just curious if anyone has this, i know someone does, just can't remember who

anyway, my plan is to build up my n/a setup with parts that i can reuse on my turbo setup (emanage, rrm header, than kinda stuff). i know i want a rising rate fuel pressure regulator on my turbo (specifically the rpw fse one with gauge), and correct me if i'm wrong, but it works fine on n/a applications too, right?

if so, how is it adjustable from n/a to turbo? are there discs for each application, or is it just dependent on vacuum pressure? what would the correct psi/setting for n/a or turbo?

 

it works for both NA and turbo. if used NA, it delivers 1.7:1 psi fuel for psi vacuum. under boost, it delivers 1:1. you can use it for both setups. its works off vacuum so you don't need disks or anything. i have it.

for most NA use, set it to 36-38 psi as thats stock. for boost apps, it will depend on the injectors you get. i doubt much that you can use stock injectors with this on boost. it won't be enough so you'll have to upgrade.

 

awesome, just the answer i was looking for

yeah, i realize with an fmu you can do a small amount of boost on stock injectors, but i want an fpr for several reasons, so i'll have to upgrade injectors once i'm boosting


edit: btw, since you have it, its a simply bolt up install, no messing with adapters and running to home depot to get fittings, right?

 

It is a bolt-on affair....

Glad to see the choice of a 1:1 and bigger injectors . Too many people, it seems, rely on FMUs and run their puny stock injectors past max duty cycle.

 

Whats a good size injector to have for both N/A and FI? Ours stock are 260 or something right?

 

yup, thats why i'm piecing my own fuel and tuning parts with rrm's hacker kit.


as for injectors, 330 i believe is the favorite for turbo, although for my goals i'm going to be running 550's

 

235cc

 

I think 240cc is the stock Lancer injector size.

 

alright, i was doing a bit more reading and now i'm more confused:

is the fse rising rate or rising rate and boost sensitive?


either way, what determines between the 1:1 or 1.7:1 ratios? a screw on the fpr or what?

i'm a bit cautious cause i want an fpr that will serve my n/a purpose now and be compatible with my turbo setup in the future so i don't waste money

 

i know that a RRFPR will have a vacuum line on it so as the boost increases it will recognize that and accordingly slow the return of fuel back to the tank and thereby keeping more fuel above the injectors or in the rail

some of them have a screw but if it has vac line adjustment it adjusts on its own

thats the one i used on my last turbo car....worked well

 

^^ So would that also work on an N/A Car? I think I'm going to same route as Green - doing the N/A mods, but then later going FI.

 

well, i know this works on n/a and turbo, i'm just not sure HOW it works, so thats what i was asking

 

Ah, well someone on here has to know.

 

The FPR is only rising rate NA. When it sees positive pressure, it acts like a 1:1 regulator, like most other FPRs out there. According to RPW and the manufacturer (YEARS ago when I had mine), it is NOT rising rate under boost conditions.

The FPR does have a screw on it, though.

Here is some literature from the manufacturer, hope it clears up the mud.

 

I was also reading about this on RPWs site: http://www.rpw.com.au/Performance%20...subishiFPR.htm
According to them, it works for both setups: N/A and FI