Setting up dual pump lines
 

I need some help on running fuel lines for the in tank dual pump set up.

I want to join both fuel pump lines into the stock fuel line, to make things easy.

Will the stock fuel lines handle two pumps pushing through them to the fuel rails?

We did this...you have to find a Metal Y

Put a section of fuel hose on each pump run it to the Y and then run one more section of hose from the Y to the top of the fuel pump assembly and out and you're done.

What size hoses are you guys using?
Are you running rubber hose or special hose?

Thanks,
Mike.

How come you dont run a return line? :)

email me at bigdog8643@aol.com.

I have a custom fuel setup with dual in tank pumps I can share with you.

RON

stainless steel braided hose
it can hold like 2000 psi

if not you want to use FUEL INJECTION hose not just normal fuel line cause it cant take the 40-60psi you see at high boost

I dont like the 'y' in the fuel tank.

The pumps can outwork eachother and your total volume of fuel pumped will drop.

You can run the pumps to the stock feed and return for feed lines, and use the stock emissions line for a return.

-bobby

/\ i disagree. granted a pump may fail and the car will start. this would be a problem because it would lean out under boost. but it would also stutter and you should lift. how would you know the single pump in you car had a restriction or started to lose volume? a sttuter. 2 similar healthy pumps should flow about the same, anyway any drop in the one, if it was theoreticaly blocking the other by out flowing it, would allow the other pump to contribute to the fuel rail and pick up the volume difference.

I would know if one of my two pumps failed as soon as I started the car...it would be way more quiet!:biggrin:

You can call me at 707-696-2705 weekends, and I will walk you through it, I'm doing mine with a surge tank/fuel cell/Bosch in tank/A1000 external/etc, right now. In terms of lines, I recomend Aeroquip socketless. Look it up on Summits site, easy to use, AN fittings, and pushes ogether. I just got 20ft of -6, 20ft of -8, and a buch of fittings, cost less than 150.00 for everything. As far as dual pumps go, if you buy new Walbros, they last a long time, and just replace them every cpouple years. for ~100.00 new you cannot beat them, and one will provide enough fuel for 400whp, so if one does fail, you will be OK under most circumstances. Regards, Carl

Ok cool.

Well I'm going to run a fuel pressure gauge also
But thanks for the input, If I run into trouble I'll give you a call.

Thanks,
-MIke.

If you were gunna run 2 intank and want to use the same line, my first advice would be to atleast by a bigger diameter line. you can buy a "y" like someone mentioned but instead of all of them being the same size, make the lines coming from the pump a bit smaller or use the stock size line for the pump outlets, and just upgrade the line going to the F rail. And if you are gunna run an FPR then might ass well run the an lines...

I am running two supra pumps in my FD. Use the stock lines and the return use the charcoal cansister line. Make sure you wire each pump with at least 8 gauge wire. I am running 4 gauge to a fuse block then 8 to each pump. I have enough fuel for over 1000hp.

Nice ride, o and I believe the tires on the blue fd are mounted backwards.

Run each line to it's own fuel rail and then to a single fpr.

what if one of the pumps fail?

You can always get two pressure sensor switches from say Autometer ($10-$15 each) and install them in each line anywhere before the fpr that can signal a warning light from AutoMeter or others if the psi drops below whatever psi you designate.

If you need two pumps, you've spent a good amount of money on other things that necessitate the increase in fuel. A simple system like this, including an aftermarket afpr with -an fittings/lines to accomodate pressure switches could be easily had for less than $250 and is probably a drop in the bucket compared to other power upgrades you've added.
You can even get -an to hose barb fittings to retain your rubber lines or just install a brass barbed fitting tapped for 1/8 npt cut into your existing lines to accomodate the pressure switches. Combined with a simple light from Radio Shack your out less than $30.

With possibly the exception of two stock pumps run together, I wouldn't run two pumps without a warning system like this. Depending on your reaction time to lift off the throttle in a starvation situation due to a pump failure, no matter how it is plumbed is asking for trouble imho.

I don't recall what type of pumps you are running, but two stock pumps run to each rail can support more hp than most peoples engines will ever produce, be completely reliable and be had for a good price.

very good idea, then your Fuel pressure is EXACTLY the same for both rails and you save yourself buying two FPRs.