I've got 295 BF Goodrich KD's for rubber. But it still spins in 2nd unless it's super hot out, or I drop the boost a bit. I use my AVCR to ajust the boost per gear, depending on the conditions. If it's summer, I run 12psi in 1st, 22psi in the rest of the gears. If it's winter, I have to run...