Canadian Airgun Forum

The #1 Community for Airguns in Canada!
It is currently Thu Nov 21, 2019 3:54 am

All times are UTC - 5 hours


The Canadian Airgun Forums are a place for people to discuss and learn about airguns and the airgunning sport in Canada. There are lots of discussions about airguns, airgun accessories, reviews, modification and repair information, airgun events, field target and free classifieds!

 

You need to register before you can post: click the register link to proceed. Before you register, please read the forum rules. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload your own pictures, and access many other special features. Registration is fast, simple, and absolutely free! To start viewing messages, select the forum that you want to visit from the selection below.








Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: HiPac Installation
PostPosted: Wed Aug 19, 2015 9:11 pm 
Offline

Joined: Mon Jul 13, 2015 5:18 pm
Posts: 2
I have just recieved my HiPac cylinders for my 2240 and have a couple of questions for anyone who has put one on. The kit comes with a valve spring and a seal for the air valve.
I was able to remove the valve and open operate it with my finger. I could also unscrew the valve with my hands as the spring is not very strong, but the replacement one is over twice the length and has way more tension.
I was told by HiPac that unless the mod was made you could only put 2kpsi into the tube, but 3kpsi with the new spring mod. I now cannot even open the valve by and am wondering if I am missing something here. Will the hammer even be able to open the valve with this new spring?
I also recieved a new seal for the valve in the kit and was wondering if I am to remove the one from the valve by digging it out or just put both seals together.

While on this topic I would also like to ask about the theory of these guns. If using higher pressure air, wouldn't one want to use a softer valve spring and if anything a higher power hammer spring to give more power to launch the pellet?
Any input would be appreciated


Top
 Profile  
 
 Post subject: Re: HiPac Installation
PostPosted: Thu Aug 20, 2015 12:11 am 
Offline

Joined: Tue Oct 13, 2009 1:27 am
Posts: 2514
Location: Vancouver
Wow, actually had me chuckling there for a bit. It's a hammer spring, not a valve spring. You need a harder hammer spring to knock open the valve at 3,000psi. You may find, as I did, that it's not necessary to have the whole length of it... I ended up using just 29mm of it then adding an RVA to tweak preload. But for starters just try the hard Powermax spring and see how it goes.


Top
 Profile  
 
 Post subject: Re: HiPac Installation
PostPosted: Thu Aug 20, 2015 11:40 am 
Offline

Joined: Mon Mar 09, 2009 6:46 pm
Posts: 1395
Location: r Alberta
I found they work better if you stay under 2000 psi. The pistol seems more accurate with less pressure.


Top
 Profile  
 
 Post subject: Re: HiPac Installation
PostPosted: Thu Aug 20, 2015 12:00 pm 
Offline

Joined: Tue Oct 13, 2009 1:27 am
Posts: 2514
Location: Vancouver
At a guess, it seems more likely that at higher pressure and otherwise unmodified one would see vastly excessive air dumping with each shot, making for a ridiculously excessive amount of power for the stock barrel, with a lot of high pressure air chasing the pellet out of the muzzle and perhaps causing it to tumble. The Powermax spring pushing a stock hammer so hard is going to make for too much recoil anyway, got to trim at least 40% off the steel to reduce that. But pressure alone would have nothing to do with accuracy being harmed. I did just fine for accuracy with mine at field target meets pumping to 3,000psi, but did a host of modifications to keep the amount of air used per shot down to just enough, nothing extra, keeping accuracy and reducing the noise and the number of trips to the pump.


Top
 Profile  
 
 Post subject: Re: HiPac Installation
PostPosted: Sat Aug 22, 2015 3:14 pm 
Offline

Joined: Mon Mar 09, 2009 6:46 pm
Posts: 1395
Location: r Alberta
I wasn't after a high shot count so keeping the pressure down was an easy way to solve the problem and eliminate the seal problems a lot of people have.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
News News Site map Site map SitemapIndex SitemapIndex RSS Feed RSS Feed Channel list Channel list

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group

phpBB SEO