mcarterbrown.com  

Reply
 
Thread Tools Search this Thread
Old 10-11-2013, 03:17 PM   #1 (permalink)
It's all good
 
Hook's Avatar
 
Join Date: Jan 2008
Location: Gatineau, Qc

CCM Fan
Velocity issues. Think I'm on the right track

Finally took my new-to-me cocker to the chrony. While it does seemed to be really well timed, I cannot get the velocity higher than 250. Reg is set to 300 (brand new CP reg), I've tried raising that a bit, around 325-330PSI, but higher than that and I get a drop in velocity, which I know is normal with cockers and the pressure buildup.

Turning the IVG 3-4 turns in makes little to no difference in velocity. Paint is matched with the barrel. I've tried a longer but softer hammer spring I had lying around, no difference.

Am I right in thinking the lower tube and valve might need a good cleaning? It's the only thing I've yet to try simply because I don't have a cocker valve tool.

Hopefully I can borrow one from a teammate and see if a cleanup - or even a valve swap - makes a difference. I've got a spare CCM S6.5 valve, spring and hammer spring lying around in my parts box.
__________________
Hook is offline   Reply With Quote
Old 10-11-2013, 04:00 PM   #2 (permalink)
Active Member
 
Join Date: Dec 2012

Did you try lowering pressure below 300.. Depending on he internals and springs 300psi may be on the downward part of the curve. Try 285 and see if it goes up?
Kroniccocker is offline   Reply With Quote
Old 10-11-2013, 04:09 PM   #3 (permalink)
It's all good
 
Hook's Avatar
 
Join Date: Jan 2008
Location: Gatineau, Qc

CCM Fan
Will give that a try and chime back later.

Also, I spoke to the previous owner. He said that he had it setup for interior play and never have the velocity past 250-260. He suggests trying a lighter valve spring and a stiffer hammer spring.

Thoughts?
__________________
Hook is offline   Reply With Quote
Old 10-11-2013, 04:14 PM   #4 (permalink)
Active Member
 
Join Date: Dec 2012

That generally will increase your velocity.. But decreases your efficiency. Are the springs colored by chance( at least your main spring)?
Kroniccocker is offline   Reply With Quote
Old 10-11-2013, 04:21 PM   #5 (permalink)
It's all good
 
Hook's Avatar
 
Join Date: Jan 2008
Location: Gatineau, Qc

CCM Fan
The hammer spring is black. No idea in the valve spring, will have access to the cocker tool this weekend.
__________________
Hook is offline   Reply With Quote
Old 10-18-2013, 10:43 AM   #6 (permalink)
It's all good
 
Hook's Avatar
 
Join Date: Jan 2008
Location: Gatineau, Qc

CCM Fan
Alright, I tried a stiffer hammer spring and a softer valve spring. I can get it between 280-290 fps, but only if I crank my regulator to 400psi.

That seems awfully high, unless I have some sort of high pressure valve I'm not aware of?
__________________
Hook is offline   Reply With Quote
Old 10-18-2013, 11:53 AM   #7 (permalink)
I like Guns and Cigars.
 
maggot's Avatar
 
Join Date: Jul 2008
Location: MO

Post a picture of your gun and a pic of your internals.
That will tell us the age of your gun and if you have the correct length bolt.
__________________


Otter Customs Paintball - - - - Straight Up Cigars - - - - My Feedback
maggot is offline   Reply With Quote
Old 10-18-2013, 07:21 PM   #8 (permalink)
It's all good
 
Hook's Avatar
 
Join Date: Jan 2008
Location: Gatineau, Qc

CCM Fan
Here you go:



Internals:


Closeup of the valve:
__________________
Hook is offline   Reply With Quote
Old 10-19-2013, 02:34 AM   #9 (permalink)
MCB Member
 
1shot's Avatar
 
Join Date: Apr 2013
Location: MN

Just a thought. Could the back block be hitting the cocking rod before it completes it's forward motion?
1shot is offline   Reply With Quote
Old 10-19-2013, 08:57 AM   #10 (permalink)
Official DSG Fanboy
 
Moosepatrol's Avatar
 
Join Date: Nov 2007
Location: Oshawa, Canada

Hook everything looks stock on your internals. Pressure and springing is what is your problem. I use a valve spring that is softer than stock in mine with a pressure of 275. Not the most efficient air wise but I can fluctuate my velocity all the way from 230 for indoor up to 280 for outdoor no problems. If you need tools or parts hit me up.
__________________
Quote:
Originally Posted by greenmtnphantom View Post
Win, loose, draw, leg chewed off by a beaver, doesn't matter it's a great idea
Quote:
Originally Posted by Robertsr View Post
"So there I was, sitting at the keyboard one handed, and I said to myself, 'that really looks like you're wife'..."

Quote:
Originally Posted by PistolRogue View Post
Thing's lucky it scampered off because I would have skulled it to death if I'd managed to get my hands on it.
Moosepatrol is offline   Reply With Quote
Reply

  mcarterbrown.com » Paintball » The Armory » WGP

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -4. The time now is 11:45 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO
© MCB Network LLC