I run the Sumituno HRZ 11 like your saying. With a bit of heat for track work there not bad, (1.94 60's), and i know a quick VX that runs quick with them as well. But now with more power they still spin alot, so i'll be trying a different tyre next time. Im purely going for traction. Maybe i have too much power that ant street tyre will not hold the rear end down, i dont know until i try i guess. But first gear is a joke now!!