WarmAndSCSI

Adjusting fuel pressure will never make you a bit of power unless it was seriously too low to begin with, thus hampering proper fuel atomization at the injectors. Otherwise, you'd effectively be richening the mixture by increasing fuel pressure, which is never good for power unless you are running too lean.

Stock fuel pressure is probably around 40 psi at curb idle, so about 50 psi at WOT. Unless it's falling somewhere way outside of that, no power could possibly be gained. I suppose it's possible to lean out the mixture and gain a fraction of a hp before negatively affecting the efficiency of the engine due to poor atomization.

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