I just started doing AutoX and I'd been running with Nitto NeoGen 215/45/17 with 40 psi front and 36 psi rear. It worked fairly well to me, but in the end they were just some used-up all weather tires that kept me from going too fast into the corners.
So now I've just got myself a new set of Falken Azenis R-615 225/45/17 dedicated for AutoX. Does anyone have experience on what tire pressures to use on these tires?