Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 75 users online :: 2 registered, 0 hidden and 73 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Is this Shock Pump worth it/what are good brands?

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

Is this Shock Pump worth it/what are good brands?

Unread postAuthor: cowscankill » Tue Dec 17, 2013 11:29 pm

Like several other spudders, I'm out of hibernation for an annual gun build. I've got some stuff coming up, but first some concerns.

I was thinking of buying this shock pump within the next day since I have the money and it's not as much as I thought it would be: http://www.amazon.com/dp/B004HHNHF2/ref ... UARLACPNOA
Image

There's only one review and I can't get a ton of detailed info I want, like stroke volume, but it looks solid overall. I mainly want if because it can go to 600 psi, which is higher than most Amazon shock pumps. It might actually be the only one and with Prime shipping they almost have my money.

I plan on using it for future metal HPA guns (finally!) and for pumping guns past my limit of 120psi. I had a few questions though:
The newest gun I'm making uses (as far as I can tell) a brand new burst disk design and I have a limit of about ~250 psi (that's some thick pvc, yo). My biggest concern is the stroke volume on any shock pump. Will it take long trying to fill a 2"x30" pvc chamber with a shock pump?
Are there any floor shock pump designs out there, and would that even be worth it?

And no, for now I can't make my own. Thanks in advance guys, I hope you'll enjoy what I have to post in the next couple weeks.
  • 0

"Make everything as simple as possible, but not simpler." - Albert Einstein
User avatar
cowscankill
Corporal
Corporal
 
Posts: 69
Joined: Sun Apr 10, 2011 8:09 am
Country: United States (us)
Reputation: 6

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: tigerblues28 » Wed Dec 18, 2013 12:01 am

That's a big chamber for a foot pump, let alone a shockie. I think it would take a loonngg time to fill it up, I think you should double think such a big chamber. Ill let an expert tell you the stroke volume or whatever. It doesn't look big.

I'd buy it :D and I might buy one sooner or later,

Nick
  • 0

User avatar
tigerblues28
Staff Sergeant
Staff Sergeant
 
Posts: 104
Joined: Mon Apr 01, 2013 12:56 pm
Country: United States (us)
Reputation: 3

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: Gippeto » Wed Dec 18, 2013 12:06 am

Filling a 2"x30" chamber to 250psi with a shock pump is going to take a while...a long while. :lol:

How is it that you can build the launcher but not a pump??? :)

Might be something in the how to section...if a fellow looks past the first page. :)
  • 0

"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2393
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: cowscankill » Wed Dec 18, 2013 3:01 am

Hehe, I've been here a few years and I've seen a few shock pump builds, but I just can't dish out that much extra money right now. I've pretty much spent all I can on this build, but for Christmas I got an Amazon gift card so I'd be able to buy a shock pump.

I might just wait on that shock pump then, see if I can't get this thing working with a footpump.
  • 0

"Make everything as simple as possible, but not simpler." - Albert Einstein
User avatar
cowscankill
Corporal
Corporal
 
Posts: 69
Joined: Sun Apr 10, 2011 8:09 am
Country: United States (us)
Reputation: 6

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: wyz2285 » Wed Dec 18, 2013 5:53 am

That's a decent pump, I got one similar and it tops 600 psi. You'll get tired of it very quickly, even fill a 20ml chamber to a decent pressure is a quite boring process...
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: PeteS » Wed Dec 18, 2013 6:24 am

A number of different brands use the same casting for their pumps. Mine looks just like that one only shorter, with a 300 psi gauge, and with a different handle. The one you picture looks like an improvement on mine and mine works very well for what it is.

Just to calibrate the statements so far, with mine I think it takes something like 150 strokes just to get to 45 psi with a 2"x8" chamber. I doubt anyone would not quit the first time if using it to pump a 2"x30" chamber to 600 psi. It does work great for mini or pen type guns and is usable for charging medium sized hybrids like mine with a 2"x8" chamber if you aren't in a hurry.
  • 0

My wife upon seeing my latest hybrid and hearing an explanation of it:
"That really isn't a potato cannon anymore, is it?"
User avatar
PeteS
Sergeant Major
Sergeant Major
 
Posts: 180
Joined: Wed Sep 11, 2013 5:53 pm
Location: Maryland
Country: United States (us)
Reputation: 12

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: sagthegreat » Wed Dec 18, 2013 8:11 am

Fill gun to 120 psi with foot pump or compressor, top it off with shock pump? Or just use a fridge compressor.. they go to like 800 psi
  • 0


sagthegreat
Captain
Captain
 
Posts: 343
Joined: Thu Feb 16, 2012 5:23 pm
Location: Leesburg
Country: United States (us)
Reputation: 1

Re: Is this Shock Pump worth it/what are good brands?

Sponsored

Sponsor
 


Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: jackssmirkingrevenge » Wed Dec 18, 2013 9:08 am

sagthegreat wrote:Or just use a fridge compressor.. they go to like 800 psi


If you are unwilling to build a HPA pump and don't have arms like tractors, this is the most viable option to take a large chamber to high pressure.

That being said, higher pressures usually mean you can get away with relatively small chambers.

If you want to limit yourself to 250 psi or so though, there is another option, also on amazon: http://www.amazon.com/Topeak-JoeBlow-Fl ... mp+260+psi
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: PeteS » Wed Dec 18, 2013 9:36 am

jackssmirkingrevenge wrote:
sagthegreat wrote:Or just use a fridge compressor.. they go to like 800 psi


If you are unwilling to build a HPA pump and don't have arms like tractors, this is the most viable option to take a large chamber to high pressure.

That being said, higher pressures usually mean you can get away with relatively small chambers.

If you want to limit yourself to 250 psi or so though, there is another option, also on amazon: http://www.amazon.com/Topeak-JoeBlow-Fl ... mp+260+psi


I just read the description. The three modes for different pressure ranges sound really interesting.

It is kind of expensive for a bike pump, but it sounds like no other bike pump that I have seen. Also, if you look you can find it a good bit cheaper.
  • 0

My wife upon seeing my latest hybrid and hearing an explanation of it:
"That really isn't a potato cannon anymore, is it?"
User avatar
PeteS
Sergeant Major
Sergeant Major
 
Posts: 180
Joined: Wed Sep 11, 2013 5:53 pm
Location: Maryland
Country: United States (us)
Reputation: 12

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: cowscankill » Wed Dec 18, 2013 11:33 am

sagthegreat wrote:Fill gun to 120 psi with foot pump or compressor, top it off with shock pump? Or just use a fridge compressor.. they go to like 800 psi


I've been keeping an eye out for one for at least a year. Where I dorm, a lot of people have personal fridges, so within a year or two I'll see if I can't get/buy one off of a friend.

To clarify, the gun design uses a burst disk set up but is purely pneumatic. It's the next generation of this, my last gun: http://www.spudfiles.com/how-to-database/topic24868.html It's not a hybrid; I will only make one out of metal, and probably smaller (think Kar98K size).

In the end I think I'll just use a floor pump. But dat Amazon Prime... expect another air rifle maybe in the summer or next year. I'll have the whole spring semester in my way :(
  • 0

"Make everything as simple as possible, but not simpler." - Albert Einstein
User avatar
cowscankill
Corporal
Corporal
 
Posts: 69
Joined: Sun Apr 10, 2011 8:09 am
Country: United States (us)
Reputation: 6

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: Ragnarok » Wed Dec 18, 2013 12:42 pm

cowscankill wrote:personal fridges

You want to watch that. The heat exchanger in smaller units sometimes isn't vapour compression - I believe the Peltier effect is a common alternative.
  • 0

Does that thing kinda look like a big cat to you?
User avatar
Ragnarok
Chief of Staff
Chief of Staff
 
Posts: 5339
Joined: Tue Dec 19, 2006 8:23 am
Location: The UK
Reputation: 8

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: jackssmirkingrevenge » Wed Dec 18, 2013 12:50 pm

Ragnarok wrote:You want to watch that. The heat exchanger in smaller units sometimes isn't vapour compression - I believe the Peltier effect is a common alternative.


Yup... almost got a face-full of high pressure ammonia once.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: tigerblues28 » Wed Dec 18, 2013 2:49 pm

Yuck..

I got a full inhale of gasoline smoke & fumes after dumping a bottle of it onto an open fire.

I had a migraine for two days straight, not a way to spend vacation..
  • 0

User avatar
tigerblues28
Staff Sergeant
Staff Sergeant
 
Posts: 104
Joined: Mon Apr 01, 2013 12:56 pm
Country: United States (us)
Reputation: 3

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: Ragnarok » Wed Dec 18, 2013 4:18 pm

jackssmirkingrevenge wrote:Yup... almost got a face-full of high pressure ammonia once.

Not quite "yep", as that's actually an absorption refrigerator - but you have a valid point, that's also common in smaller units and probably the thing to be more careful about as it'll be a lot easier to mistake for a vapour compression unit than a Peltier cooler.
  • 0

Does that thing kinda look like a big cat to you?
User avatar
Ragnarok
Chief of Staff
Chief of Staff
 
Posts: 5339
Joined: Tue Dec 19, 2006 8:23 am
Location: The UK
Reputation: 8

Re: Is this Shock Pump worth it/what are good brands?

Unread postAuthor: cowscankill » Thu Nov 17, 2016 4:00 pm

Lo and behold, I'm digging up a really old thread because I didn't realize I posted this three years ago. I'm working towards HPA and I had questions about it, but what do ya know I already have a thread with a lot of answers. Instead of making a new thread I figured I could just keep all of my relevant posts together...

I thought it would be fairly relevant to post I'm finally getting a '300' psi shock pump (with a 400 PSI gauge, and description says 400 PSI or 28 bar max) that I'll be using on a metal piston gun in December. It's less than $20 USD from Ebay, cheaper than Amazon for any US residents looking for one of these things. The pump listed in the original post isn't available apparently, but I didn't look around for it.

http://www.ebay.com/itm/262719913030?_t ... EBIDX%3AIT

I'll be using this on a black iron gun I'm designing with ~2 cubic inch chamber.
  • 0

"Make everything as simple as possible, but not simpler." - Albert Einstein
User avatar
cowscankill
Corporal
Corporal
 
Posts: 69
Joined: Sun Apr 10, 2011 8:09 am
Country: United States (us)
Reputation: 6

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Yahoo [Bot]

Reputation System ©'