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fuel return line install

Posted By: dodgeram1998

fuel return line install - 08/13/14 12:40 AM

I see most fuel cell installs are installed with the return on top of the cell .
Manufacturers install recommendation or rule book compliance.
Posted By: Jamie McGrath

Re: fuel return line install - 08/13/14 12:58 AM

I think its done too keep the fuel cooler and make more powder.......
Posted By: Adobedude

Re: fuel return line install - 08/13/14 12:59 AM

Necessity.

You want the fuel to pour into the fuel cell without adding pressure to the return line.
Posted By: Bigcube

Re: fuel return line install - 08/13/14 01:28 AM

I have a piece of tubing inside the cell so the return is below the surface of the fuel. Keeps it from causing bubbles that could be pulled into the fuel pump.
Posted By: Thumperdart

Re: fuel return line install - 08/13/14 01:30 AM

Quote:

Necessity.

You want the fuel to pour into the fuel cell without adding pressure to the return line.





This............I didn`t but will ad an extension tube to the cell and run it down into the foam to help stop aeration and foaming.
Posted By: Bigcube

Re: fuel return line install - 08/13/14 01:34 AM

Quote:

Quote:

Necessity.

You want the fuel to pour into the fuel cell without adding pressure to the return line.





This............I didn`t but will ad an extension tube to the cell and run it down into the foam to help stop aeration and foaming.



I ditched the foam years ago. I have a tube on the returns. I two returns, have one from the pump and one from the regulators.
Posted By: Thumperdart

Re: fuel return line install - 08/13/14 02:00 AM

I use foam w/good results so far.............Then it`s tubes to the bottom of the cell.
Posted By: Bigcube

Re: fuel return line install - 08/13/14 02:03 AM

Notch or cut a hole in the foam for the tube, then run the tube about 2-3" from the bottom. Unless you are on E it will be fine
Posted By: Adobedude

Re: fuel return line install - 08/13/14 02:20 AM

I'd be curious to see how that works, maybe it's time for a Mr. Wizard test.

A hose, a glass of water and cell phone...Oops sorry.
Posted By: Crizila

Re: fuel return line install - 08/13/14 05:53 AM

If you are running foam in the tank, you don't need to run a tube in to it ( or below the fuel level in the tank ) to eliminate fuel airation. More important is NO back pressure. Try not to run a 90* fitting in to the tank. The fuel traveling through the foam ( plus the prefilter )will insure a solid stream to the pump.
Posted By: Adobedude

Re: fuel return line install - 08/13/14 01:36 PM

I have foam in my cell and the only sharp 90 I have is the line that goes to my fuel pressure gauge.
Posted By: pittsburghracer

Re: fuel return line install - 08/13/14 02:11 PM

I threaded a fitting and did this on my Duster.

Attached picture 8238801-oilpansandconv001.JPG
Posted By: pittsburghracer

Re: fuel return line install - 08/13/14 02:12 PM

2.

Attached picture 8238802-oilpansandconv002.JPG
Posted By: Adobedude

Re: fuel return line install - 08/13/14 04:49 PM

Won't submerging the return line into the gas already in the tank increase the return line pressure?

I know it makes a big difference on my water tanks at the job site, I have to keep the hose out of the water in the tank I'm filling or the flow really slows down.
Posted By: MR_P_BODY

Re: fuel return line install - 08/13/14 05:19 PM

Quote:

Won't submerging the return line into the gas already in the tank increase the return line pressure?

I know it makes a big difference on my water tanks at the job site, I have to keep the hose out of the water in the tank I'm filling or the flow really slows down.




Your talking inches of water back pressure(about 30"
of water to 1 psi)... with the return down in the fuel
it reduces aireation a ton... but if the return is
far enough away or if it has foam there isnt any
problem
Posted By: Thumperdart

Re: fuel return line install - 08/13/14 05:49 PM

Quote:

Won't submerging the return line into the gas already in the tank increase the return line pressure?

I know it makes a big difference on my water tanks at the job site, I have to keep the hose out of the water in the tank I'm filling or the flow really slows down.




Wondered the same thing but my pump is pre-set at 27 lbs. iirc and others I know use a tube w/out any issues. I don`t normally run a full cell(12 gallons)cos of the added weight although it helped before my suspension mods came around and now that it hooks pretty good I figured w/less fuel in the cell the tube would help...........or not.
Posted By: pittsburghracer

Re: fuel return line install - 08/13/14 07:47 PM

I removed my foam years ago because of the alcohol in pump gas with zero issues. These are the instruction that came with my BG400 pump.



Bypass
The return line should be fed with a single #8 or
1/2" line. Plumbing kit number 150187 is avail-
able for this application. The return should expel
the bypassed fuel into the liquid rather than into
the air space of the fuel cell. This will prevent
aeration of the fuel. All fuel tanks and cells
should have fuel cell foam installed to prevent
fuel slosh.
WARNING: DO NOT BLOCK THE RE-
TURN, VENT, OR PUMP FEED. MAKE
SURE THAT THE SYSTEM IS LEAK FREE
AT ALL CONNECTIONS...YOUR SAFETY
DEPENDS ON IT!
Wiring
BEFORE MAKING ELECTRICAL CON-
NECTIONS, DISCONNECT THE POSITIVE
TERMINAL FROM THE BATTERY.
Your BG400 Fuel system should be connected to
a fully charged 12 or 16 volt battery. A fuel
pump, like any other electrical accessory, will
only perform at its best when given adequate
voltage. The black wire is a ground (-) and the
remaining wire is a switched hot lead from a 12 or
16 volt source. If wired incorrectly, the pump wi
Posted By: Crizila

Re: fuel return line install - 08/13/14 08:34 PM

Quote:

I removed my foam years ago because of the alcohol in pump gas with zero issues. These are the instruction that came with my BG400 pump.



Bypass
The return line should be fed with a single #8 or
1/2" line. Plumbing kit number 150187 is avail-
able for this application. The return should expel
the bypassed fuel into the liquid rather than into
the air space of the fuel cell. This will prevent
aeration of the fuel. All fuel tanks and cells
should have fuel cell foam installed to prevent
fuel slosh.
WARNING: DO NOT BLOCK THE RE-
TURN, VENT, OR PUMP FEED. MAKE
SURE THAT THE SYSTEM IS LEAK FREE
AT ALL CONNECTIONS...YOUR SAFETY
DEPENDS ON IT!
Wiring
BEFORE MAKING ELECTRICAL CON-
NECTIONS, DISCONNECT THE POSITIVE
TERMINAL FROM THE BATTERY.
Your BG400 Fuel system should be connected to
a fully charged 12 or 16 volt battery. A fuel
pump, like any other electrical accessory, will
only perform at its best when given adequate
voltage. The black wire is a ground (-) and the
remaining wire is a switched hot lead from a 12 or
16 volt source. If wired incorrectly, the pump wi


Interesting? They don't tell you how long this line in to the fuel should be. Why not just plumb the return line in to the bottom of the tank if you are that concerned about fuel aeration?? That would cover all scenario's. JMO, but I aint buyin it.
Posted By: pittsburghracer

Re: fuel return line install - 08/13/14 08:44 PM

Quote:

Quote:

I removed my foam years ago because of the alcohol in pump gas with zero issues. These are the instruction that came with my BG400 pump.



Bypass
The return line should be fed with a single #8 or
1/2" line. Plumbing kit number 150187 is avail-
able for this application. The return should expel
the bypassed fuel into the liquid rather than into
the air space of the fuel cell. This will prevent
aeration of the fuel. All fuel tanks and cells
should have fuel cell foam installed to prevent
fuel slosh.
WARNING: DO NOT BLOCK THE RE-
TURN, VENT, OR PUMP FEED. MAKE
SURE THAT THE SYSTEM IS LEAK FREE
AT ALL CONNECTIONS...YOUR SAFETY
DEPENDS ON IT!
Wiring
BEFORE MAKING ELECTRICAL CON-
NECTIONS, DISCONNECT THE POSITIVE
TERMINAL FROM THE BATTERY.
Your BG400 Fuel system should be connected to
a fully charged 12 or 16 volt battery. A fuel
pump, like any other electrical accessory, will
only perform at its best when given adequate
voltage. The black wire is a ground (-) and the
remaining wire is a switched hot lead from a 12 or
16 volt source. If wired incorrectly, the pump wi


Interesting? They don't tell you how long this line in to the fuel should be. Why not just plumb the return line in to the bottom of the tank if you are that concerned about fuel aeration?? That would cover all scenario's. JMO, but I aint buyin it.





I think the reason they want it up high is to prevent any chance of suction. Kinda like priming a pump.
Posted By: sixpackgut

Re: fuel return line install - 08/13/14 08:45 PM

Quote:

I removed my foam years ago because of the alcohol in pump gas with zero issues. These are the instruction that came with my BG400 pump.



Bypass
The return line should be fed with a single #8 or
1/2" line. Plumbing kit number 150187 is avail-
able for this application. The return should expel
the bypassed fuel into the liquid rather than into
the air space of the fuel cell. This will prevent
aeration of the fuel. All fuel tanks and cells
should have fuel cell foam installed to prevent
fuel slosh.
WARNING: DO NOT BLOCK THE RE-
TURN, VENT, OR PUMP FEED. MAKE
SURE THAT THE SYSTEM IS LEAK FREE
AT ALL CONNECTIONS...YOUR SAFETY
DEPENDS ON IT!
Wiring
BEFORE MAKING ELECTRICAL CON-
NECTIONS, DISCONNECT THE POSITIVE
TERMINAL FROM THE BATTERY.
Your BG400 Fuel system should be connected to
a fully charged 12 or 16 volt battery. A fuel
pump, like any other electrical accessory, will
only perform at its best when given adequate
voltage. The black wire is a ground (-) and the
remaining wire is a switched hot lead from a 12 or
16 volt source. If wired incorrectly, the pump wi




I know sometimes I'm a bit out in left field, but I have thought about this before. like in a fish tank where water flows out of the filter and dumps into the water, its adding oxygen to the water, is it possible that when fuel is dumping into a fuel cell, is it adding oxygen to the fuel similar to some race fuels that are oxygenated
Posted By: Crizila

Re: fuel return line install - 08/13/14 09:03 PM

Quote:

Quote:

Quote:

I removed my foam years ago because of the alcohol in pump gas with zero issues. These are the instruction that came with my BG400 pump.



Bypass
The return line should be fed with a single #8 or
1/2" line. Plumbing kit number 150187 is avail-
able for this application. The return should expel
the bypassed fuel into the liquid rather than into
the air space of the fuel cell. This will prevent
aeration of the fuel. All fuel tanks and cells
should have fuel cell foam installed to prevent
fuel slosh.
WARNING: DO NOT BLOCK THE RE-
TURN, VENT, OR PUMP FEED. MAKE
SURE THAT THE SYSTEM IS LEAK FREE
AT ALL CONNECTIONS...YOUR SAFETY
DEPENDS ON IT!
Wiring
BEFORE MAKING ELECTRICAL CON-
NECTIONS, DISCONNECT THE POSITIVE
TERMINAL FROM THE BATTERY.
Your BG400 Fuel system should be connected to
a fully charged 12 or 16 volt battery. A fuel
pump, like any other electrical accessory, will
only perform at its best when given adequate
voltage. The black wire is a ground (-) and the
remaining wire is a switched hot lead from a 12 or
16 volt source. If wired incorrectly, the pump wi


Interesting? They don't tell you how long this line in to the fuel should be. Why not just plumb the return line in to the bottom of the tank if you are that concerned about fuel aeration?? That would cover all scenario's. JMO, but I aint buyin it.





I think the reason they want it up high is to prevent any chance of suction. Kinda like priming a pump.


"Any chance" means it can't be submerged in the fuel - I would think? Still doesn't answer how long the tube should be. My return line at idle dumps like a garden hose. The fuel still has to go through the foam, lines, and pre-filter before it goes in to the pump. If it still has air in it, God bless it! A bigger concern to me would be return ine back pressure / tank vent size.
Posted By: MR_P_BODY

Re: fuel return line install - 08/13/14 09:04 PM

Quote:

Quote:

I removed my foam years ago because of the alcohol in pump gas with zero issues. These are the instruction that came with my BG400 pump.



Bypass
The return line should be fed with a single #8 or
1/2" line. Plumbing kit number 150187 is avail-
able for this application. The return should expel
the bypassed fuel into the liquid rather than into
the air space of the fuel cell. This will prevent
aeration of the fuel. All fuel tanks and cells
should have fuel cell foam installed to prevent
fuel slosh.
WARNING: DO NOT BLOCK THE RE-
TURN, VENT, OR PUMP FEED. MAKE
SURE THAT THE SYSTEM IS LEAK FREE
AT ALL CONNECTIONS...YOUR SAFETY
DEPENDS ON IT!
Wiring
BEFORE MAKING ELECTRICAL CON-
NECTIONS, DISCONNECT THE POSITIVE
TERMINAL FROM THE BATTERY.
Your BG400 Fuel system should be connected to
a fully charged 12 or 16 volt battery. A fuel
pump, like any other electrical accessory, will
only perform at its best when given adequate
voltage. The black wire is a ground (-) and the
remaining wire is a switched hot lead from a 12 or
16 volt source. If wired incorrectly, the pump wi




I know sometimes I'm a bit out in left field, but I have thought about this before. like in a fish tank where water flows out of the filter and dumps into the water, its adding oxygen to the water, is it possible that when fuel is dumping into a fuel cell, is it adding oxygen to the fuel similar to some race fuels that are oxygenated




If it is , its so minute you wouldnt ever see any affect..
I did a study on this at Chrysler and I found that
if it enters below its a lot less issue with air..
thats the reason we STILL return it well below the
fuel level... now we use the return to accumulate
more fuel in our reservoir that surrounds the pump...
injected engines HATE air(as in bubbles)... a ton
of air is induced at the carb when the fuel goes past
the N/S into the bowls
Posted By: OUTLAWD

Re: fuel return line install - 08/13/14 09:14 PM

FWIW Aeromotive's Fuel cell w/ the in-tank A1000 pump...returned below fuel level. I will be borrowing this idea with the cell I am building this winter for the car.

Attached picture 8239272-A2718661A.jpg
Posted By: Thumperdart

Re: fuel return line install - 08/13/14 09:28 PM

Quote:

Quote:

I removed my foam years ago because of the alcohol in pump gas with zero issues. These are the instruction that came with my BG400 pump.



Bypass
The return line should be fed with a single #8 or
1/2" line. Plumbing kit number 150187 is avail-
able for this application. The return should expel
the bypassed fuel into the liquid rather than into
the air space of the fuel cell. This will prevent
aeration of the fuel. All fuel tanks and cells
should have fuel cell foam installed to prevent
fuel slosh.
WARNING: DO NOT BLOCK THE RE-
TURN, VENT, OR PUMP FEED. MAKE
SURE THAT THE SYSTEM IS LEAK FREE
AT ALL CONNECTIONS...YOUR SAFETY
DEPENDS ON IT!
Wiring
BEFORE MAKING ELECTRICAL CON-
NECTIONS, DISCONNECT THE POSITIVE
TERMINAL FROM THE BATTERY.
Your BG400 Fuel system should be connected to
a fully charged 12 or 16 volt battery. A fuel
pump, like any other electrical accessory, will
only perform at its best when given adequate
voltage. The black wire is a ground (-) and the
remaining wire is a switched hot lead from a 12 or
16 volt source. If wired incorrectly, the pump wi




I know sometimes I'm a bit out in left field, but I have thought about this before. like in a fish tank where water flows out of the filter and dumps into the water, its adding oxygen to the water, is it possible that when fuel is dumping into a fuel cell, is it adding oxygen to the fuel similar to some race fuels that are oxygenated




Whatcha smokin there 6.................. But it actually makes sense for some crazy reason.

Except for the fact that the pump doesn`t wanna suck bubbles but solid fuel.............
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