Just thinking out loud. Have you tried opening the gate sooner? WOT 27-30 psi out of the 62 seems like it’s doing most of the work. If you could get 20 total and 8 out of the atmosphere turbo cruising I would think you’d gain some midrange 🤷🏻♂️
Factory pads seem to give the longest life. At least from what I’ve ran. He’s probably just that aggressive on the brakes. He could add cooling to the brakes and that’ll make them last longer. Or getting larger rotors.
Also if you’re unsure about a change you made in the tune post it up and we can take a look.
Edit I think there’s still a timing calculator floating around somewhere that’s very helpful.
It was possible 09 if not 10 when they added stabilitrac. My 08 doesn’t have it. But I believe dually didn’t get stabilitrac until 11 if I remember correctly