Slicks - Where do I start?

Just got a set of part worn slicks for track days, could anyone help with a starting point on the tyre pressures I should start with.The tyres are Yoko fronts (190 / 580 R16) & rears (230 / 625 R17).Thanks.

25psi hot all roundMake sure that you warm them up before you start playing too hard.Have you had the rose joint replaced in the rear suspension?