I know the standard injectors on the coupe 16vt is 384cc . I have fitted brand new blue bosch 470cc ones and would like to know what power they can handle up to before maxed out . The reson why i ask a friend is rebuild his Lancia Evo 2 engine fully forged and is looking for around 320 to 350bhp . Will these be able to handle that power or will he have to go to 550cc injectors

What turbo is being fitted?

He does not know at the moment . He did mention a hybrid of his own one

I think he may struggle with that power and injector size. Is there any reason he went for that size and not something larger?

You mean 470cc . He asked me as he does not have a clue what size he needs . Local engine builder is doing the engine . I advised him to buy the parts and he was quoted around 3k just for the engine build . I think he is way off and would need to double that

If he can, I would suggest he goes larger on the injector size. Might be worth pointing him in the direction of online calculators that can help.