A little adventure of mine, for thoes who are interested:

I had my car dyno-tuned last August.
The base fuel pressure on my Autometer gauge (installed under the hood) read around 40psi (or higher if I recall correctly).

That gauge blew up and dumped fuel all over my coil pack
So, I got another one - which did the exact same thing!

Some time passes without a FP gauge.
I finally put a B&M one in and it reads just under 20psi - WTF?!
Not believing this, I put in a $10 gauge from CISCO. This one also reads just under 20psi - WTF?!
So I trade the B&M gauge for a Russell (liquid filled). This one also reads just under 20psi.

Now, I figure I'll turn the FP up to 25psi and see what happens.
Crappy idle, black smoke @ WOT, A/F gauge reads rich @ part-throttle.

When I review logs of track runs, I see knock at the top of 3rd - eventhough supposidly my fuel is fine. I've always attributed this to having too much timing - due to a low airflow signal - due to my HKS S-AFR being leaned out across the board (as I had assumed).
That theory can go out the window now. There's no way my S-AFR could be so lean with such low FP. So for the first time I take a look at what's set up in there:
Below 3000rpm, generally +30% correction.
Above 3000rpm, generally 0% correction.

Next time at the track I'll turn the base FP up and re-tune with a wideband.
Hopefully this will take care of some of that knock up top.

Mods to mention:
720cc injectors, Walbro pump, ChargedAir AFPR, HKS S-AFR,
9:1 pistons, 17cTD06 turbo (similar to a 20G), FMIC, 3" turbo-back, 2G MAFS.