[ultraflo]

How much pressure were you running in those Hoosiers? ...were you rolling out of the water box at about 3/4 to full throttle until the tires grabbed the track surface and chirped? Sounds like you need to run around 10 psi, or start letting air out 1lb. at a time for each pass until you find some hook off the line while still maintaining some top end stability... just be sure to make one change at a time in order to keep track of what does/doesn't work.