You say you are on "street tires", what street tires?
If you are sill running on the OEM Eagle F1s, I am amazed you did that well. The F1s are POS, in my humble opinion. To pull down a low 13 quarter mile on them would almost be a super human achievement.
I am now running the Micheline Pilot Super Sports, and hooking up is waaaaaaaaaaaaaaaaaay easier.
I have some observations/questions about your "NLS" function that is incorporated into the WOT Box.
1. I suspect that the "NLS" function the WOT box runs is really a "Power shift" function. As in, all it does is hold RPM at a specific point during the shift (like the new C7 "rev matching"). Is this correct? Or is it a clone of the GMPP "NLS" function? As in it suspends spark for .2 seconds, keeps the BOV and WG closed, and phases the valves; thereby allowing full boost to be maintained going into the next gear. (Hence the reason that the GMPP NLS backfires at every shift; because unburnt fuel is hitting the CAT)
2. Why did you select 4000 RPM for the shift point? Torque does not drop off until 5500ish on these engines. And peak torque is not reached until 3600 RPM. With the GMPP NLS, it engages at the 6000ish RPM range, so when you hit the next gear you are well into the Torque curve again.
Also: Does your WOT box have "Launch Control"? If so, experiment with different RPMs. Even if you don't have LC, you need to experiment with different launch RPMS. Some folks have become adept at the old "three pedal launch" to build pre launch boost. But I have never liked doing that. This is something that the automatic transmission cars have an advantage on, because it is very easy to build pre launch boost when you only have two pedals to screw with.
With the manual tran, it is just to fricken problematic, in my humble opinion. Besides, our cars spool up damn quick anyway.
For me, 1500 pre launch RPM was about all I could ever do, with the OEM F1s; and not just completely burn the tires down. I haven't played with the new PSS tires to know for sure where it hooks, yet. But, I definitely seem to be able to run it up into the 2000+ range, and not become completely counterproductive.