Cheap aux tank build

[tatu]

Always good fun to have a look at that experiment.

Ha! Is that still about?

 

[Vmass]

Well, as far as I'm concerned this thread can be closed. As long as you keep the auxiliary fuel tank below your roof line, you are good to go. Than you.

 

[DohcBikes]

 

[tkent02]

,

That's it.

Now make a video so those who can't do math can understand.

 

[tatu]

Ok, I'll bite...

what has this to do with the level of the fuel tank? And just to be clear, In this context.

 

[Who Dat?]

Holy Cow, $52 for a plastic bottle?

I too have the $52.00 plastic bottle (although I think I paid $40 on ebay) ...

No, I did not pay that much. It can be found much cheaper, as Vmass has found. I think I paid around $30, but the convenience of having something that is made just for that purpose is worth the price. Having to find some place to store a lamp base would be considerably more difficult than just assuring the plastic bottle is empty and hanging it from the end of the storage shelves.

 

[DohcBikes]

It has more to do with accelleration than height, but height is the catalyst for accelleration and accelleration is what raises the pressure.

However the likelyhood of that pressure difference from having the tank a foot or two higher than the stock tank actually having any measurable effect on the pressure at the float valves is little to none. The level of the lowest point of the feed line is also factor. The video that is posted actually has too many variables to really prove that what was mentioned would happen.

 

[tatu]

It has more to do with accelleration than height, but height is the catalyst for accelleration and accelleration is what raises the pressure.

However the likelyhood of that pressure difference from having the tank a foot or two higher than the stock tank actually having any measurable effect on the pressure at the float valves is little to none. The level of the lowest point of the feed line is also factor. The video that is posted actually has too many variables to really prove that what was mentioned would happen.

Not sure what you mean by variables, but that tank was full, and it was 15 ft ish off the ground, the bike idles and revved and no leaks, I think it proved well enough that the sky stays up when the fuel level is a foot, two, ten feet is no difference to the ability of the carb floats/needles, man inside with a rubber bung to do its job

 

[DohcBikes]

Not sure what you mean by variables, but that tank was full, and it was 15 ft ish off the ground, the bike idles and revved and no leaks, I think it proved well enough that the sky stays up when the fuel level is a foot, two, ten feet is no difference to the ability of the carb floats/needles, man inside with a rubber bung to do its job

I thought that's pretty much what I just said. Conversation is over as far as i'm concerned. Have a great day.

 

[bomber737]

wow you guys, math in public (scarry) en all entertaining though. I just put it up for what its worth for the new guys. This was just another idea how to do a particular job I thought I would share. I have never had a problem with leaking fuel needles because I set them correctly, I replace them when they have witness marks and they should not leak if they are set correctly. we have the spec in our manuals after all and fantastic cleaning tutorials with pictures. If you follow the cleaning tutorial you can't go wrong. Once I get a bank cleaned I fill the them up and leave them over night (sitting up right) hooked up to my little tank and see if I have any seepage. If I do I take them apart to see why, speck of dirt or mis set float level etc.

I run a Pingle petcock and I have forgotten it on for days and my engine case did not get filled with fuel sneaking past the fuel needles. I know this because I check my oil before I ride my bike every time. The little tank only holds 1 gallon and there is no way this puts as much pressure on the floats as a full tank of gas. But I have found its enough to cause seepage if its going to happen.

I could never put my tank on a ladder nor would I recommend doing that because I would for sure knock it down or the dog or one of the kids and dent the crap out of it.

 

[Griffin]

The step ladder I use has a platform about three feet off the ground, like this:

With a rubber hook strap holding it to the ladder, you'd have to try pretty hard to knock it off or tip the ladder over.


I think the total investment for my rig is $4 for the fuel line.

 

[1948man]

http://www.thegsresources.com/_forum/showthread.php?184888-Aux-Fuel-Tank&highlight=

This works for me

 

[Grimly]

Whatever your method, don't raise it any higher than the stock fuel tank, it might force gas past float valves that are just barely able to hold the pressure of a stock tank.

If your float valves are incapable of holding back a couple of extra feet of head, that's a warning sign they need looked at, seriously.
I'm in the ride-on mower tank as set-up tank from the ceiliing / stand camp. Previously, I was just using the standard bike tank and sitting it on an adjacent 55gal drum or benchtop, but became disenchanted with that. I much prefer a small, easily handled dedicated unit.

 

[60ratrod]

wow, glad to see that I'm not the only one that made their own aux bottle. I made mine out of a windshield washer fluid bottle. the fun part was getting the cap to seal

 

[Crankthat]

Found a rubber piece off a old electrical pedal from a old piece of machinery one day.
Kept the electrical from getting wet where the cord hooks up.
Fit a fuel line perfect inside.
The outside is tapered.
Fits snug inside most soft drink type bottles.
Cut a soda bottle bottom off and attached a rip of nylon cord.
Hangs wherever.
Could likely do the same with one of those rubber wine corks drilled in the center.

Now how cheap am I?
Have fun guys....

 

[hannibal]

wow, glad to see that I'm not the only one that made their own aux bottle. I made mine out of a windshield washer fluid bottle. the fun part was getting the cap to seal

Do you want the cap to seal?

I've been using this elaborate setup: a water/soda bottle with a hose stuck through a hole I cut in the cap.


I use some Velcro straps to strap it to the top frame rail where the real tank normally sits. Because it's sealed, the bottle starts to collapse as the fuel flows out. I have to undo the Velcro, turn the bottle right side up, and crack the cap to let air back in. I've been having problems getting a vacuum reading on my Carbtune. The non vented bottle is the only thing I think I could be doing wrong.

So my question is whether the aux tank should be vented.