I am not sure I read it but from your avatar picture i'm guessing you are running a slick of some sort.....a radial is faster and more stable at speed if you aren't already using one and the drag radial has been proven to be very very fast and stable and the adjustments and setup would be different as well.
I have heard that information, unfortunately I just put a new pair of Hoosier 30.5 X 13.5 X 15 slicks on the car, so I won't be making the change any time soon.
