Ok im sure im gonna catch **** for asking this but if you cant give me a decent answer please dont say anything....

i am running an FMU for management on my Y8 del sol, i am running a junkyard kit that i put together and running about 5-6psi on a t25...I am going to buy new injectors and my question is... If i buy 440cc injectors and put them in without having like an AFC or anything like that to controll them would turning the fuel pressure down to around 18-20 psi work? I plan to keep running the fmu after i buy the injectors but i will go down to like a 3:1 or 4:1 disc but i just want to know if i will idle alright and be able to drive normal while not in boost with that big of injector if i set my static pressure alot lower then stock?

 

it wont idle right, too much fuel, i've seen 310's with an fmu but thats even too much