( my knowledge is mostly related to the 4efte engines) so keep that in mind.
Now as a comparision, 4efte turbo engines (with a ct9) run 295cc injectors and can hit 9psi or so stock, and be modded to hit 13.7 psi with an electronic boost controller, such as a gfb geforce 2,
so i would assume that 312cc injectors would be perhaps the minimum someone would run to get a "minimum" safe tune down the line on a 4efe+t with a td04, more popular sizes for that are, 330cc to 460cc
( granted its best to have an ecu for this to get the most out of it )
However. i will point out unless you have said, Electronic boost controller, OR a standalone ecu, you will probably have issues with fuel cut
As for the pump, if you care for the car and do not want any Hp limitation down the line, or sudden failures, i would upgrade to a walbro 255/lph
( another thread related to injector size and what-not is here )
https://www.toyotagtturbo.com/commu...-cc-are-standard-for-starlet-injectors.46994/