Jason, I realize that no two trucks are the same... but, I run Flux 1 nozzles... it's a 555 early HO truck. bone stock CP3, Fass 150, etc.
I run the Smarty TNT-R... SW#9, stock injector timing, moderate rail pressure, stock torque management. The truck obviously runs well on just the Smarty, but if I stand on it in 6th, when the truck is doing its thing at full boost, etc. As in crank up the TST, you can FEEL the truck pulling harder and harder.
The difference between the TST on power 0 and power 4 is pretty unreal. Every power level you can feel a push in the back. Until you get to 5. I can still hold rail pressure, but there's no extra push, so I run it on 4.
I have tried different Smarty numbers and running higher TST levels, but it didn't feel any better (granted, this is all SOP/butt dyno), and I can't say that the dyno would show a huge difference, but even a non-calibrated butt dyno would feel the power jump from 0-4 on the TST!
and the craziest thing I found recently was turning up the torque!!!! I was ready to sacrifice some top end for some better spooling driving around town, so I turned the power down and cranked the torque up. I got to torque level 5 and still had very decent smoke control. So then I start putting power on top of it. I'm actually making and holding MORE rail pressure now that the torque is turned up than I was with it on zero!
power level 4 or 5 on top of SW#9 gives me 22.5k psi at full boogie...
before if I just hammered down below 2000 or so, the rail gauge would dip, come up, dip down to 15k or so and then come up to 20k. now all of that dipping is pretty much gone. It seriously feels like a whole new truck.
I've got a Floor It stage 2 that's going on if I end up keeping the truck (if it's not gone by Nov 1, I'm probably just going to keep it) I'm excited to see how that pans out.
I think my injectors are my limiting factor right now. I think TST power 5 on top of SW9 is just too much duration and it's a point of diminishing returns on my particular setup. YMMV