I was planning on making my fuel pressure regulator adjustable. But now I'm wondering if I should or not.

I still have the stock unit which is putting out 39 psi @ WOT. I made some runs tonight to read my O2 sensor and came up with a consistent 900-920 mv at WOT throughout the RPM range.

Will bumping my pressure up do anything for me, or should I just leave it at 39psi as my O2 seems to be at what most people seem to think is what you should shoot for when increasing fuel pressure?

Suggestions?

 

The stock O2 sensor isn't accurate for WOT tuning, you'd be better off getting a wideband O2 ($$$) or reading the plugs... but if you can make your FPR adjustable, why not try it? It will give you another tuning aid.