Yes, some tires don't have the UTQG rating printed out. Tires made in Indonesia for local Indonesia market often are missing this. Long time back my old Dunlop Dignos and Bridgestone Potenza also did not have them.
A 1jz wid 264 cams, if given a t04R 2.5"turbine wheel,coupled wid 0.78ar t4 turbine housing how far would it takes roughly to spool up to..err.. lets say 1.5bar? would wanna "agak" where would the powerband range...