i have also found that running straight water on the diesel works best.. The last setup with the " big turbos" we used 2 nozzles w/ just water
Meth is isnt a good idea on a diesel engine unless you like changing headgaskets
how much boost are you running.
Are you wanting to run meth to make horsepower? Or do you want to just increase the boost and use water in to lower your EGTS ?