Canadian Airgun Forum

The #1 Community for Airguns in Canada!
It is currently Tue Nov 12, 2019 5:19 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  [ 10 posts ] 
Author Message
PostPosted: Thu Jan 30, 2014 3:14 pm 
Offline
User avatar

Joined: Tue Jun 26, 2012 3:52 pm
Posts: 392
Location: Saskatoon Sk.
So I spent last night modding my valve and the results were not good??? My old valve performed better??? Upon inspection I found this..........
Image

One valve stem had way more brass making it open no where near the other. Is this another Crosm :butthead: an detuned part?

_________________
41 years young :)


Top
 Profile  
 
PostPosted: Thu Jan 30, 2014 4:43 pm 
Offline
User avatar

Joined: Sun Jan 09, 2011 8:07 am
Posts: 3320
Location: Central West River Nova Scotia
I noticed the taper on the valve stem, Is that your mod or is it stock ? Also to answer your question, that much brass inside the valve will most certainly decrease you fps. However if you can turn down the stem to form that taper, you can also turn dtown the brass and taper it also.

_________________
If I had only one wish, it would be to be able to "unsay" things.


Top
 Profile  
 
PostPosted: Thu Jan 30, 2014 5:29 pm 
Offline
User avatar

Joined: Tue Jun 26, 2012 3:52 pm
Posts: 392
Location: Saskatoon Sk.
Yeah that taper is my mod. Drill chuck and a file :) problem now is that was the toughest part of the stem and Im sure I'll break or bend it if I try to turn down the brass.

_________________
41 years young :)


Top
 Profile  
 
PostPosted: Thu Jan 30, 2014 8:28 pm 
Offline
Supporting Member 2009
User avatar

Joined: Sun Dec 24, 2006 12:37 am
Posts: 3468
Location: Out There
There is no "detuned" valve for the 2240- the factory uses different suppliers for parts occasionally- it's possible that was one variant.

_________________
www.scopesandammo.com/storefront



Please note: I do not conduct business through Private Messages (PM's) in online forums. Please do not send a 'PM" with a business-related question.


Top
 Profile  
 
PostPosted: Thu Jan 30, 2014 8:40 pm 
Offline
User avatar

Joined: Mon Feb 11, 2013 12:46 am
Posts: 4114
Yes you can taper down the brass like Joe said you will be fine.
It will allow the CO2 to flow better. :wink:

_________________
"A candle loses nothing by lighting another candle"

Image


Top
 Profile  
 
PostPosted: Thu Jan 30, 2014 10:13 pm 
Offline
User avatar

Joined: Tue Jun 26, 2012 3:52 pm
Posts: 392
Location: Saskatoon Sk.
Well I got crafty with a Dremel and thin diamond saw blade. Spun it slow and cut off the excess brass. Now has the same range of movement as my other valve. Just playing around with the 2260 while I wait for parts.

_________________
41 years young :)


Top
 Profile  
 
PostPosted: Thu Jan 30, 2014 10:15 pm 
Offline
User avatar

Joined: Sun Jul 15, 2012 10:49 am
Posts: 6029
Location: Victoria, BC and Clarkston, WA
corman007 wrote:
Well I got crafty with a Dremel and thin diamond saw blade. Spun it slow and cut off the excess brass. Now has the same range of movement as my other valve. Just playing around with the 2260 while I wait for parts.



Shipped two days ago! :wink:

_________________
-Rick
Pardini K10
Brocock Concept .22
3 Custom Crosman 2260
Benjamin Discovery .22 w/Joe Hickey stock!
Crosman 150 pistol .22
4 Crosman MK 1 pistol .22
Mrodair CP-1M .22 and .177


Top
 Profile  
 
PostPosted: Thu Jan 30, 2014 11:44 pm 
Offline
User avatar

Joined: Sat Nov 03, 2007 4:19 pm
Posts: 8973
Location: Coalmont BC
The length of the brass makes no difference in how far the valve can open.... it takes up a tiny amount of volume, however....

Bob

_________________
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal;
Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


Top
 Profile  
 
PostPosted: Fri Jan 31, 2014 1:09 am 
Offline
User avatar

Joined: Wed Mar 26, 2008 7:12 pm
Posts: 2368
Location: Woodstock
You only want enough of that brass to hold onto that stem. Anything else is taking up volume in your valve. Streamlining, like that on stem really helps movement.
One thing, be careful not to open things up too much from the transfer port to the pellet. Too much volume means less pressure and more time.

_________________
Daisy Red Ryder


Top
 Profile  
 
PostPosted: Fri Jan 31, 2014 2:53 pm 
Offline
User avatar

Joined: Tue Jun 26, 2012 3:52 pm
Posts: 392
Location: Saskatoon Sk.
Thanks for the advice guys. Don't worry Rick your parts aren't holding me up buddy :)

_________________
41 years young :)


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 10 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 2 guests


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