Kumho Recommended Pressures?

[Scott & Glenda Meyers <autox@earthlink.net>]

They are 225-50-15 Kumhos on 6x15 rims.

The car is a '92 240 SX SE at 2750#, rear drive, IRS, camber challenged in
front (damn those inconsistent Japenese engineers.....).

Deceased G-Farces liked 42# front, 37# rear until untimely and early death  :-(


First Question - Could anyone give me ballpark F & R pressures to start with? 
I have a pyrometer to help as the event progresses.


Second Question - can one "read' the sidewall on Kumhos for 'scrub' as a clue?


Informed advice appreciated. Event is Sunday, tomorrow. Tires have been heat 
cycled.....

Thanks,

Scott Meyers