It's not the tuner but it probably does need an upgrade for other reasons. Seems that turbos that claim to move more air also require more rpms...
2000 F250 XLT 4x4 SC 7.3 w/rebuilt 4R100, 3 autometer gages, Super Zoodad, PHP Hydra chip, 4" DP/Exhaust w/dual 3.5" outlets, 275/70/18 Kumho AT51s on 8.5" rims, 08 AlumDiffCvr, Bilsteins, 31 row trans cooler, WW, BPV delete, AIH delete, hutch, harpoon and billet FPR (70psi), rear air bags, Jimmijammers.
Jayco 26BHS elite, no RV parks...just the woods, lakes and streams if possible.
See my album for a recent pic.