I have my 11.8c/r ls/vtec running 52psi with vacuum connected just to keep from running really lean, not sure if this is normal psi??? I have no engine management whatsoever except a vision chipped p28... GSR cams, milled head, decked block, .25over ITR pistons....

 

You could drop it down a bit. I got a few extra top end ponies by droping the fuel pressure from 40 to 37 with vaccum. This is on a B16 with 11.2:1. A dyno will tell you the truth.

 

Are you running stock injectors? I know this guy who has 12.5:1 c/r lsvtec and he's using 310cc injectors at 50psi.

 

look one of my friend is running a b18c5 with the same c/r you got and hes runnig a holley 255 fuel pump at idle his fuel pressure is 46 with 244 injectors blueprited