ok I tried to read corbins info, really I did, but its way over my head.

I have a star stage 2 set up, bottom end is going on at the end of this month. I am getting a vortech S-FMU to replace the FPR that came with the star kit, what size injectors should I get (440s?) and how much boost can I SAFELY run (13psi?)

any and all help is appriciated.

Thom

What I've calculated (same setup as you) is running ~13.5 psi. Not that you can get that accurate, but... Using 440's and a 2.6:1 riser in the S-FMU (it's very close to one of the disks that comes w/ it) and the walbro pump that came w/ the kit.

Of course if you get the larger walbro pump or larger injectors or both, you can turn it up more.

Some might tell you differently b/c the fuel calculations are not nearly a straightforward science, but I prefer to be on the safe side. I think these are fairly safe settings.

you better have a built bottom end if you are going to push those psi numbers.
but yeah with 440's nd the 2.70 rise disk you should be good to go. I'm going to run 15 psi on that set up and a built bottom end.