For the slab, probably the max, but any other time make sure IMO that the tires are equal in pressure or the rear is lower. I wouldn't want to be in a corner hard and have the front wash out before the rear. I'm not an expert in a dayum thing, but that's my thoughts.
I run the Michelin RD 3s, on the interstate or long rides I normally go with 42, but when I get in the curves I run 38 to 40. I ran one srt of RD3s at 36 on the skyway/ gap and they wore out fast. normal is around 8000 miles for me running 40 to 42.
never had the ability to accurately put air in as i dont have a compressor at home and the only place with free air i can barely reach the stems....still need to do a 90 degree stem set up.