Yes I have, I don't care for their 7.3 tuning.
The reason smoke and heat are low is they also cut power pretty low. This is what I have seen on the dyno and my personal experience, and why I won't run their tunes in my 7.3.
Every tuner does tuning differently, nothing to knock Gearhead, their tunes just aren't for me.

 

I know what you mean Jim, my heavy tow tune from them is STOCK! I didn't put 10K under my hood to pull in stock form.

 

I did take some measurements and I could fit another six gallon tank in on the other side of my aux fuel tank. I'm just not sure what all that water is doing to my engine?


The camper holds 80 gallons but after a windy mountain pulling day I will not have enough water to take a shower! LOL

 

As long as its only injecting water when its hot, then it shouldn't be doing anything. Water is a product of fuel combustion too, so there is always a little water vapor in your cylinders.