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

[trouble_st]

[Silver94CelicaOw...]

While we're on the topic of fuel pressure regulators....Would an FPR deliver more fuel by the increased pressure, and would a FPR, an ignition unit, and proper guages be a good route to go for N/A tuning?? Or would i get better results if i got an S-AFC, and possibly an ignition unit so i could run rich on that, then compensate with the ignition upgrades?

[west_minist]

[FallenHero]

Stand alone systems just cost so much... If I were doing an engine swap I might get one, but not for flexability. Get a Super AFC.

Jon

[Silver94CelicaOw...]

So what exactly will a fuel pressure regulator do for your engine??

Sorry for the n00b sounding question, i just want to understand this better.

[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.

[Silver94CelicaOw...]

Thanks vphmc, thats the kind of response i was hoping for. I think i have a good understanding of how the AFPR comes into play now....i was just wondering what a good tuned N/A engine setup would be, and as far as i know the way to go about doing that is to increase fuel delivery(AFPR) and the power of the ignition(ignition box, coil)....so now could i just install a AFPR and ignition system and have it tuned properly by a shop and be done, or do i need to use a S-AFC to help integrate the higher volume fuel delivery with the air??

[3TST]

This is where I would start ...
First of all, you can get what I call "bolt-on" no tuning parts,
that is, parts you can bolt on without having to tune them.

I'd start with an Air Intake either RAM or Cold Air.
Next I'd get decent set of irdium plugs (Denso, NGK, ...).
Next a set of leads (Magnecor, Nology, ...).
Then you get an AFPR. Adjust/set it to the factory PSI settings (38-44PSI) to start with. Adjust the PSI up or down depending upon the color of your plugs - they should be a light brown/tan color if the engines running correctly.
I would then go for an exhaust.
Just with these items you'll notice the difference in acceleration.

Later on you can get an ignition module (+ trigger adapter) and coil - there expensive c$250-300.

Thereafter, you start getting into the Tuning parts.
The S-AFC falls into this category. (Having said that you can fit one without tuning it, which is what I have done).
The S-AFC connects/wires up to the ECU and is used to convert/override the settings sent by the sensors of the engine in order to optimize the Air Fuel ratio dependent upon what you have fitted (intake, AFPR, ...).
This will need to be done by a shop with a dyno facility.

Bear in mind that once you have it dynoed the majority of items you add afterwards will mean that you will have to have the S-AFC re-dynoed.

I suggest getting all your parts, fitting them all and then get the S-AFC dynoed.
(That's what I'm doing).

Bit of a long reply but I hope it helps.