What is the proper Fuel Pressure as Measured at the Fuel Rail

Ok I have 48 PSI at the Fuel Rail and after 10 minutes I am above 30 PSI so I think all is well in that department. It just seems when I push the pedal for fast acceleration I am not getting that like it should be - likeit is not pushing the fuel as it should. I also have STFT & LTFT at +4 , +8 on both banks. No Vacuum leaks, New MAF, new VVT oil screens. My STFT follows the A/F sensors + / - (they are switching as they should) I have very little back pressure - so it seems the cats are not clogged. I have cleaned the Tbody assembly (removed and cleaned it), new PCV valve, air filter. oil filter of course (I change oil about every 4-5K). I am now wondering if my VVT cam gears need to be replaced ?

I was not as much concerned about the Fuel Pump as I am about the Pressure Regulator. A Pressure regulator on the other hand can be finicky.

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BTW: I have scanned the vehicle and I had about an hour with my brother who hooked it to his Toyota Scan tool. That is how I know A/F sensors are working and STFT followed the sensors as well, he told me there are no miss counts recorded int eh computer at all as well. He did not have much time and was stretching it by doing this check for me so he could not tell me anything else he did say based on his scan tool readings he thought the fuel pressure was fine - but I thought to physically check anyway.

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