I run 36 lbs front and 40 lbs rear all the time with my 18" PS2's and I dont track my car, just for road use. I think I got that redommendation from someone on the fourm a while ago.
Any lower pressure than that and the sidewalls feel too flexible on hard cornering. Having gone through a pair of PS2's running the tires at that pressure, I found no unusual wear patterns, just the usual wear on the inner edge of the tire from the allingment setup.
Ed