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Old 09-14-2016, 01:35 AM   #1
Young Gun
 
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Tokyo marui vsr 10 hop up problem

Hey guys i have some problem with my vsr 10 hop up, im using pdi palsonite cylinder vc, pdi inner barel 6.01 and a 550 fps spring pdi and im using a standard tokyo marui chamber. My problem is sometimes when i already set my hop for the best range, and i shot about 10 shots i got some shot that unhop and the bb just fall a bit. Anyone please can solve this problem ? Thank you
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Old 09-14-2016, 07:14 AM   #2
Oddsyns   Oddsyns is offline
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First of all see if the hop up arm is still at the same place and not unhoping.

Please check the bbs you are using. One of the most important things is actually the bbs.
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Old 09-14-2016, 12:06 PM   #3
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Quote:
Originally Posted by Oddsyns View Post
First of all see if the hop up arm is still at the same place and not unhoping.

Please check the bbs you are using. One of the most important things is actually the bbs.
Actually my hop is not moving, and i"m using a madbull point four bb.
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Old 09-14-2016, 12:33 PM   #4
 
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The hop up is backing off. Its one of the design drawbacks of the standard design. You will not notice it happening with lower springs, but with stronger spring you will.

Because of the design, your hop-up adjustment is on the same plane as your power system. The resulting shock of firing and the piston slamming into the cylinder head transfers that to the hop unit and slowly turns off your hop-up. It is the exact same problem M4 geared hopup units have. Hence why the TDC mod is a practical requirement for VSRs, or using the AA chamber which functions like a TDC.
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Last edited by Plazmaburn; 09-14-2016 at 12:36 PM.
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Old 09-14-2016, 12:39 PM   #5
Oddsyns   Oddsyns is offline
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Quote:
Originally Posted by Plazmaburn View Post
The hop up is backing off. Its one of the design drawbacks of the standard design. You will not notice it happening with lower springs, but with stronger spring you will.

Because of the design, your hop-up adjustment is on the same plane as your power system. The resulting shock of firing and the piston slamming into the cylinder head transfers that to the hop unit and slowly turns off your hop-up. It is the exact same problem M4 geared hopup units have. Hence why the TDC mod is a practical requirement for VSRs, or using the AA chamber which functions like a TDC.

That's exactly what I meant. So sorry to have not been as crystal clear as Plazmaburn was.

And consider buying yourself some GEOFFS .4 white bbs or, if you can, the BioAttack .4g white, which are even better.
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Old 09-14-2016, 12:42 PM   #6
bmr3   bmr3 is offline
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Nice explanation, I knew that the stock hop adjuster eventually backs off with use but I did not know why. It makes since now I realize that the hop adjuster and power plant are on the same plane.


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Old 09-15-2016, 01:32 PM   #7
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Plazmaburn is correct. This is most definitely the cause. Its a shame because the original Marui hop up units are wonderful.......but mainly with the stock parts only or anything rocking a 150 spring or below. 550fps will be just too powerful. You will need a decent hop up chamber to compensate for the additional power and one that remains steady and reliable. I wouldnt recommend the airsoft pro chamber as the BB feeder on these units are extremely weak (although the hop up itself is good) one foul shot or pull back will actually crack the feeder and load every BB into your chamber upon pulling the bolt. The action army Hop-up chamber is absolutely everything you will need. It has a smooth and strong BB feeder and the adjustment arm is so simple and effective.....I get ridiculous range and I'm running at about 500 fps. The simple answer is you need a strong hop up unit and Action army will fix your issue with there chamber. Hope you get it sorted.
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Old 10-06-2016, 12:35 PM   #8
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Quote:
Originally Posted by Plazmaburn View Post
The hop up is backing off. Its one of the design drawbacks of the standard design. You will not notice it happening with lower springs, but with stronger spring you will.

Because of the design, your hop-up adjustment is on the same plane as your power system. The resulting shock of firing and the piston slamming into the cylinder head transfers that to the hop unit and slowly turns off your hop-up. It is the exact same problem M4 geared hopup units have. Hence why the TDC mod is a practical requirement for VSRs, or using the AA chamber which functions like a TDC.
So is there any mod that i can do to my stock chamber, so the hop up arm dont go backward and the hop can be bore constant ?
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Old 10-06-2016, 04:24 PM   #9
bmr3   bmr3 is offline
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Originally Posted by Devsniper View Post
So is there any mod that i can do to my stock chamber, so the hop up arm dont go backward and the hop can be bore constant ?


Yep, a standard TDC mod will serve you well. But if you do the TDC mod, make sure you have a metal hop arm. I have read that the stock plastic arms can get damaged by the screw from the TDC mod.

Or you could opt for the Action Army chamber, it has an internal TDC mod, plus it will give you the added benefit of a 100% air seal with minimal effort. If you have to buy a metal hop arm, I recommend saving your money and just get he AA chamber.


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Old 10-06-2016, 05:08 PM   #10
 
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As what bmr3 said. You can do the TDC mod, or buy the AA chamber. Personally, while you can save cash with doing the DIY mods, if you are not precise with it, it will show in your shots. Your best bet is to just bite the bullet and get the AA chamber.
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Old 10-06-2016, 08:21 PM   #11
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I agree getting the AA chamber and save cash for long run.

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Old 10-07-2016, 07:08 AM   #12
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If you can affor get aa chamber, but if you like me can't afford aa chamber just get maple leaf cnc arm along with new autobot or decepticon bucking and do tdc mod on your stock chamber, in this configuration you will have consistent hop and good airseal due to anti blowby ring that comes with autobot or decepticon and just do dental floss mod along teflon tape on the other side of bucking.
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