Problem with 98c w/A.C.T

Hi,

Just bought a 98c with A.C.T and I installed some upgrades on it recently and it started acting weird after the upgrades. I put a Macroline Kit on it as well as a Tippmann X-Chamber and Orange Howitzer bolt.

I hadn't tested anything since the upgrades because I didn't have any paint. Today I tested it and for some reason after every 3rd or 4th shot it would uncock it self and do the machine gun thing. Maybe my C02 is low or I didn't put something in right i don't know. I'm going paintballing this weekend so I kinda need a fix for it asap.

Thanks.

Does sound like low C02.  Why did you change out the bolt?

inf3kt wrote: I was told that when its really cold out that the X-Chamber is not a good thing to have so I think maybe the X-Chamber was the problem.

And you took them for their word?  No logical reason given?  Before you give up on C02, put your stock bolt back in and see if that changes anything.  Don't throw more money at a problem in the hopes that will be the solution.  Tippmann markers usually work best with their stock internal components.  Swap the bolt out before you do anything else. 

Edited by StormyKnight - 01 March 2008 at 11:20pm

I could be wrong, but it is my understanding that an x chamber will make your 98 work better in cold weather not make it worse. And as already stated your 98 doesn't really need it's internal parts upgraded.

Edited by jordanpischke - 02 March 2008 at 2:49am

inf3kt:

I can not imagine any reason for a bolt/expansion chamber conflict in a Tippmann marker.  The relationship between the two parts just makes it highly unlikely.

It could be an expansion chamber problem although I've usually seen good results with the Tippmann chambers.  It is possible that small apertures inside the expansion chamber (which help prevent liquid CO2 from entering the marker) are getting blocked by liquid CO2 freezing into a solid form during firing.

You should also keep in mind that CO2 becomes less effective as temps drop below 55-60 F.

I would however try replacing just the bolt first.  The link that moto posted above was quite useful.  The bolt description mentions an internal o-ring that seals around the power tube.  If this ring is too tight, it could be creating friction which interferes with the free movement of internal parts.  That additional friction combined with the lowered CO2 performance due to the cold weather conditions could be sufficient to produce the problems you mentioned.

The marketing for the Orange Howitzer bolt really annoys me.

Manufacturer Description wrote: The Howitzer is made of Polyoxymethyl (better known as "POM") which is an easily sliding and self lubricant plastic that makes any internal scratching of the marker impossible. The tip of the bolt is fade coloured orange. A second internal o-ring is sealing the air between the powertube and the bolt. The result is a higher (gas/air) efficiency and better performance of the complete system.

The claim of better efficiency (at least on stock Tippmanns) is BS

• The Tippmann velocity adjuster interferes with the speed of gas release, not the amount.
• The same amount of gas is released with every shot.
• Even if this bolt does seal better, the same amount of gas will still be released with every shot, just at a slower rate when velocity is adjusted back down to the desired level using the stock adjuster
• There might be an efficiency increase if a rear velocity adjuster was installed in conjunction with this bolt, but the manufacturer doesn't mention that.
  

"Grasshopper" here hears, but he does not listen.  The path to wisdom is blocked by such obtacles.

Its not that I dont learn I just like to have good components so I can get the best out of all my stuff.

Turns out it was the Howitzer Bolt that was causing all the problems. My gun worked flawlessly yesterday and I had a consistent velo @ 280-290 all day.

Well did you try sanding down the part of the powertube that guides the bolt's movement as the instructions suggest you do?

Edited by nickname - 10 March 2008 at 10:36am