SUP guys im about to boost and i got a 12:1 fmu and a walbro 255 fuel pump...do i still need bigger injectors?...thanks

94 teg LS...<U>plan on running max 8-9 psi on stock internals</U>

 

Personally, even with only 8-9 psi, I wouldn't run the FMU setup, Hondata is affordable enough to make it a viable option. As for the fuel, a 255 lph pump might be overkill, a 190 lph should do the trick. I would run 370cc injectors and an adjustable regulator just to be on the safe side.

 

so i cant use stock injectors?

 

255lbh is fine. It wouldnt be overkill, since he wouldnt have to upgrade the fuel pump when he feels the need to increase boost. Excess fuel would just recirculate to the tank anyway. But yes, you do need bigger injectors. U dont even need a FMU if you have the 255lbh pump and bigger injectors. Gettin a adjustable fuel pressure regulator is also a good idea.

 

you really expected to skip this important part?
good luck with it...