@ 2000rpm should be 35-65psi when warm.
I think you're better off not knowing.
Mine is shagged & is about 9-10 but I'm going to keep driving it till it dies.
Cold you want about 50-60psi, warm you want about 20-25psi all at idle, an engine can operate right down to 5psi or so although if it's that low somethings wrong!