I'm doing a 2.3 and GT35R in a couple of weeks and i'm going to be using 880cc injectors and a Walbro. The rest of the fuel system will be stock. But I will be using alky injection over 22 psi.

I know everything will be fine on 93 octane @ 20 - 21 psi. But how much can I turn the boost up before I run out of fuel? Which will max out first, the Walbro or the 880's?

Also, i'm not sure if it will make a difference, but my head will have a mild port, Ferrea oversized valves, springs & retainers, and HKS 280's.

 

My calculations show both the walbro 255lph pump and 880cc injectors to be good for at least 600bhp (or at least 550whp). This assumes you are running no more than ~30psi boost and if you have standalone, it has the correct low impedance injector driver pack.