hillbilly dual tank

[Frankenchevy]

truck currently has two 20 gallon tanks, valve looks crusty. converting to efi, '87 tank/sender, ep381 pump

i purchased a spectre replacement tank for an 87 and the above said parts. this only takes care of one side. since i already have a 9 or 10 psi electric frame mount fuel pump laying around...is it a horrible idea to also buy a mechanical style 20 gallon tank; and just transfer from it, into to the high pressure tank when the high pressure tank is running low?

thinking of places to refill into…maybe 'Y' into the efi systems return line and install a directional valve in the efi return line between the 'Y' and efi? do fuel rated directional valves exist? not sure if the back pressure would affect efi. maybe t into the filler neck?

any thoughts on this ridiculous idea? it'd be nice to do away with the fuel selector and replace the on-on toggle with an on-off toggle for the 12v transfer pump. i'm not even sure how the selector would work with 60psi coming through it. it'd also be nice to simplify the relay setup for the ep381, as well as the main fuel supply/return to the efi.

by the way, i'd just flick the 12v pump on when stopped and watch the gauge then turn it off when it reads almost full.

 

[Honky Kong jr]

Being your starting pretty much from scratch, you should of went Burb or Blazer tank. Just saying.

 

[Frankenchevy]

Being your starting pretty much from scratch, you should of went Burb or Blazer tank. Just saying.

I kinda looked into that. It seemed like a lot of work to retain the stock filler location.

Where do people normally put the tank? In the spare tire well area or over the rear driveline?

 

[Honky Kong jr]

I kinda looked into that. It seemed like a lot of work to retain the stock filler location.

Where do people normally put the tank? In the spare tire well area or over the rear driveline?

I put mine where the spare would go.... pretty much stock location for a Burb or Blazer. I just put a gas door in the back.

 

[Frankenchevy]

I might do that down the road when I pull the body off and re-plumb/wire. I just don’t want to end up with my spare tire in my bed, so I’d have to figure something out.

Theoretically speaking, if you had to transfer fuel from one tank to another, where would you tap in to the tank that is to be filled? I’d like to tap in to the primary tanks return line from the EFI but I need to find out if that would cause an issue with back pressure.

So for now the three options I have thought of would be teeing into the filler neck, teeing into the vent or tapping a fitting into the primary tank...

 

[bucket]

If you tap into the return line, it's likely that your returning fuel will fill up your secondary tank.

 

[Honky Kong jr]

If you tap into the return line, it's likely that your returning fuel will fill up your secondary tank.

If it’s runnig wouldn’t that dead head the returning fuel?

 

[yevgenievich]

Tie in to the filler line or add a fitting to the top of the tank that is to be filled. It will take for ever to fill up using 5/16 return line

 

[Honky Kong jr]

Tie in to the filler line or add a fitting to the top of the tank that is to be filled. It will take for ever to fill up using 5/16 return line

Good call his tank is new, safer to weld or braze.

 

[Frankenchevy]

i hope welding the spectre tank's coating is similar to standard galvy. even then i'll need a few practice passes. haven't mig welded that thin of galvy in a long while…i have a torch but have never brazed galvy either. any tips? i'll be using my new hobart. it can run 220 or 110…co2/argon mix. i also have a lincoln pro mig 180 i haven't fired up in ages.

i'm anal and can't stand splatters and boogers so i'll definitely practice before hand. if anyone welds this kind of material often and has any gas or flux core suggestions…i'm all ears

 

[Honky Kong jr]

You may be able to put the fitting in the sender itself. But gas for sure and remove the galvanizing before welding. And drink your milk.

 

[Frankenchevy]

You may be able to put the fitting in the sender itself. But gas for sure and remove the galvanizing before welding. And drink your milk.

dude…weird, i am actually drinking a gallon of milk right now.

why do you say that though?

 

[Honky Kong jr]

dude…weird, i am actually drinking a gallon of milk right now.

why do you say that though?

When you weld galvanized metal milk helps counter the side effects.

 

[Frankenchevy]

When you weld galvanized metal milk helps counter the side effects.

ohhhh.. never knew that

 

[Dougnsalem]

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Just an idea. Pop the sending unit out and drill a hole in the top for this...

http://www.jegs.com/i/Vibrant-Performance/231/16892/10002/-1