Well I just got it last week and installed it over the weekend. Downloaded the tow tune first and adjusted my tire size and enabled high idle. (SWEET!) Turned Juice down to 0 and went for a quick test drive. Nice power and surprising amount of smoke for a mild tune. Sunday before heading out decided to play a lil and downloaded performance tune. Very impressive. Now don't get me wrong i love my Edge but the Predator is a whole different kind of power. Very smooth throughout the rpms and a lot more down low. Pulls harder on the top too. The Edge has always seemed doggish at the bottom, pulls like a freight train in the middle and then when you get to the top end it falls on its face. Anyway overall I like it so far - idles a little rougher but not bad. I'll report back once i get some more miles behind me with it. I understand the Edge is timing/duration only but was wondering exactly what the Predator does. I noticed the rail pressure at idle seemed to go from around 6-700 without it to 8-900 after installing tune. So I assume it adds pressure? And what is different about the Stacker tunes? No timing? wondering how to run both together without too much timing. Would like to run the Juice on lower levels and test combos to get most mileage/power.

 

My truck seemed to like the standard (non-stack) performance tune and the Hot Juice set on 4 - which would be 5 on your '06. That is the combo that gave me the most power.

 

I assume on your 04.5 would be the same on my 06. I've heard good results from the stack but mostly seems to be from people with 03-04 trucks.