besides my current motor and turbo issues, im tryin to replace my intank fuel pump. my fuel set-up consists of an inline fuel pump, vortech 12:1 fmu, and OEM intank fuel pump. i recently decided to upgrade my intank fuel pump with a warlbro 255lph, since a stock pump is costly. so i was talking to a guy at a shop the other day... and he told me i would need an adjustable fuel pressure regulator to adjust the psi at idle because of the higher fuel pressure from the warlbro. i was told i didnt need it from a few others. so im tryin to get a consensus here.

do i need to invest in a fuel pressure regulator if i want to upgrade my intank fuel pump to a high volume pump like the warlbro 255lph?

thanks in advance.

 

you'll need a AEM or Aeromotive.

If your cheap you can get the B&M and modify it per TOO.

My suggestion, get the Aeromotive.

 

No, you dont NEED an adjustable FPR. If you are going to use the same fuel pressure, wich I am assuming that you are seeing as how you are running an FMU and the FMU adjusts the FP based on boost requirements, then the factory unit will suffice.


Rob

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rjardy &raquo;</TD></TR><TR><TD CLASS="quote">No, you dont NEED an adjustable FPR. If you are going to use the same fuel pressure, wich I am assuming that you are seeing as how you are running an FMU and the FMU adjusts the FP based on boost requirements, then the factory unit will suffice.


Rob</TD></TR></TABLE>

then how is he gotta get his idle pressure below 55-60 psi??????

Can you say fouled plugs?

 

if the factory unit is in good operating order it "should" be able to regulate the extra flow back to stock values. But if it does not then yes he will need an AFPR, good point

Rob

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mista Bone &raquo;</TD></TR><TR><TD CLASS="quote">

then how is he gotta get his idle pressure below 55-60 psi??????

Can you say fouled plugs?</TD></TR></TABLE>


fpr controls fuel pressure... not the fuel pump...so if its a stock fpr the fuel w/255 high pressure pump the fuel pressure is still stock 40psi.

 

wrong, the Walbro 255 LPH HP pump flows more than the stock FPR can bypass back to the tank.

Been covered COUNTLESS times here.

 

Even the B&M moddified stock fprs sometimes need some extra help to regulate the fuel pressure at idle with a larger intank pump.
Yes you will need an adjustable regulator with that fuel pump.

I like that new Aeromotive regulator that fits on the fuel rail, it makes for a easier install than the usual Aeromotive regulators. Do they work as well as the other Aeromotive regulators? Do they hold up well after some use?

 

my fpr is stock with this pump and i have no problems attaining 14.7a/f at idle

 

i know lots of people using stock fpr sub 300 hp level even with upgraded fuel pump.

 

i added the walbro 255lph fuel pump and my fuel pressure at idle is at 60psi.

so you will need a fpr to lower the fuel pressure unless you want to run very rich.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93hb &raquo;</TD></TR><TR><TD CLASS="quote">i added the walbro 255lph fuel pump and my fuel pressure at idle is at 60psi.

so you will need a fpr to lower the fuel pressure unless you want to run very rich.</TD></TR></TABLE>

Same thing here! You will need an FPR.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by leadfoot78 &raquo;</TD></TR><TR><TD CLASS="quote">

Same thing here! You will need an FPR.</TD></TR></TABLE>


hey guys, im putting in my walrbro 255 this weekend, and all i have for fuel management is a vortech fmu. is this gonna be too much fueL?

set up

91 crx si stock oem fuel pump
jdm b16a
greddy turbo kit at 5.5 psi with vortech.

too much fuel?

 

Go tune it and see. Tunning is very important, I'm so glad I got my car tunned. It is really a big difference and worth every penny and the braging rights.

 

It depends on which stock fpr you have. The gsr flows slightly more, I am using a gsr with walboro high pressure in tank and I'm at ~47psi base. No need for complicating a working system with an aftermarket fpr.

 

really? Didn't know the GSR flowed more.

See people, learn something new everyday. You can teach a old dog a new trick. Just don't expect me to perform it!!!!!!

 

everyone seems to have mixed opinions. anyone with a LS turbo setup with a warlbro intank that needed a fpr? i need to know if a stock fpr will be sufficient.

 

im running a 255hp and stock FPR, but im using hondata...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mpir3 &raquo;</TD></TR><TR><TD CLASS="quote">im running a 255hp and stock FPR, but im using hondata...</TD></TR></TABLE>

that doesnt count! haha j/k

im wondering how hondata would work in adjusting fuel pressure during idle without adjusting the fpr?

maybe i should just get the dang hondata already and not worry about replacing the inline and fmu. i think both units are faulty as well.

 

Hondata doesn't adjust fuel pressure. Fuel pressue is ECU independent.

 

hondat doent adjust fuel pressure, but you can adjust the injector pulses. however when my hondata was tuned w/stock fuel pump/reg, i then added 255 hp, and it still idled fine. it did need some adjustments, but it was fine.


get a hondata, you wont be sorry.

bte- i have seiman deka 83 # injectors for sale, so far high bid is 260.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HXMan &raquo;</TD></TR><TR><TD CLASS="quote">Hondata doesn't adjust fuel pressure. Fuel pressue is ECU independent.</TD></TR></TABLE>

thats what i thought.

i was offered a hondata unit for a great deal when it first started getting popular. i shouldve got it then. it just seems expensive these days. i dont plan on boosting more than 9psi on my stock block. daily driven.

i think ill just order the dang warlbro and go from there.

 

On oem fpr and fuel pump: once you change the pump to warlbro 255, the fuel pressure will raise about 5-10 psi at idle. If you already tuned your car with a set fuel pressure at idle then you need a aftermarket fpr to lower it to that set pressure at idle.


Modified by porsche997 at 11:10 AM 11/12/2003

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by porsche997 &raquo;</TD></TR><TR><TD CLASS="quote">On oem fpr and fuel pump: once you change the pump to warlbro 255, the fuel pressure will raise about 5-10 psi at idle. If you already tuned your car with a set fuel pressure at idle then you need a aftermarket fpr to lower that set pressure at idle. </TD></TR></TABLE>

havent touched it at all since i installed the fmu and inline.