about 0.7 0.8 i think mate some one will correct me if im wrong
I presume your forged if your going to attempt 1.5bar with a td04!!??
Ideally some sort of engine management will be needed...either the more popular Piggyback ecu's (emanages) or a standalone system (power fc)
Personally i wouldnt be pushing 1.5bar on a td04 without a good engine management system and a good map!
No injectors arnt too hard to fit but you would want to be farmiliar with the fueling system.