Alright i got a B16 block no internals ITR head with STR fuel rail and holley FPR(43 psi) JDM DC 421 Apexi catback MSD blaster coil. Ive already ordered my walbro 255lph pump UR crank pulley just to power the ALT. what size injectors should i use. i was think maybe 270 or 310 but im not sure what the compression level is right now

 

OEM 240's or Prelude 290's for cheap ness and reliablility. Depends what you are tuning with and what you're plans are later. For that set-up though OEM's are just fine. The walboro 255 def. isn't needed for right now. I would hold off on install.

 

im in the process of buying a vafc. i wanna go hondata but im not sure how easy it is to use it

 

If you want to go Hondata then don't toss your money away on a Vafc. Don't get me wrong I like the Vafc(I have one), but Hondata is far more capable and both require a dyno and some experienced tuning.