well... what kind of tuning you running from elite?
i would say it woudl be a tuning issue.. no way i would lose to a jeep in my truck... but im also running a TW chip... i have never tried any of Elite's tuning so i can say if their good or not... but i can tell you that the best tuners out their for the 7.3L is TW and DP
on a side note what PSI were you runing? could have a boost leak..