Thats a great question Shelby, let me respond to it
Every year I make a goal for my E.T and MPH, last year I did 12's @113+ on the street tires, this year I did mid 11's @ 121 on the street tires, so next year my goal will be to do 10's @ 130+ on the street tires, perferably mid to low tens. So I am already in the process of planning getting my new short block going and also the Turbo Race kit is in the works with TTI. So you ask how fast will be fast enough? I say when I can run 10.00 @ 130+ on street tires and pump gas, that will be enough, cuase after that I will need twice as much saftey equipment and more roll bar installed and i am not ready to go that route. Oh and to also keep the Cobra as quite as it is now is part of my plan.