Just ordered an SCT from 5star last night ,might need your help soon here mike.
93 perf tune ,87 tow and 93 tow tunes were on the list.Great product ,proven performance.

Question...how would a water/meth injection system work along side the tuner? would I need a custom map? Am I at risk for detonation? Anybody with experience with either meth injection or the new 6.2L gasser please tune in.

the goal here is 400+ RWHP

 

You don't need water/meth injection unless you are supercharging/turbocharging. Your goal of 400 rwph would require a crank hp of approx 560 hp. Your going to need to go with forced induction to get there without a huge loss in bottom end torque. What is your intended use for the truck and why the desire to get 400 rwhp? I'd personally be looking to get 400 rear wheel torque at a useable rpm before I started trying to reach big hp goals.

 

No i dont need it, it helps though. Alot greater gsins with forced induction motors, but yea. The projects off anyway I bought a new bike yesterday lol. Superduty does its job just fine on its 245/65s all stock motor. Thanks for the reply though, obviously if i used the word supercharger mire people would show interest.