I have gotten the best 60' when I had the dr's at 18 psi. However, it did start to hurt my mph, so I would start with 22psi and work your way down until you find a good balance between launch traction and maintaining a decent mph.
I run mine all the time, and I have about 15k miles or so on them. The dr's are pretty wore down, but I still will probably get another month or two on them this spring. They definitely hook better as they age, and from my experience they hook better on the street than at the track. To get the most traction out of them you'll need to do a pretty serious burnout and try to not let them get cold between passes.