Thread Tools Search this Thread
Old 10-09-2011, 02:33 AM   #1 (permalink)
Join Date: Oct 2011

help with 98 Custom Pro RT low velocity

I've completely replaced all internals in my 98 custom pro w/reactive trigger in order to improve a low velocity problem. 220 fps max. Upgraded the velocity to 240 fps. Installed a flat washer over main spring guide to increase tension on main spring. Upgraded velocity to 270. There must be a better way than compressing a new spring to raise the velocity to an acceptable level. My marker is a 2006 model and has served me well until recently.
rudedude is offline   Reply With Quote
Old 10-09-2011, 02:38 AM   #2 (permalink)
Post Whore
Jinx's Avatar
Join Date: Jun 2009
Location: WMass

Are you running CO2 or HPA? If it is HPA, tippmanns HATE low pressure. I think even with 650 you will get low numbers. Make sure you tank is putting out about 850 psi.

The shimming on the spring is one of the main ways to increase velocity. You can shim it open the valve longer. It is the same thing as getting a stiffer spring.

It also seems you have had it for some time. Could be wearing of the spring? Someone may want to jump in on that idead, but if it is shooting fine now, just leave it or add in the RT kit and shim it to a usable velocity.
Originally Posted by Talfuchre View Post
I want to put a warning in here. If you, in any way, bad talk bacon or attempt to steer anyone away from bacon, or even hint about the ethics of bacon - I will perm ban you.

Do not go gentle into that good night.
Rage, rage against the dying of the light.

Jinx is offline   Reply With Quote
Old 10-09-2011, 12:39 PM   #3 (permalink)
Active Member
ScreamingShiek's Avatar
Join Date: Dec 2010
Location: South Jersey

Stiffer spring is probably a correct fix. Tippmans control velocity simply by using the velocity screw to occupy space in the valve to slow air flow. If you have it wide open and still don't get above 270, you need a higher flow tank or a spring kit with a stiffer main spring.
ScreamingShiek is offline   Reply With Quote
Old 10-09-2011, 12:47 PM   #4 (permalink)
AKA Maggy Moo
magmoormaster's Avatar
Join Date: Jun 2009
Location: Orem, UT

Where's your FVA set at? If it's too far out/missing it can cause low velocity.

Originally Posted by Chad Thompson View Post
Who is this Chad Thompson you all are talking about?
magmoormaster is offline   Reply With Quote
Old 10-09-2011, 07:04 PM   #5 (permalink)
Scewball, One Each
Join Date: Jan 2008
Location: Michigan
Send a message via Yahoo to DarkShadowHunter

Replace the main spring with a stiffer one. Alternately you can get a Rear Velocity Adjuster to adjust the spring tension.

Also make sure the power tube is not damaged. That could cause issues. Another thing to check would be t-fitting for the response trigger. I had a low velocity issue with an issue with the RT not working properly. A broken t-fitting was the cause.

Last edited by DarkShadowHunter; 10-09-2011 at 07:11 PM.
DarkShadowHunter is offline   Reply With Quote
Old 10-09-2011, 08:55 PM   #6 (permalink)
Join Date: Oct 2011

Thanks to all who responded to my problem. I use hpa and tank puts out 850 psi. all internals are new and rt is working fine. I,ll polish the area where the hammer slides.
rudedude is offline   Reply With Quote
Reply » Paintball » The Armory » Tippmann

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 06:35 PM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO
© MCB Network LLC