I tried a search guys but really can't find what I'm looking for. I am putting in a 5.3 with an MPT76 turbo and expect around 500-530whp. I have an ls1 plastic tank that is going in the car with dual walbro 255's but I need a solid way to run a fuel system. I plan on using 1/2 inch aluminum line under the car but I am really confused on the LS1's single feed line. How is fuel pressure regulated, and how does the return line get incorporated?

I'd like to have just one line going to the engine bay as oposed to 2 lines and an aftermarket regulator. I also need to consider the fact that I need to fuel about 600 flywheel horsepower. Any ideas?? I am really stumped on how to set this up.

 

The plastic tank has a built in regulator, so just run your feed to a standard filter, then Tee it back to the return port at the tank sender. The front leg of the Tee goes up to the rail

Your dual pump feeds need to Tee into one line before the return. In-tank, pre/post filter(s) is up to you

 

Not making that much power, but here's what I did. 4th gen tank, stock pump.

I'm not sure what you would do to accommodate the two pumps and 1/2" line (perhaps search on tech).

I'd also assume the return would have to be modified to handle the increased fuel flow capability.

https://www.thirdgen.org/forums/ltx-...-ls1-tank.html

 

Heres how i ran mine. I used the stock lines up untill after the T, then did this

 

I did like Sheldon did also, but I used the stock 3rd gen tank and ran about 2 feet of SS braided line to and from my AFPR.

 

Thank you MUCH guys! Thats a lot easier than I thought, lol.

Now that I have an idea of what to do for my line set up, heres a few more questions regarding your set ups...

First, pocket, do you think the factory in tank regulator and return line size will handle the dual walbros with a 1/2 inch feed line?

Also, SheldoZ28, I REALLY want to use those aluminum fuel line to AN adapter fittings like you've got in your engine bay but on summit it says they are great for "low pressure" fluid transfer! I have seen a bunch of people using them for fuel line though. Have you ever heard of a problem using them with fuel injection set ups? Because they look great!

Again, thanks a bunch guys.

 

Several guys on tech have no problems with the stock regulator. Go with an engine bay mounted AFPR if its suspect

I wouldnt use the compression hose ends, esp in front of two high pressure pumps. Ive never heard anyone give a horror story of line separation, but Id hate for you to invite trouble. The proper way to mate hardline to hose is with a tube sleeve/nut on a flared hardline. Those will be cheaper than the compression end, but require a special tool to install properly

 

You don't by any chance have a link to the tube sleeve/ nut do you, just so I have an idea of what to look for? I've really never worked with fuel or brake line before so I'm not sure what it is.

 

Nut
http://www.summitracing.com/parts/EAR-981808ERL/

Sleeve
http://www.summitracing.com/parts/EAR-981908ERL/

Nut goes on the line first, then the sleeve, then flare the end of the line. 37* IIRC. Use a male/male union fitting and you're able to attach any common female hose end. Male hose end fittings are generally more expensive than the union and standard ends combined. Draw a diagram for your fuel system and work out what fittings youll need where and how many are required. They are small and can be easily loverlooked if not though out carefully

Be careful, alum tubing loves to split

 

Well I guess thats my plan then! I did a little searching here on the board and it seems the factory plastic return line on the 4th gen pump is 3/8 so I'm going to get an adapter for that to a -6 return and I'll be using those nuts and sleeves for the setup on the 1/2 inch line. Thanks a bunch!