Best way to do fuel line?

[raidmagic]

I am running my fuel line and am wondering what is the best way to do this. Should I put a petcock on the bottom of the tank and run the line to that like my old keg tank or should I put a fitting on the top of the tank and run it as a siphon? If as a siphon what do I put down in the tank that will stay in the gas and not rot? Thanks

 

[409T]

I am running my fuel line and am wondering what is the best way to do this. Should I put a petcock on the bottom of the tank and run the line to that like my old keg tank or should I put a fitting on the top of the tank and run it as a siphon? If as a siphon what do I put down in the tank that will stay in the gas and not rot? Thanks

I like the petcock in the bottom of the tank best, because every now and then I need to undo the line to a carb, and I can turn the gas off at the tank instead of filling my shoes. That said, I switched to a siphon a while ago trying to fix an unrelated problem, and the siphon works just as well, even with my electric fuel pump. To make the siphon I got a 90 degree brass fitting that would screw into the top of the tank, and a piece of either brass or copper pipe (CRS) that fit tightly into the bottom of the brass fitting, shoved it in and soldered the joint.

Jeff

 

[putz]

Rpm built mine I don't truthfully know what he uses in side but siphon is the way to go. If you get in a accident by the time you shut off the petcock you will have a nice CARBEQUE. So I say siphon tube. JMO

 

[Ted Brown]

All pro tanks draw from the top, you want no leaks at the bottom, plus you do want a quick shutoff at the tank if possible... Most use a steel line inside with a bronze filter sock at the bottom entrance and that is not right on the bottom in case of water...

 

[RPM]

All pro tanks draw from the top, you want no leaks at the bottom, plus you do want a quick shutoff at the tank if possible... Most use a steel line inside with a bronze filter sock at the bottom entrance and that is not right on the bottom in case of water...

It is a fuel tank Ted don't put water in it. LOL

 

[raidmagic]

Thanks for the info, can I come from the top of the side of the tank? I might not have the area to go up, I'm still working out my bed cover.

 

[Mike]

With a 90° bulkhead fitting in the top of the tank, you likely won't be as high as your fill bung and cap.

 

[Gerry]

With a 90° bulkhead fitting in the top of the tank, you likely won't be as high as your fill bung and cap.

Someone help me out here.
Once a siphon is primed, surely if there is a break in the line it will just keep on flowing until the level in the tank is below the break
My fuel pump is at the lowest part of the car and the tank will be the highest so is it a good idea to go this way or does nt it matter.
Gerry

 

[raidmagic]

With a 90° bulkhead fitting in the top of the tank, you likely won't be as high as your fill bung and cap.

Yea, I've thought of that but I'm thinking I might do a hole in the bed cover for the fill cap to stick out of...to many decisions. lol
Anyone point me to a place to get a bung and the line to go into the tank? I haven't found anything that makes me feel good yet.

 

[Ted Brown]

Is this a brand new tank? with no outlet line?? or top breather fitting either? Should be able to just bolt something in place, how about a fuel gauge sending unit? Anything is better than to drill and weld on a used gas tank, but if you do... put a hose into the tank from the exhaust pipe of your car for 20 minutes, this will clear it of fumes for welding... and when I say water in the fuel, a lot of slow gas stations end up with water in their underground tanks, and you get it for no extra charge...

 

[raidmagic]

Is this a brand new tank? with no outlet line?? or top breather fitting either? Should be able to just bolt something in place, how about a fuel gauge sending unit? Anything is better than to drill and weld on a used gas tank, but if you do... put a hose into the tank from the exhaust pipe of your car for 20 minutes, this will clear it of fumes for welding... and when I say water in the fuel, a lot of slow gas stations end up with water in their underground tanks, and you get it for no extra charge...

There are no holes in it other than the fill hole. It's a brand new tank never ad gas in it so drilling or welding won't be an issue

 

[GMRodder]

There are no holes in it other than the fill hole. It's a brand new tank never ad gas in it so drilling or welding won't be an issue

That is a bad assumption to make, some manufacturers use solvents to wash out their tanks.
Never weld a gas tank unless it has been washed and cleaned by yourself.
I use liquid laundry detergent and warm water to wash my tanks out before welding.
I drain them and then dry them, this will take out all fumes.

 

[Ted Brown]

There are no holes in it other than the fill hole. It's a brand new tank never ad gas in it so drilling or welding won't be an issue

Any new tank that I have ever seen, always has a breather hole/fitting somewhere in the top.. ?? or the breather tube in meant to be run inside the fill tube...

 

[RPM]

Any new tank that I have ever seen, always has a breather hole/fitting somewhere in the top.. ?? or the breather tube in meant to be run inside the fill tube...

We build somewhere around 150 tanks a year. We don't use a breather fitting in the top of the tank. We use a modern vented gas cap, which also has a valve in it to work as a roll over valve.

 

[Ted Brown]

We build somewhere around 150 tanks a year. We don't use a breather fitting in the top of the tank. We use a modern vented gas cap, which also has a valve in it to work as a roll over valve.

RULE #1 KEEP THE SHINY SIDE UP!

 

[RPM]

RULE #1 KEEP THE SHINY SIDE UP!

Ted this is how to turn the caps off on your computer. Push the button marked caps.