r/t sucks ass... car is making plenty of power the car is 30+ on the back half, I think just with practice and tire change you should be able to go high 11s - 12.0 realistically. What kinda DR... Nittos no good... BFG KD okay... you need something like a M/T Street drag if you goto a bias tire make sure you get some for the rear. If you mix a bias with a radial the cars like to sway a lot at the big end.