A lot. My 60' times didn't improve only because I wasn't used to the tires yet. It's funny because on my street tires, I have to feather the clutch out so that I won't just sit there and spin. Well, when I did that with the new tires it bogged the crap out of the car. :chuckles:

I only made about 5 or 6 passes with them so it's just going to take a bit of learning to get them figured out.