Cheap aux tank build

[tatu]

Here we go.......

This subject started a very entertaining thread a few years back. If this one goes the same way, I'll sit back and watch before weighing in.

I ended the last one, probably too early for all the fun it was.

Er..I don't think so...

[Griffin]

Er..I don't think so...

Perhaps we're talking about two different ones then. I used the math stuff and that pretty much ended it. Looking at your join date, we evidently are. The thread I was referencing was probably back in '07 or so.

It was almost as good as the torque wrench thread.

[hampshirehog]

Er..I don't think so...

Always good fun to have a look at that experiment.

[tatu]

Perhaps we're talking about two different ones then. I used the math stuff and that pretty much ended it. Looking at your join date, we evidently are. The thread I was referencing was probably back in '07 or so.

It was almost as good as the torque wrench thread.

To be fair it was a long time ago and I've forgotten most about it, I do remember being alone and up against some very adamant people and got a bit mixed up myself but anyway it was fun.

[DohcBikes]

I just set the motorcycle's fuel tank on a step ladder next to the bike and use a 3' length of fuel line to connect it.

Stick a golf tee in the vacuum line, put the petcock on "prime", and off you go.......

Oh boy. No way man. My luck is not close to good enough.

[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.