In my faster days I weighed ~160 and rode 23mm Tricomps at 140 lbs. Those were fast tires. If you want to go beyond conjecture and read about what real TT champs use for tire pressure, there's a good discussion here: Ideal TT tire pressure - Training advice - Timetrialling Forum

Or you can go with the tire seller's roll down tests . . .

It's true that lower pressures are faster on Texas chip seal, but that is not true on smooth roads.

Edit: doing a little research, the pros ride road stages, front-rear, at ~115-125 and TTs at ~135-150. With some variation for personal preference.

2nd edit: BTW, those high pressures are on my carbon bike. I have a CAAD9 which becomes almost unrideable at pressures over 100.