injector return line with fass system

evil12vcummins

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Apr 27, 2009
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so i put my fass 95/180 @55psi on my 12v. runs awsome solved all my problems of fuel volume. but how do i get rid of my stock fuel filter. i need a return for the fuel manifold off the injectors. what do i "T" into. pics would be freakin awsome.
 
you tee it into the return line

go get a hex or octagonal shaped pc of material, drill and tap ea end for a barb fitting, drill n tap one side of the hex (for the inj return banjo) and its done

but i would call whoever sold ya the fass and ask them to supply it

the kit musta been for some other app if it didnt come with the tee
 
My fass didn't come with anything to T into the stock return. I cut the factory injector return line & the pump return line and made my own T with some brass fittings from a Ace hardware store. I slipped rubber hose over each end and some clamps and its worked great since I installed it two years ago.
 
there ya go

or you can do like i did if you want to get fancy and braze a AN fitting on the inj return line

we took a -4 plug and drilled it out til it just fit over the cut off end of the inj line

air dog kits comes with a tee
 
My fass didn't come with anything to T into the stock return. I cut the factory injector return line & the pump return line and made my own T with some brass fittings from a Ace hardware store. I slipped rubber hose over each end and some clamps and its worked great since I installed it two years ago.

That's what I did. No problems so far.

DSC00896.jpg
 
A 3/16" compression fitting works perfect for the injector return line.
Less than a $2.00 at true value.
Mine has been on my AirDog for almost 2 years with no problems.

As far as the stock fuel filter goes,
I ran my supply line to the injection pump, I did away with the lift pump and pre-heater. A chevy fuel blockoff plate works perfect.

The return out of the overflow, I cut off and left 2" of steel line and used a 5/16" x 3/8"npt compression fitting,to a 3/8" coupling then a 3/8" x 5/16" hose barb to a piece of 5/16" hose.

I then ran a small piece of 5/16" hose to where the injector return line is and used a 3/8" threaded tee with 2-3/8npt x 5/16 hose barbs on the run of the tee, out of the bull of the tee, I used a 3/8 npt x 5/16" hose barb with a small piece of 5/16" hose.
That connects to 1/4"npt x 5/16" hose barb to a 1/4" coupling then to a 1/4"npt x 3/16" compression fitting connected to the factory steel injector return line. Out of the run of the tee, it goes back to the fuel tank, where I used a bulkhead fitting to tie the return line into. All the compression fitting and the 3/8" npt tee are brass.

I did away with the sending unit connections. My fuel line comes out the bottom of the tank and my AirDog return is on the top of the tank and so is my overflow return line. I hav 2 seperate returns on the top of the tank.

I posted some blurry pics.

Been like this for about 2 years with no leaks or no air leaks.
 

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Don has pictures on here of his entire setup. It's really prettyslick how he did the lines on his.
 
thank you

got a sponsor outta my bike deal

it took me a while to convince him that the tow rig needed that many of his AN fittings but i pulled it off

if i had to pay for it all i prolly woulda just brazed a barb on the end of it and bought a brass barb tee to tie it in

*found it for ya:

itlives003.jpg

fuelsystem030.jpg
 
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