I have ran a best of 13. 03 @ 104, on #2, so far. My stock tires and 4. 10 rear have been holding me back. Plus a fuel pump that has been acting funny. I am upgrading to 315-75's this weekend, and a new fuel pump, so hopefully that will help out some. My other problem is defueling. I have a 2001. 5, with lots of power so I have a serious de-fueling problem, that is also hurting me.
The 12. 87 that i ran was my first run with the nitrous, very small jets, but all it did was make my defueling problem worse. I just need some tuning time again to get it all straight.
I think i have enough power to run in the 12's with the truck like it is now, then I will play with the nitrous and see how she goes. My other problem is that I race the truck just like I drive it, in other words the tool box is still full of tools, the tailgate and tonneau are still on also, and I don't play with the tire pressure either.
I believe there are a couple of trucks in the North East that have run 12's with a single turbo on # 2 only, but not positive.
Jetpilot, Snowman, and Mdmello all have very very strong single turbo trucks that would be very close, if not in, the 12's also.
Ted