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Old 02-21-2010, 03:59 PM #1
"Stay Golden Pony Boy"
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Join Date: Dec 2009
GEO Velocity Question

Had my new Geo for a couple of weeks. Shot a couple of cases through the gun with the stock bolt. Velocity stayed very consistant with the stock bolt, hovered around 280 fps.

A couple of days ago I got the new ST kit and installed it. Went out yesterday to test it out and my velocity was very very low, around 200 fps. I adjusted the screw on the inline reg and the prop shaft screw. The highest velocity I got was about 230 fps.

Does anyone have any suggestions why this may be and how to fix this situation? I would really appreciate the help.
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Old 02-21-2010, 04:02 PM #2
Suspicious Itch
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Join Date: Jun 2009
Location: UK
Suspicious Itch owns a Planet Eclipse Geo
Did you put the 2 half velocity restrictors around the prop shaft...? Or did you only install the bolt and can.
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Old 02-21-2010, 04:03 PM #3
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Join Date: Jul 2009
Location: M.I Florida
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did you put in the volume restrictor to? the black thing that comes with the st kit?
or did you not up your dwell by 2ms?
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Old 02-21-2010, 06:14 PM #4
Uziel Gal
It's not a Geo2, honest..
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Join Date: Mar 2004
Location: London, UK
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As mentioned above, if you did install the volume restrictors, take them out again; they are actually intended specifically to reduce the velocity of your marker, and should only be installed when you are looking to shoot at very low velocity - when using Reballs for instance.

While the ST kit works perfectly well with normal paintballs - and is certainly still advantageous when doing so - one of the purposes of the ST kit was to make the Geo more compatible with Reballs. Amongst other things, lowering the HPR pressure and/or the dwell in order to reduce velocity lead to cycling issues. The volume restrictors are included to reduce the amount of air used to propel the ball, allowing for a lower velocity without having to drop the dwell or pressure.

If you want full velocity, you don't install the volume restrictors.

As Austin mentioned, dropping the ST kit straight in to your marker without increasing the dwell could also lead to a reduced velocity.
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Old 03-06-2010, 05:16 PM #5
Join Date: Dec 2004
Location: Hyattsvile, Md
 has been a member for 10 years
I have the same issue. I have the GR-2 and the GST kit and the best I can do is 270-285 with the HPR adjusted all the way out. No I do not have the Vol restr. on. Actually I put it on my stock prop shaft so I don't have to take it on and off.

I also fiddled with the Volume screw on the prop shaft with out much difference.
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