what is your tubular psi?

Depends on the construction of the tire (Cotton/Nylon), surface to be used on (Road/Track), type of race (Crit/TT), width of tire (20mm/22mm), and weight of rider.

I am riding at 100 psi front - 105 psi rear on Conti Sprinters.

I race my Conti Comps at 150 psi. The high presure just seems to handle beter and hold a higher speed. It might just be me but thats what I'm use to and don't mine the slightly harder ride.