Sup Folks I know its been a while since I posted. I've been getting some drift events going down here in Houston. www.dailydrifter.com
If you're in the area come watch the next one they're a blast.

Ok now to the Max. I may take the record on turbo projects, huh?
So some of you may remember me and the Haltech didn't get along.
So I went ahead and went the route most have and got the SAFC2 (for $250) and I already have a fuel reg.

First off, with the Haltech all I worried about was making sure I had higher fuel pressure. So what I did was connect the hose from the stock FPR to the High FPR. then back to the tank.
So it went tank->filter->fuel rail-> stock FPR -> high FPR->back to tank.

My reasoning was if the pressure got too high for the stock FPR it would open and shoot it to the high FPR where I would control how much pressure I really wanted.

But since I want to lower the fuel pressure now because I have a stock Ecu with a walbro pump and z inj. should I remove the stock FPR to make sure I can lower the pressure with the High FPR?

Now my second question. If I lower the pressure with the adjustable FPR
how will I get the higher fuel pressure I need when I get into boost.

I'm not a newbie when it somes to working on cars but I don't know much about how the adjustable FPR's work.

Third question- What's the stock pressure and how much lower should I go when at idle?

I guess I didn't really deal with these issues before because I had a tuner and was using Haltech. I'd like to know what's going on a tad more now.

Sorry so long.

 

a pic of the stock fpr and the adj.fpr (the red and blue box to the right) when I started.

 

To raise the fuel pressure under boost you need a rising rate FPR or FMU, like the vortech FMU or Cartech. The Cartech is adjustable, while the Vortech uses "discs" that you must swap out to change the gain ratio.

I think we idle at 34-36psi.

 

Hmm ok I'll have to find out if what I have is a FPR or FMU the above pic shows a vaccum so it may use vaccum to tell. I'll check it out today.