also if you can do that you will see the larger benefits not to mention a very clean exhaust. I've done a bunch of research related and have it utilized in different system and device designs to some gasoline engine induction system changes I've made that you can read about
here. It relates to increasing adiabatic efficiency along with of course volumetric that you already achieve with turbos. Keep up the good work and look forward to more or your accomplishments on your truck!