1 - Decide what power you are aiming for
2 - Find an injector calculator on the net
3 - Plug in power, cylinders and injector size and see if they are enough
4 - ???
5 - Profit
Though my guess is they will be a little on the small side. ZE injectors at 365 or 3S/7M injectors at 440 are easy, bigger options.
Hen