I posted this on the 2kxx section but figured it may get more traction here. So my tuner is telling me that to full take advantage of the water/meth we need to "Breakout" the IAT(intake air temp) from the MAF(mass air flow) to get a real IAT reading since the water/meth is sprayed after the MAF!!! I just ordered a harness and a sensor from Dedicated Motor Sports that will accomplish this. Has any one done this?

He also said that he has a low side fuel solution for our trucks as well. I will let you all know more about that when I find out more.

 

 

To echo 03sierra,

Any possible gains are going to be negligible if tuned properly. You really shouldn't have to start pulling timing until around 130 degrees IAT.