Are these Generic TS TUnes? If they are, i would send the chip off to Beans Diesel Performance so you can get more specific tunes towards your truck. And i agree with what everyone else said.
If you have Stock Injectors, i dont think Water/Meth is needed. But Intake and Exhaust should help some. Do you still have a stock turbo? Make sure you have no Exhaust leaks at the Uppipes and check your intercooler boots for leaks also.
If youa re cruising at speed limits and you are 1200-1400* egts, then yes u have aproblem. But if you romp on it at WOT and it gets up there, as long as you dont stay on it for a long period of time, it shouldnt be an issue
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