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Big syringes

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Big syringes

Unread postAuthor: SpudFarm » Mon Feb 28, 2011 12:11 am

Hello, I am thinking about giving my hybrid another round of small updates. Not to make it more impressive but to make it more user friendly.

The first thing I need is a syringe like object big enough to fuel a 7.359l chamber.
That would be a 3300ml syringe, now I am not asking specifically about a syringe but perhaps something that can be used in the same manner as one.

Ideas?
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Unread postAuthor: Lockednloaded » Mon Feb 28, 2011 12:18 am

A cheap bike pump dismantled and modified to fill in the notches that let air through on the pump head
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Unread postAuthor: jackssmirkingrevenge » Mon Feb 28, 2011 12:42 am

Why not just make your own? As it's not really pressure bearing you can make it out of PVC pipe, araldite and balsa wood, at least that's what I would do ;)
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Unread postAuthor: Technician1002 » Mon Feb 28, 2011 12:48 am

Another option is to make a meter pipe, but instead of a pipe, use a suitably larger container, such as a 1 liter pop bottle run at about 3.3 Bar.
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Unread postAuthor: mark.f » Mon Feb 28, 2011 12:50 am

I think jack's got about the right idea. Use a graduated cylinder to measure out 3300 mL of water, draw into your big ass homemade syringe, and mark the fluid level with a marker or pen.

EDIT: forgot to add, a good construction material would be any cheap plastic tubing (like acrylic). A plunger can be fashioned with some threaded rod, washers, and sheet rubber. The end of your syringe can be some 1/4" copper tubing cast into the end of the acrylic tube with some epoxy and tape spacers.
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Unread postAuthor: Crna Legija » Mon Feb 28, 2011 2:31 am

In fishing shops you can get worm pumps, there all nice stainless steal and have a intake port at the top that you could connect to you propane tank to. Around here there about 60$.
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Unread postAuthor: jimmy101 » Tue Mar 01, 2011 7:36 pm

... 7.359l chamber. That would be a 3300ml syringe ...

At that ratio you should be able to just use a pressure gauge and the slow gas delivery rate of a typical propane torch head. No need for a 3.3L syringe.
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Unread postAuthor: Lockednloaded » Tue Mar 01, 2011 11:56 pm

jimmy101 wrote:
... 7.359l chamber. That would be a 3300ml syringe ...

At that ratio you should be able to just use a pressure gauge and the slow gas delivery rate of a typical propane torch head. No need for a 3.3L syringe.


yea... whats steering you away from a manometric meter?
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Unread postAuthor: SpudFarm » Fri Mar 04, 2011 3:29 pm

Why not just make your own? As it's not really pressure bearing you can make it out of PVC pipe, araldite and balsa wood, at least that's what I would do


That's exactly what I had in mind if I didn't get a simpler solution here, I hate movable seals!


Another option is to make a meter pipe, but instead of a pipe, use a suitably larger container, such as a 1 liter pop bottle run at about 3.3 Bar.


That was the other idea I had a few months ago, but I am sick and tired of faulty gauges.


I think jack's got about the right idea. Use a graduated cylinder to measure out 3300 mL of water, draw into your big ass homemade syringe, and mark the fluid level with a marker or pen.


That's also exactly what I thought, I will suck in the required amount of water and mark the plunger rod 1X, 2X, 3X and so on.

At that ratio you should be able to just use a pressure gauge and the slow gas delivery rate of a typical propane torch head. No need for a 3.3L syringe.

yea... whats steering you away from a manometric meter?


I have been using it, and loved it for two years or so, nothing to complain about but my gauge failed and it's hard for me to get a new one.

I will also face my union on a lathe so I can finally(Hope) take it to 10x :)

Just keep the ideas comming, I want it to be as simple end reliable as possible.
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Unread postAuthor: jackssmirkingrevenge » Sat Mar 05, 2011 1:28 pm

SpudFarm wrote:That's also exactly what I thought, I will suck in the required amount of water and mark the plunger rod 1X, 2X, 3X and so on.


No need to get things wet, it's fairly easy to calculate the volume of cylinders ;)
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Unread postAuthor: turner » Sat Mar 05, 2011 1:39 pm

what about those big squirt guns with the plunger
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or how to make themhttp://www.instructables.com/id/5-Water-Guns/
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