Well I've been discussing this for awhile with some friends trying to figure out my fuel setup for my 500hp (goal) ls/vtec. The fuel system can get so freaking spendy, especially when using aeromotive parts, Pump/Regulator/Fuel filter.. So, being mr. hmt and all I'm thinking why cant a pair of walbros work? ****, I know guys who are doing low 400's on single 255 walbros, 2 should do 500whp right? So I did a bit more research and found some RX7 guys running twin Walbros running 550rwhp. So, basically they just Y the pumps together then run a -8an fuel line to their rails.

Any thoughts would be appricated,

yes at first I was like, god that sounds kinda homo.. but then I thought more about it, and was like ****, it could work?

 

Keep it simple
https://honda-tech.com/zerothread?id=791398

 

holy ****...

stock fuel system on that thing w/ a walbro, damn how can that guy sleep at night!?

 

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

stock fuel system on that thing w/ a walbro, damn how can that guy sleep at night!? </TD></TR></TABLE>

his car seems to have lasted alot longer than alot of the other built high hp honda's on here. sometimes keeping it simple is the best For 500whp i think you'll be fine with the walbro.

 

Mase also tuned another car for 540whp on a walbro 255. I plan on using mine as well for upwards of 500whp... but i do run a -8an feed and -6an return.

 

Bosch mounted intank with -10 supply and -6 return...solid lines will also keep the price down.


If I remember right, Larry and Endyn sells the bosch modified to fit in the stock location for $275 or so...its a little bit more then 2 walbros, but well worth it in my oppinion.


sorry if I got off of your original topic

So if you run the 2 walbros, will you run them both intank? How will they be configured in the tank?

 

one walbro and stock lines will be fine for right around 500hp. we were making well over that with a high pressure 255 walbro and stock lines.

 

if you want 500 horsepower on c116, one 255 walbro will be fine.

 

I've talked to larry about the bosch pump, but ****, its almost expensive as a nice external.

I figured I could do the twin Walbro, since I already have one in my car right now. I could just put them right next to each other (yes both in the tank) and make a fitting so they Y into each other then go -8 or -10 all the way to the rail, and -6 back.

Kinda unsure how an inline twin walbro setup would work? wouldnt the pump in the tank almost act as a restriction more than anything?

 

seems like it'd be the same as running a high volume inline pump while retaining a stock in-tank. I'm not sure why youd do it inline, seems like paralell would work far better.

the thing you have to remember is, you are trying to move volume, not make pressure.

right?

 

He is doing parallel, he said he would Y them together. You're thinking series.

Anyway, if you did do it, I have no way to know but I would think they'd be sending ALOT of fuel back to the tank. Might pay to go with a bigger return line. Too big of a return line hurts nothing, too small is nothing but bad

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AbaZ &raquo;</TD></TR><TR><TD CLASS="quote">Kinda unsure how an inline twin walbro setup would work? wouldnt the pump in the tank almost act as a restriction more than anything?

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

my post was in response to this question.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HatchbackComeback &raquo;</TD></TR><TR><TD CLASS="quote"> Might pay to go with a bigger return line. Too big of a return line hurts nothing, too small is nothing but bad </TD></TR></TABLE>

word

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AbaZ &raquo;</TD></TR><TR><TD CLASS="quote">Well I've been discussing this for awhile with some friends trying to figure out my fuel setup for my 500hp (goal) ls/vtec. The fuel system can get so freaking spendy, especially when using aeromotive parts, Pump/Regulator/Fuel filter.. So, being mr. hmt and all I'm thinking why cant a pair of walbros work? ****, I know guys who are doing low 400's on single 255 walbros, 2 should do 500whp right? So I did a bit more research and found some RX7 guys running twin Walbros running 550rwhp. So, basically they just Y the pumps together then run a -8an fuel line to their rails.

Any thoughts would be appricated,

yes at first I was like, god that sounds kinda homo.. but then I thought more about it, and was like ****, it could work?

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

All u need is a AEM EMS , 860cc injectors , Single Walboro 255gph Intake, SX Fuel Regulator , Filter and Fuel Rail Running Stock lines.. it will support you up to 600 hp .. Keep It Simple

538hp// 481trq With Fuel System Above

 

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

All u need is a AEM EMS , 860cc injectors , Single Walboro 255gph Intake, SX Fuel Regulator , Filter and Fuel Rail Running Stock lines.. it will support you up to 600 hp .. Keep It Simple

538hp// 481trq With Fuel System Above
</TD></TR></TABLE>

DO you mean walbro 255lph? if not what's gph? Also would B&M fuel regulator fine? Im thinking upgrade the filter and keeping the stock fuel rail and lines with a 880cc's injectors. What you think ? good enough for 500

 

GPH is gallons per hour I think, but I know he didn't mean that.

 

Is that a SX Filter on the firewall or what? jesus it looks huge, almost like the pump itself?

hmm, maybe I just keep it on a single walbro 255 and just upgrade the lines

 

I don't know what our problem is but we haven't been able to make over ~350whp with a straight intake (Walbro or BBK 255lph). The RX-7, Supra, and Duc's EJ6 all run Magnaflow Pro Star EFI 600 pumps which cost more than just about everything else but will support over 2000hp and a working range of up to 120psi. Besides running a MSD 125 booster pump inline (probably the most common) I would either go with a Magnaflow or Weldon 4035. Just my $0.02

 

AbaZ
- Sounds like we will have a simillar setup. I too have a LS/VTEC setup that should make that much power aswell. My Fuel system consists of 750cc injectors, Walbro 255 intank pump, SX 1 to 1 boost dependant adjustable fuel pressure reg, AEM fuel rail, aftermarket fuel filter and stock lines in my 91 Teg. I should have this setup completed in a months time. When I get some dyno tunning I will let you know how it goes. If your setup is simillar to mine I will forward you my Zydne program aswell and see how it works out for you.

 

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

All u need is a AEM EMS , 860cc injectors , Single Walboro 255gph Intake, SX Fuel Regulator , Filter and Fuel Rail Running Stock lines.. it will support you up to 600 hp .. Keep It Simple

538hp// 481trq With Fuel System Above
</TD></TR></TABLE>

What manifold is that? But nice #'s for so little... K.I.S.S. for realz!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kataku2K3 &raquo;</TD></TR><TR><TD CLASS="quote">I don't know what our problem is but we haven't been able to make over ~350whp with a straight intake (Walbro or BBK 255lph). Just my $0.02</TD></TR></TABLE>

then you arent doing something right... like i said before we have made well over 500 on stock lines and a walbro 255. if you do the math the walbro 255hp runs out about the same time 880cc injectors at 60psi do. thats about 175hp per cylinder from 880's at 60 psi.

 

I have both Walboro and aeromotive pump on my car harhar...

 

Im running the Bosch on my set up, it flows about 10% more then the walbro. Its a proven fuel pump and even comes factory on some high end sports cars.

 

[QUOTE=98CTRCoupe]

What manifold is that?
QUOTE]

spark racing check there website....

 

Courtney (UglyAssCivic) made 608whp with a Walbro 255 intank pump and stock fuel lines. Runs 10.30s @ 140mph. He used to run really high fuel pressure because he only had 750cc injectors also.

liam

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">then you arent doing something right... like i said before we have made well over 500 on stock lines and a walbro 255. if you do the math the walbro 255hp runs out about the same time 880cc injectors at 60psi do. thats about 175hp per cylinder from 880's at 60 psi.</TD></TR></TABLE>

What would we be doing wrong tho? Whenever we dyno fuel press, vacuum, A:F, and rpm are monitored and like I said even under boost (depending on how much hp) we'll see a drop in fuel press (anywhere from ~1-2psi, sometimes more). Do all you guys making ~500whp+ watch your fuel press on the dyno? Again this drop is the only reason we don't push them over what I mentioned, I just know and have seen a lot of people make good numbers with an intank alone. Even tho they cost more I would still only use a Magnaflow or Weldon for higher boost setups but that's just me.