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Re: fuel return line install [Re: pittsburghracer] #1658314
08/13/14 04:03 PM
08/13/14 04:03 PM
Joined: Oct 2003
Posts: 7,506
Az
Crizila Offline
master
Crizila  Offline
master

Joined: Oct 2003
Posts: 7,506
Az
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.


Fastest 300
Re: fuel return line install [Re: sixpackgut] #1658315
08/13/14 04:04 PM
08/13/14 04:04 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
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

Re: fuel return line install [Re: MR_P_BODY] #1658316
08/13/14 04:14 PM
08/13/14 04:14 PM
Joined: Feb 2003
Posts: 1,942
Metro Detroit
OUTLAWD Offline
top fuel
OUTLAWD  Offline
top fuel

Joined: Feb 2003
Posts: 1,942
Metro Detroit
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.

8239272-A2718661A.jpg (72 downloads)

Faster, Faster until the thrill of speed overcomes the fear of death...

71 Swinger - slowly collecting dust/parts
66 Belv. II - just a streetcar
88 Mustang - turbo LS beater
Re: fuel return line install [Re: sixpackgut] #1658317
08/13/14 04:28 PM
08/13/14 04:28 PM
Joined: Jul 2004
Posts: 19,318
State of confusion
T
Thumperdart Offline
I Live Here
Thumperdart  Offline
I Live Here
T

Joined: Jul 2004
Posts: 19,318
State of confusion
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.............

Last edited by Thumperdart; 08/13/14 04:33 PM.

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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