I have found that the tire can determine the pressure. I am running high end Vittoria tubulars on my Masi and started the pressure at what I ran when I rode the bike with the same wheels but FMB tires, under 100 psi. Running the FMBs at that pressure, the bike was lively. Running the Vittorias at below 100 psi, the bike felt sluggish. It was only after I upped the pressure to over 110 that I found a similar responsiveness in the Vittorias.