stock fuel system+walbro 255...add boost?

[RedGSX21]

Around town i keep my 95gsx to 10 pounds of boost. Im goin to the track this weekend and i am gonna be runnin 15 pounds on a stock fuel system except for a walbro 255. I have been playin with my high/low settings on my greddy profec b spec II and tuning to 15psi. I know that the max boost the stock system can hold is 15-16 psi, but at WOT i am creeping to 16-17 pounds so i let off before i can completely hold the pull. I know i am over runnnin my fpr and stuff but should i be able to do this? With the bigger fuel pump will it be able to sustain that must boost? Basically, with it hitting that much boost at the track only, can i try to hold the pull at WOT when i am racing or should i tone it down a little? Thanks.

 

[DSM90AWD]

Basically, with it hitting that much boost at the track only, can i try to hold the pull at WOT when i am racing or should i tone it down a little? Thanks.

I assume you meant "creeping" to 17-18psi (psi raises with RPM) and not "spiking" (psi momentarily over-shoots preset limit and then backs down)

Every car reacts differently to different levels of boost which is why you'll see the canned response "do you have a datalogger" whenever such a question is asked on this forum.

With the additional fuel supply of the 255 and the added cooling of a large FMIC the risks are greatly reduced but are still near the limits of the 450cc injectors so investing in a logger is really a good idea at this point.

Who knows, you may be able to turn the boost up even higher