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Ill Name It Shocky....

A place to ask general spud cannon related questions.
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Ill Name It Shocky....

Unread postAuthor: VH_man » Tue Jun 24, 2008 8:38 pm

Well, i was very happy today at the succesful construction of my first shock pump. beofre i give pics ill give the stats:

Pump Bore: .62"
Pump Bore Material: 1/2 inch Type L copper
Pump Shaft: 1/8 inch Steel Rod
Pump Head: 17/32 brass tubing and Epoxy
check Valve: Schrader Valve

Anywho's, Heres The pics. Keep in mind i still need a pressure guage and some kind of hose for my quick-connect, but all in all i am happy with this pump. I can acheve what i believe is around 400 PSI with ease (take a look at the last picture :wink:

The Pump In its Glory:

Image

The Pump Head:

Image

Pump Bottom Closeup:

Image

Method for Filling the .177 Stick gun:

Image

And my Favorite (doesnt need ANY explanation besides it was a 0-100 PSI guage)

Image

(the dial went around about 3 times when i opened the ball valve :D )
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Unread postAuthor: SpudFarm » Tue Jun 24, 2008 8:59 pm

nice freaking pump..

so cool gauge.. it has to be so accurate :D

the pump is a small volume sick bastard :D
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Re: Ill Name It Shocky....

Unread postAuthor: starman » Tue Jun 24, 2008 9:07 pm

VH_man wrote:And my Favorite (doesnt need ANY explanation besides it was a 0-100 PSI guage)

(the dial went around about 3 times when i opened the ball valve :D )


"Was" being the operative word there.... :lol: Nice pump VH!!
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Unread postAuthor: THUNDERLORD » Tue Jun 24, 2008 9:35 pm

Nice. I am thinking of building one like Gippeto's How-To.
But I'll refer to this one to see if there are different parts I may prefer.
Great pump.
LOL, I've done what you did to the gauge to a couple speedometers before.(usually the cable piece broke first though) :D 8)
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Unread postAuthor: Gippeto » Tue Jun 24, 2008 10:03 pm

Another nice pump for our viewing pleasure! :)

With a .62 bore you will be able to get some spectacular pressures. 550 psi is within reach, more if you change out that schrader. (they take about 70 psi to open)

Good job!
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Unread postAuthor: elitesniper » Tue Jun 24, 2008 10:59 pm

thats nicee, you took my shock is named shocky too, haha, mind to tell us how you made the check valve?
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Unread postAuthor: jackssmirkingrevenge » Tue Jun 24, 2008 11:20 pm

Shame you can't use it with Janet... the launcher, I mean ;)
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Unread postAuthor: Carlman » Wed Jun 25, 2008 12:14 am

lol jsr

very nice mate i really should get onto doing one of them..
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Unread postAuthor: psycix » Wed Jun 25, 2008 8:16 am

Nice pump indeed!
Its an floating o-ring design?
And how did you use a schrader as check valve?
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Unread postAuthor: Brian the brain » Wed Jun 25, 2008 1:02 pm

The shrader is used instead of the floating O-ring.
It's positioned at the front of the rod.

I think the floating O-ring design is easier, but I can;t deny this pump is a beauty!

You really should build yourself one of these psycix!!
It would really help your marblegun's performance.

You know...the one you STILL haven't posted... :D
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Unread postAuthor: Carlman » Wed Jun 25, 2008 1:11 pm

Brian the brain wrote:The shrader is used instead of the floating O-ring.
It's positioned at the front of the rod.

I think the floating O-ring design is easier, but I can;t deny this pump is a beauty!


isn't the scrader located near near the T because when the piston makes the compression stoke it needs a one way valve (scrader) to dump into the chamber without letting air come back. It looks like this is a floating O ring piston.
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Unread postAuthor: Brian the brain » Wed Jun 25, 2008 1:29 pm

Darn, you're right.
I mistook the end for a shrader.. :oops:
Never mind me...
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Unread postAuthor: Mr.Sandman » Wed Jun 25, 2008 2:07 pm

nice shock pump one day ill make one 8)
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Unread postAuthor: VH_man » Wed Jun 25, 2008 5:03 pm

it takes 70 PSI to open a schrader??? wow. Im going to remove the spring inside the valvestem and see if it makes my puming any easier

On a side note, i pressurized the .177 Stick gun to the point at which the Presta valve took a hammer to press in, and even then, the presta didnt do anything besides let out a little "pfft" of air. I had to ram a rod down the barrel to release the pressure :D

not to mention i had to unscrew my quick-connect because i coudnt press in the male quick-connect peice to release the pressure :twisted:
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Unread postAuthor: LikimysCrotchus5 » Tue Jul 29, 2008 11:18 pm

Hey i was just wondering (cause i still need to build a shock pump :roll: ) How did you get the check valve in there? Maybe a diagram?

Thanks.
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