Lost Type R

Here are my options.... Im running a complete drag kit on an AFC hack and soon to be tuned on an AEM EMS on friday. Heres what I was thinking...im planning on running 10-12 psi of boost on 91 octane.... i have a set of 680cc injectors and maybe i was thinkin of jus swapping those in right when i get to the dyno. What confuses me is... will i need to swap out my injectors in order to run 10-12psi or will my DSMs be able to take that much... i know there is a formula to see how much the injectors can max.. but my math is killing me right now. Another thing that bothers me is.. if i set the boost at 10-12 psi ... will my internals take it if i dipp into the high 300whp range? Im really relying on my tuner at the moment hoping that he knows what he is doing especially on that gawdforsaken 91 octane.