my old man suggested that we can put fifth injector close to the throttle butterfly (better is behind to prevent gas dropplets on butterfly), injector can be controled by set of diods to pulse with every other injector (so to simply give fuel evenly to all bores).
He still speaks about need to increase fuel pressure from basic 3 bars as it is for athm intake. He says that with boost it wont go well. So adjustable valve, he thinks.
Isn't this solved by 5th injector? More fuel without overpressure (I am not happy to increase fuel rail pressure, as it may cause backlash to all rubber connections and rupture it, as I read).
Sure, 5th injector would be switched on only by +pressure in intake, we can do this any way (starting with pressure sensor switch measuring turbo output pressure, set to optimum boost level we want to keep like from 2 psi up to 8 psi?).
Next thing I can't get correctly, somebody told me that injectors need fuel to cool down properly, where my old man says it's not needed (now I wonder who is right), as we can keep inejctor runing even without fuel, so we will only regulate fuel input by setting valve to read intake pressure and switch fuel on/off, no need shut power in injector. But that sounds very crude to me (but simple to make with proper valve)...
Damn if I could get photos and drawings from really tested set up... if anybody can do it.
Next thing he mentioned as beneficial was that we can put injector right to trubo compressor output, there warmer air before IC will blend fuel fine way and as well it will act as coolant of air... I am not so happy to have fuel vapour runing all way thru IC and tubes (could it cause harm to rubber? or not? but what about possibility of explosion?)