Fuel Return Line

onerare39

Having read all of tips on this forum to eliminate vapor lock I took to the garage to see what I could do. Thanks to everyone who has taken time to post their efforts pertaining to eliminating vapor lock... I learned a lot.



I had replaced the original fuel sending unit years ago with a late 50s Ford reproduction sending unit (they have the same bolt pattern as Hudson). I fabricated a through the tank fitting using a 3/8 extension for a lamp socket (yep, the same thing you probably have in your living room) and a 90 degree brass fitting and brazed the two together. I drilled a hole through the sending unit mounting plate and cut rubber gaskets out of an old inner tube, added brass washers and nuts. I used a NAPA 3054 fuel filter which has a fuel return line stubbed off already and a .025 restrictor I ordered from McMaster-Carr.



BTW... It Works! I wonder if I'll get Walt's blessing though? I used rubber fuel line for the return.



I had the tank sealed by Tank-Renu years ago, I also run an electric fuel pump, and add 4oz of Marvel Mystery Oil to every 10 gallons of premium fuel... It all helps.



As a side note this procedure will not work on the original sending units as the guts (the mechanicals) are attached to the mounting plate.





John

[Deleted User]

onerare39 wrote:

Having read all of tips on this forum to eliminate vapor lock I took to the garage to see what I could do. Thanks to everyone who has taken time to post their efforts pertaining to eliminating vapor lock... I learned a lot.



I had replaced the original fuel sending unit years ago with a late 50s Ford reproduction sending unit (they have the same bolt pattern as Hudson). I fabricated a through the tank fitting using a 3/8 extension for a lamp socket (yep, the same thing you probably have in your living room) and a 90 degree brass fitting and brazed the two together. I drilled a hole through the sending unit mounting plate and cut rubber gaskets out of an old inner tube, added brass washers and nuts. I used a NAPA 3054 fuel filter which has a fuel return line stubbed off already and a .025 restrictor I ordered from McMaster-Carr.



BTW... It Works! I wonder if I'll get Walt's blessing though? I used rubber fuel line for the return.



I had the tank sealed by Tank-Renu years ago, I also run an electric fuel pump, and add 4oz of Marvel Mystery Oil to every 10 gallons of premium fuel... It all helps.



As a side note this procedure will not work on the original sending units as the guts (the mechanicals) are attached to the mounting plate.





John

Like I tell all, it doesn't matter where the return is as long as you have gas cycling you will not vapor lock. On using rubber lines, be careful that no part hangs lower than the chassis. You only need to ad Marvel oil every third tank full. Make sure you have a filter before the electric fuel pump, that is why owners are having trouble with their pumps. Neat job, Walt.

[Deleted User]

Thanks for showing and explaining your system. A very neat job with good explanations. Thanks, Bob