Fuel Pressure Regulator, PSI setting ????? Options

[3TST]

OK, I'm in the process of installing my aftermarket fuel pressure regulator.
Installation seems pretty straight forward.
However, when I come to set it what PSI can I go to?
The manual states between 38-44 PSI as standard.
Can I increase the PSI over 44, if so to what PSI?

Also, what PSI can the standard Fuel Pump cope with?

Any help would be greatly appreciated.

BTW: I have a '97 ST with standard injectors, an Injen IS2040 intake, Denso Idridium spark plugs and Magnecor KV85 spark plug wires.

[3TST]

The AFPR (Adjustable Fuel Pressure Regulator), as the name suggests,allows you to adjust/regulate the pressure or the amount of fuel to the fuel rail thus the injectors.

The AFPR alone probably wont do much other than make your car run rich if you set the pressure to high.
It's an upgrade that I did with a combination of other things.

I read somewhere that to increase basic performance you need to upgrade the fuel distribution, air intake and ignition.

So, I have the AFPR installed with an Injen Intake, Magnecor KV85 leads and Denso Irdium plugs.
To make them work all together properly you need to adjust the Air/Fuel ratio hence why I got an S-AFC (Super-Air/Fuel Controller).
You'll also need to upgrade your exhaust system (Header, High Flow Cat and Cat-back system) to get rid of the extra gases better.
I have a Greddy SP cat-back exhaust (not fitted yet).

It's really a question of what do you want to do and where do you want to go?
If you're looking to Supercharge or Turbo later on these upgrades will help.

I didn't want to go the full SC/Turbo straight away because of the down time (and finances).
So I've decided to do things in stages.
I wanted items that I could "bolt on" myself and still use the car.

The next upgrade I would like to do is get a header and high flow cat, then an ignition module and coil (Crane Cams HI-6S).
Thereafter, I'm looking at upgrading the Fuel Pump and Injectors.
Then, when I have the finances, I'll go either the SC or Turbo route.

There are others on the board that are more qualified than I to answer your questions but I hope this helps a bit.