few questions about stock fuel system

[NeGaTiVe KaRmA]

what does the stock fuel pump flow? is there a difference between s13 and s14 fuel pumps? and max pressure? what is the static pressure that stock injectors run at? what does the stock fuel pressure regulator regulate pressure at?

thanks.

[bruinbear714]

what does the stock fuel pump flow? is there a difference between s13 and s14 fuel pumps? and max pressure? what is the static pressure that stock injectors run at? what does the stock fuel pressure regulator regulate pressure at?

thanks.

1. Not sure, but it's enough to run a T3/T4 turbo @ 7lbs all day with larger injectors.2. Same pump, different pickup sock/filter.3. I wouldn't run anything more than OEM fuel pressure unless you replaced the fuel system.4. Somewhere between 36-44psi depending on vacuum on the FPR.5. See #4.

[NeGaTiVe KaRmA]

what about an 8:1 fmu instead of bigger injectors? because i am actually gonna go with a t3/t4. and as a starter setup i was gonna use an 8:1. or my brother said he would sell me his rising rate fuel pressure regulator since he is going with an aem fic.

[Chris28]

Get a larger pump if you are going with the FMU setup. The fmu will require the pump to put out psi past it's efficiency range. Result is the more you boost you make the leaner you get. It might work for a little bit, but it's basically a given if you are going FMU then you get a higher capacity pump.

[NeGaTiVe KaRmA]

sounds good, thanks for the info. i dont plan on running more than 7 ibs or so anyway, so like 230 hp.

[AZ89two4Tsx]

Just get a Walbro. They're selling them on here new in box for like $90. Upgrading the fuel pump should pretty much be a given when adding boost.