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low fps ???

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El Zilcho View Drop Down
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    Posted: 29 January 2005 at 7:22pm
I have a 98c. It has an e-bolt, and I never had a problem. I just got a low pressure kit and now my velocity tops out at 250 fps. I have no leaks, my dwell and lpr are adjusted to specs, and my reg is putting out 500 psi. I know that the LPK should run at 300-400. Any ideas would be appreciated.
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Oedipus View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Oedipus Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2005 at 12:56am

I"m not sure, but if you can, try bumping your Reg output up a little bit. That may fix your problem.

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El Zilcho View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote El Zilcho Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2005 at 7:25am
I think that would fix my problem, but I would have to get a new reg. Then, with only a 200 psi difference, I should just get rid of the low pressure kit all together.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Oedipus Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2005 at 12:13pm
What reg do you have on it?
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El Zilcho View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote El Zilcho Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2005 at 1:13pm
Shocktech in-line 150-500 psi with a smart parts gauge
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 98c Dude13 Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2005 at 4:40pm
 Your problem is because all tippmanns run on 800-850psi.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote triggerhappy1 Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2005 at 6:07pm

^ he has the LPK which makes it operate around 400psi.

do you use HPA, or co2? if its cold out, co2 wont give you much pressure after the tank cools. maybe not even over 400psi. so keep your tank inside for a while, or soak it in warm water, and give it a try. when winter is over and its warm, try chronoing again. also add some oil.

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El Zilcho View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote El Zilcho Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2005 at 6:41pm

I have a 850 pre-set tank, and plenty of oil. Could there be something wrong with the low pressure kit?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote triggerhappy1 Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2005 at 6:51pm

its a possibility. there could be something wrong with the valve or drive spring. but you said the dwell is set good, so thats ruled out. if anything, its your reg. do you have a gauge on it to tell you exact pressure? also, have you messed with your velocity scre at all (if there is one on LPK)?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote BobbyG Quote  Post ReplyReply Direct Link To This Post Posted: 31 January 2005 at 1:11am
Get the Maddmann Spring kit and run the Red Spring ( stiffest ) . I run a A5 with that spring and and run my gun at 280-300psi with the low pressure kit. Adust your velocity screw all the way up and use the reg to adjust your velocity.

Edited by BobbyG
My A-5 :

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Post Options Post Options   Thanks (0) Thanks(0)   Quote LordJovian Quote  Post ReplyReply Direct Link To This Post Posted: 31 January 2005 at 8:30am

More than likely your drive spring is bent or has lost tension some how. You can get a new drive spring, or order a stronger one. Also polish your internals to drop the pressure more. You can get the pressure fairly low and still have the right fps. It just takes a few mods.
For an easy fix, get a drive spring here. http://www.chasepb.com

Or, get the maddmann spring kit from a site like County paintball or 888paintball or search the net for one.

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Clark Kent View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Clark Kent Quote  Post ReplyReply Direct Link To This Post Posted: 31 January 2005 at 9:32am

You might try turning DOWN your regulator.  It is possible to put too much pressure into a gun, to the point of reducing efficiency.  See if you don't gain some fps by putting the reg down to 400 psi or so.

Other than that, I second the drive spring suggestion.

And, just to make sure - did you install ALL the pieces with the LP kit?  In particular, did you install the new lighter hammer/rear bolt?  Using the LP kit with the stock hammer could give the result you are experiencing...

Good luck.

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El Zilcho View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote El Zilcho Quote  Post ReplyReply Direct Link To This Post Posted: 31 January 2005 at 11:45am
My gun has an e-bolt, it does not have a drive spring.
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