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Old 04-22-2014, 11:08 PM #1
dom088
 
 
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Smile Gti shooting

Hey guys

I just did the fitted oring rebuild kit for my gti
I'm at 120psi and shooting 294-298 with the odd 284 in there.
I don't even have 500 balls through yet.
Dwell is 13ms
Any thoughts?
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Old 04-22-2014, 11:12 PM #2
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Put dwell back to 12 and get more paint through it and lube a tad bit heavier during break in.
depending on which orings your using and where makes the differences.
what fitted kit did you buy?

Fitting orings don't just lower your pressure by installing them. You have to wear them in and depending on materials is how long the break in will take.
between 6-10 cases of paint.
500 rounds its nothing for breaking in orings.
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Old 04-23-2014, 01:20 AM #3
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020 buna. Bolt keg outer and valve keg outer
017 poly (white oring) on valve and spacer inner and outer. And bolt keg inner
011 poly (white oring) on power tube
014 buna bolt tip
016 viton bolt switch oring


Aggressive hand fitted
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Old 04-23-2014, 09:06 AM #4
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There is your problem. The inner spacer and outter should be Buna 017 and the bolt keg inner should be Buna 017 also.
Your creating to much drag and causing the pressure to be higher to cycle the marker.
Change those and get some paint through it.

This is what you want to set it up as.
valve) Polly 017x3
Power tube) polly 0112
Bolt sail) 016 Vinton or Buna
Settings
Eye delay 5.0ms
bolt delay 10.5
Dwell 12ms

Everything else stock settings and stock bolt no spring mod. If spring mod with Pooty FF bolt things will change.
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Old 04-23-2014, 09:04 PM #5
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So should I not even bother with the spring?
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Old 04-23-2014, 10:16 PM #6
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Is it a stock Bolt or Pooty FF bolt?
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Old 04-24-2014, 12:42 AM #7
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Stock bolt
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Old 04-24-2014, 07:43 AM #8
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Its entirely up to you if you want to leave the spring.
Just used the recommended orings in the recommended locations and you will be fine.
You could see a tad bit of FSDO just up the setting to
Time delay 10sec
FSDO dwell 1.0- 1.5ms
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Old 04-25-2014, 12:54 AM #9
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Ok so I did those settings. Didn't touch anything and am shooting 283-286. Little "kicky" Operating pressure shows 118psi now
Buna and the glossy orings. Vitons are matte.?
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Old 06-01-2014, 07:47 PM #10
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Ok so I played with this set up today finally. It was shooting 290s consistent.
After 2 games it started to beep at me with "over pressure" on the display. Pressure was 130.
So I went to drop the pressure. Got it shooting 270-280 with 123-125 pressure
I can't get it lower for shooting high velocity
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Old 06-01-2014, 11:30 PM #11
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My GTi was over pressure last weekend too and my reg screen was super caked with white dust. Perhaps you might get lucky looking there too.
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Old 06-02-2014, 12:36 AM #12
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I had the same issue with my fitted oring kit at first. The best way I found to mitigate the problem was to use lots of lube on the powertube and valve. If i didn't cake the rings in lube, I would get issues.
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Old 06-02-2014, 12:43 AM #13
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So this could be from the fitted orings. Once they are broken in it will be fine?
And pressure will drop on its own?
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Old 06-02-2014, 01:20 AM #14
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I don't know about yours, but I was running 117 psi to get to about 280 in stock dwell. Now I'm running about 95 psi to get there.
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Old 06-02-2014, 07:54 PM #15
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Did you have to turn your pressure down because at those settings it was shooting too high?

So one day u chrono'd and it was shooting too high
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Old 06-02-2014, 08:04 PM #16
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no when I first installed kit, I couldn't get my gti to shoot 280 at the settings I had. Even resetting to default, I wouldn't be able to hit 280 unless I was at 117 psi.

It was only until I added a ton of lube that I was able to get it to about 105 for 280. Breaking it in more has gotten me to my current results.
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Old 06-02-2014, 08:10 PM #17
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If you search the threads we all say apply a bit of extra lube when you install the kit till break in.

You could also have other issues that is causing these problems.
But mainly lubing a bit heavyer than normal until broken in will show the results in the end.
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Old 06-03-2014, 01:09 AM #18
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What are other problems that can cause this?
I will lube it quite a bit until a get 5-6 cases through it?
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Old 06-03-2014, 01:22 AM #19
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Pollys take between 8-12 cases to break in.
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Old 06-08-2014, 08:08 AM #20
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Agreed. When I first put my fitted kit in I was a bit weary, I have 10k shots through it now and its great. 280-290 at just over 100psi ( 102 I believe). Also, are you under boring? That makes a great difference in lowering your input pressure and achieving your desired velocity.
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