Information and advice for fuel system

[USAF 98 GSX]

Background info: 98 GSX, all maintenance completed, minor mods (Intake, exhaust, DSM Link v3 and FMIC), everything else on car is stock.

Future goals: 500-600hp, E85.

Road to goal: I started my journey by completing the most important thing when buying a used car. ALL Maintenance costs and repairs. Car came with FMIC installed when I bought it, I installed intake, test-pipe (removed cat) and the bought DSM Link v3. I recently bought a beautiful rebuilt 14b and Ive decided its time to start my journey with supporting mods. I would like to first start with my fuel system. I would like to have an in-tank 255, in-line 255, full nylon braid fuel line to filter, new filter assy, braided line to rail, upgraded fuel rail, braided line to FPR, upgraded FPR, and a fully braided return line to tank. (I'm honestly not even sure if thats the correct route of fuel lines and components)
I will also be installing 1600cc injectors with all of these parts.

Questions:

With my high HP goal, can I use 8 AN lines all around? Even the return line? (Or is the return line always supposed to be smaller?)

Should I use two 255lph pumps or one 455lph pump?

Believe it or not the fuel system on a DSM is one of the few systems I know very little about. To be honest, I am actually unsure the route of fuel lines and fuel components. I have drawn a simple diagram using Paint which shows what I think is the correct way the fuel flows through our vehicles. Go ahead a laugh. Lol.

Any advice, tips, corrections and comments would be greatly appreciated. I tried to include everything you might need to know to help me out. Thank you in advance!

 

[WES_393]

First, I hope your aware that you won't make 500-600hp on a 14b. Just had to put that out there. As for your questions:

-8an fuel lines would be plenty for 500-600hp. Yes, you would also want to use the same size line for the return.

For fuel pumps, I'd go twin Walbro 255lph HP in-tank. You'll need an aftermarket pump hanger (or heavily modded stock) anyways, might as well go with a Full-Blown dual hanger.

Your diagram is mostly correct, the return actually crosses back behind the engine and runs back/front like the feed line and tank vent. You'll figure it out once your under there.

Overall your plan looks good. Like I said, you will have way more than enough fuel. I would personally skip the aftermarket fuel rail and have fittings welded to the stock rail. I'd also look into the 1600cc injectors and what it takes to run them successfully. Also, any thoughts on what brand/model AFPR? You may need more than your average Aeromotive or Fuelab regulator.

 

[USAF 98 GSX]

First, I hope your aware that you won't make 500-600hp on a 14b.

Lol I definitely knew that wasn't happening. I can see how it seems like that was my plan. Basically since I was now upgrading my turbo a little bit I decided it was time to fully upgrade my fuel system. To reach the 500-600 I will be going HX-40 or PTE 6262. Not sure yet.

Also, any thoughts on what brand/model AFPR? You may need more than your average Aeromotive or Fuelab regulator.

Here is my parts list:

2 - Walbro 255
1 - Fuelab 858 Series High Flow Integrated Filter/Check Valve
1 - AEM High Volume Fuel Rail
1 - Fuelab 525 Series Fuel Pressure Regulator
4 - FIC BlueMAX 1650cc Peak and Hold/Low Impedance Ball & Seat Injectors
??ft - Russell Nylon Braided Line

 

[finesse49ers]

I had a BB 6262 making the power you want on pump. I have a Walbro 400, used FIC 1650cc's and Bosch 1680cc's on a stock fuel setup excluding a FueLab FPR. I've since upgraded the rest of my fuel setup using 8AN lines on both the feed and return on the stock fuel pump assembly.

So pretty much you're fine with what you have. I would upgrade to a Walbro 450lph pump (made to use with E85) instead of dual 255's but YOU don't HAVE to. I would also upgrade my fuel filter.

 

[Total Eclipse]

If you get the AEM high volume fuel rail, make sure to specify it to be -6 or -8 (whatever you plan to use). I didn't do that, and they sent the one with the stock fuel line connections. No big deal, I just had -6 welded on for my suply/return lines the same time I hade some welded to my hanger. Just a heads up! Sounds good, and with that setup you should have NO fuel feeding problems. +1 on the filter too. Might as well do it all! Good luck and have fun.

Nate

 

[USAF 98 GSX]

Thanks. Extreme PSI doesn't let me specify the inlet and outlet sizes. Maybe I'll just call and ask.

 

[Total Eclipse]

Yea, I find that it's always better to call in an order rather than ordering online. If you call it in, it gets prccessed right then and thee, and can ship earlier, and you can also make sure all the specifics of the order are straight before it ships. Plus, some places I have actually recieved a discount for calling in rather than ordering online!

 

[phunny]

8 an line is fine. I would get a 450 in tank and something in line(cheaper, easier and better IMHO). Ditch the 1650's and some something bigger, ID 2200s or FIC2150's or you will run out of injector.

 

[USAF 98 GSX]

8 an line is fine. I would get a 450 in tank and something in line(cheaper, easier and better IMHO). Ditch the 1650's and some something bigger, ID 2200s or FIC2150's or you will run out of injector.

Might as well 2200 it is.

 

[Total Eclipse]

Better to have it and not need it, than to need it and not have it!

 

[USAF 98 GSX]

Yup, boost and HP is addicting, I say 600 HP now but it'll most likely change once I get tired of it. Lol

 

[boost97gst]

Members on here have went over 600hp on stock fuel lines,filter,rail. Just fyi. But i think your setup looks great

I think Clipto is over 600 on stock lines and maybe even the stock fpr! He may have went with an afpr or changed his setup

 

[USAF 98 GSX]

Durability, reliability and piece of mind. That's a few other reasons to upgrade. But I did not know It was possible to hit that with stock everything

 

[Calan]

Durability, reliability and piece of mind...

Sounds like a job for one of the new Walbro 450 pumps. I currently run dual 255's, but only because of the cost for me at the time.

If I was starting from scratch, I would probably go with just one of the ethanol-safe 450's. One less pump to worry about, along with the simplicity.

 

[USAF 98 GSX]

Sounds like a job for one of the new Walbro 450 pumps. I currently run dual 255's, but only because of the cost for me at the time.

A Walbro 450 is what I'll be using because for some crazy reason I could always add an inline pump. But until then one 450 in-tank will do.

What is the max fuel flow rating or HP rating for 8 AN lines? 10 AN lines? I'm set on a 450 pump, inline 255 (maybe one day), 2200cc injectors, top of the line filter, rail and regulator. The fuel lines are basically the last parts I'm still unsure about. 8 AN or 10 AN?

 

[finesse49ers]

A Walbro 450 is what I'll be using because for some crazy reason I could always add an inline pump. But until then one 450 in-tank will do.

What is the max fuel flow rating or HP rating for 8 AN lines? 10 AN lines? I'm set on a 450 pump, inline 255 (maybe one day), 2200cc injectors, top of the line filter, rail and regulator. The fuel lines are basically the last parts I'm still unsure about. 8 AN or 10 AN?

8AN is enough, some would say more than enough.

 

[Calan]

8 AN or 10 AN?

8AN is enough, some would say more than enough.

This ^.

I've been up around 500hp on stock lines and a single 300lph Deatschwerks pump, and am now running dual in-tank 255 pumps on a -6AN supply and stock return....and this was on E85. I have no idea how much power this has made, but it was enough to trap 124 in the quarter in a 3400 lb car, with a horrible 2+ sec 60 and spinning through 3rd gear.

-8AN is PLENTY large enough.

 

[USAF 98 GSX]

Thank you, 8 AN it is. Now time to wait for tax return . But there will be no hesitation once money is in hand. Thank you everyone for clearing up my confusion and uncertainty.

 

[USAF 98 GSX]

Oh yeah Calan, I see a catch can in my future. I'll let you know. Depending on final price of fuel system

 

[phunny]

Not a chance I believe a single 450 cant net you 600hp on E85.

 

[USAF 98 GSX]

Not a chance I believe a single 450 cant net you 600hp on E85.

Well a 450 will be in tank regardless and an additional 255 might be added if necessary. Knowing me lll int the 255 anyways because I'm a bit anal and like overkill.

 

[phunny]

I'm at 600awhp at over 80% IDC on a 450 and 255 inline

 

[USAF 98 GSX]

So if you could redo your fuel system regarding pumps what would you do?

 

[USAF 98 GSX]

Also that's running 2200cc injectors?

 

[phunny]

Also that's running 2200cc injectors?

Yes. I would spend the money and get a mechanical fuel pump and be done with it.