FSE Rising Rate FPR from RPW *Updated - PICS*

**Fishboy55** · 08-25-2002, 09:18 PM

Hey kids,

I just finished installing the FSE rising rate FPR from RPW, available from their normal distribution dealers. All I can saw is WOW! It really makes a difference under normal driving conditions It smoothed out all of the flat spots and hesitation that I experienced after installing my headers. I've currently got it set for about 44PSI. The only downside I can attribute to the unit are the installation instructions, which are a bit sketchy. It's not too tough to install as long as you don't make the mistake I did. When looking at our fuel rail setup, the fuel comes into the fuel rail, runs past the injectors and then runs through the FPR and back to the tank. Although this seems ass backwards, that's the way it is.

When you install the kit, you'l keep your existing FPR and install the new one. The new FPR will overide the stock FPR. You'll need to put a "T" connector in the vacumn line to feed both the stock and the new FPR. The rest is pretty easy. Your existing return line will become the inlet line to the new FPR and you'll run a new hose from the outlet of the new FPR back to your fuel rail, where you disconnected the original return line. Then split the vacumn line to both units, and you're good to go.

Now I know some of you are going to ask me for a tutorial, but in thinking about it, I don't plan to write one. There's too much liability involved with the fuel system and I don't want to be responsible for anyone getting hurt in case I leave something out of the directions by accident. I'd feel terrible if anything happened. The one thing I will tell you is to be sure and remove your fuel pump relay and start the car to release any fuel system pressure before you disconnect any fuel lines. Secondly do all your work with the battery disconnected for safety. Finally, get the optional pressure gauge that is sold with the unit so you can easily know what you raise and lower your fuel pressure to as needed.

Matt at Vision Imports and David at RPW can answer any install questions you might have. As far as mods go, this is one I highly recommend.

Chip

Black2k1GTZ · 08-25-2002, 09:54 PM

Ive been waiting to hear about this...god job Chip. Do you have any pictures of it installed??? Also how much was it and how long did it take to install it???

Marc :mg:

**Auto-9** · 08-25-2002, 10:07 PM

Hmmm...if we're already running a bit rich though think it's still necessary for the new FPR?

**TJC** · 08-26-2002, 03:10 AM

Great job Chip on the report. Lots of ppl been looking for a decent one to compensate for the flat spots.

<div class='quotetop'>QUOTE(Rallifan)</div><div class='quotemain'>Hmmm...if we're already running a bit rich though think it's still necessary for the new FPR?</div>

It is a rising rate FPR so should adjust accordingly to your throttle.

**Fishboy55** · 08-26-2002, 07:24 AM

Marc: I'll try and take some pics tonight and post them. As far as time it takes to do the install, I'm slower than normal, So I would say between 30 and 60 minutes. My price was discounted directly from RPW because of my assistance with the header prototype. I'm not sure what the price is from Vision or Phantom or the other RPW dealers.

TJC: Thanks for the compliments. It really does do the trick to smooth out the fuel curve.

Ralifan: Yes, it's a rising rate regulator, so it should adjust to the throttle position and deliver fuel as needed without changing the A/F ratio too drastically. I'm going to watch my gas mileage for the first tank and see if I notice any major differences.

Chip

**Danger DANJ** · 08-26-2002, 10:02 AM

So would you recommend this over an Apex SAFC?

Is there any eletrical work that has to be done or just messing around with the fuel and vacuum lines?

Also, how big is the optional pressure gauge? Can it be mounted in the empty pocket of the console inside the car?

**Fishboy55** · 08-26-2002, 10:29 AM

<div class='quotetop'>QUOTE(Danger DANJ)</div><div class='quotemain'>So would you recommend this over an Apex SAFC?

I think they serve two different purposes. The SAFC allows you to actually tune the mixture, while this allows you to adjust the pressure to the injectors. I'm not quite sure how the SAFC works, but I get the impression it's more sophisticated.

Is there any eletrical work that has to be done or just messing around with the fuel and vacuum lines?

No electrical work at all. Just the fule lines and the vacuum connections is it.

Also, how big is the optional pressure gauge? Can it be mounted in the empty pocket of the console inside the car?

The pressure gauge is small. maybe about two inches in diameter. I haven't measured it. I suppose you could mount it in the cockpit. It would require you to run a hose from the brass fitting on the FPR into the cockpit and make sure the hose has a fitting on the cockpit end to accept the gauge. I wouldn't recommend this, however, because the gauge is driven by the pressure of the fuel , so you'd potentially be putting a fuel line inside the cockpit. That sounds like a recipe for disaster. Also, the adjustment is directly on the FPR, so having the gauge attached to it makes adjusting easier and more precise.</div> Hope that answers your questions Dave.

Chip

Black2k1GTZ · 08-26-2002, 10:34 AM

Dave if you wanted to, I guess you could use something like an Auto-Meter Air/Fuel guage to measure it...you would get an accurate reading...the guage on teh FPR would allow you to measure the fuel pressure and the A/F guage would allow you to see how it is mixing together...if its leans or rich.

Marc :mg:

**Danger DANJ** · 08-26-2002, 01:25 PM

Oh, I see. I thought the gauge was something you needed to keep an eye on when driving the car. I realize now that it's just to give you an accurate reading of psi when you tune the FPR. Thanks.

**Fishboy55** · 08-26-2002, 06:42 PM

Here's a link to pics of the FPR installed on my firewall. You can't see much, but you can see how the gauge is integrated into the regulator. The silver crown nut on top covers the adjustment screw. The red line is the vacuum line going back to a "T" connection from the stock FPR.
CLICK HERE

Chip

**Mitsiman** · 08-27-2002, 03:59 AM

The FPR units are used to acheive a different purpose as opposed to a AFC controller.

This is more to sort out the physical feul pressure to injectors on hard acceleration that can be lacking. An AFR unit can open the injectors more but if there is no fuel pressure behind it ....................

The FPR can also richen up the fuel curve by raising the fuel pressure as well but this is a crude form of enrichment but good for very small changes at a minor level. Standard pressure is 38 psi at idle and I rarely recomend going over 45 / 48 psi at idle. Any more than this and yuo really need an AFR unit.

The FPR is also good for when an AFR unit runs out of adjustement - richen up the FPR unit and then readjust all your fuel curves easily.

David Thomas
www.rpw.com.ayu

MnGalant · 09-05-2002, 07:29 PM

Performance wise how well is it. If it will get rid of my hesitation that would be cool as hell

**Fishboy55** · 09-05-2002, 10:32 PM

<div class='quotetop'>QUOTE(MnGalant)</div><div class='quotemain'>Performance wise how well is it. Â*If it will get rid of my hesitation that would be cool as hell</div>It's damn nice. I can tell the difference. I never real had hesitation, but now I've got zip that I didn't have. I'd describe it as instant throttle response. Well worth the investment. Thanks for the recommendation David.

Chip

**pinoyesv6** · 09-05-2002, 10:36 PM

<div class='quotetop'>QUOTE(Fishboy55)</div><div class='quotemain'><div class='quotetop'>QUOTE(MnGalant)</div><div class='quotemain'>Performance wise how well is it. Â*If it will get rid of my hesitation that would be cool as hell</div>It's damn nice. I can tell the difference. I never real had hesitation, but now I've got zip that I didn't have. I'd describe it as instant throttle response. Well worth the investment. Thanks for the recommendation David.

Chip</div>

i can too chip .remember when u first got the headers and we went to the parking garage. and then remember what happened yesterday...alarms right and left hahahhaha

**Fishboy55** · 09-05-2002, 10:39 PM

LOL Allan. I counted 4 before we got to the top level. I think we're good with the intake. All I need now is the pipe and the right bends/angles.

Chip

**pinoyesv6** · 09-05-2002, 10:40 PM

<div class='quotetop'>QUOTE(Fishboy55)</div><div class='quotemain'>LOL Allan. I counted 4 before we got to the top level. I think we're good with the intake. All I need now is the pipe and the right bends/angles.

Chip</div>

isn't that what u needed in the first place hahaha. when do u leave for florida? maybe we can get thing done b4 u go...or something like that

**Fishboy55** · 09-05-2002, 10:47 PM

Saturday morning at 10. I don't think we've got time. And no, what I meant was i got the filter mount and the joint to the injen figured out, I think. Lowe's was out of pipe so I gotta go to Hechingers. We'll do it when I get back or something.

Chip

**pinoyesv6** · 09-05-2002, 10:49 PM

Originally Posted by Fishboy55

Saturday morning at 10. I don't think we've got time. And no, what I meant was i got the filter mount and the joint to the injen figured out, I think. Lowe's was out of pipe so I gotta go to Hechingers. We'll do it when I get back or something.

Chip

what size pipe chip. i might have some at home...anyways is home depot lol...

**Fishboy55** · 09-05-2002, 10:52 PM

leave me alone...it's late...LOL Hechingers....what a goof....3 inches...same as the intake. rubber joiner to new pipe...

**pinoyesv6** · 09-05-2002, 11:00 PM

Originally Posted by Fishboy55

leave me alone...it's late...LOL Hechingers....what a goof....3 inches...same as the intake. rubber joiner to new pipe...

nm don't got it. but remember there are 3 different types. they got the regular ones...there is like a sewer grade or something like that. but for maxiumum airflow, minimum filteration they got preforated hehe. if u wanna be cheap haha. get the preforated, slip a couple layers of pantyhose on it. and not only is it your intake pipe but its ur filter too