fuel pump pressure bypass

[coltboostin]

I want to know if anyone knows if the stock turbo fuel pump has a fuel pressure bypass in it, and at what psi does it begin to bypass fuel? Also, what if any bypass does a Walbro 255 have?

 

[TSIfreek]

All fuel pumps have by passes in them. The 255 by pass fully opens at 80-85 PSI but starts opening sooner.

 

[coltboostin]

cool, becuas eI was just wondering, but I would really like to know if anyone knows about the stocker, b/c a freind of mine is runnign one with a command flow and we need tp know what we can push it to.