Originally Posted by signes
47 cold? Please tell me that is a typo...
EDIT: Looks like that wasn't a typo. Seriously bad advice and dangerous to run pressures that high. 47 cold for a PS2 would wind up around mid-50s psi hot.
When I ran my r-comp Toyo RA1s (245/40/18F 305/35/18R) the optimum pressure was 32F & 34R. The wear was even across the thread. That is where alignment comes into play.
I used to run Bridgestone RE-11's on the track for a while, if I remember correctly the optimum pressure for those were about 36F & 38R.
The wear on the tires mostly have to do with your cars weight, suspension and alignment setting. As I said on my earlier post, carrying too little pressure will cause the sidewalls to work incorrectly, meaning the tire will roll on it's side and the steering feel will be numb.
I remember going out on the track with 22F & 24R cold on RA1.