Problems with a B2K4

[Little_Ho]

Hi Guys,
i know it is not Automag releated but i need help.

A Friend of mine have a Bushmaster B2K4 std. The problem is, we can not get it to shoot over 178fps. I tried everything to adjust the Velocity.

So i turn the Pressure up to around 550Psi on the Gauge and still not firering over 178fps.
There is an screw in the Front but i can not screw this one in or out. Its tight. SO what can i do??

The Setup i use to check:
B2K4 std
Crossfire 68/4500 HP(825psi output)
Any available Loader. I dont need to fire quick because we just need a few shoots to check the Velocity.

Please need help.

Thanks

[Duzzy]

I don't know about newer Bushies, but you might want to think about having possibly blown your LPR. My old one had a neat feature where the LPR would stop working to keep high pressures from damaging it. I would get in contact with ICD in all honesty. It will make life much simpler.

[phelix]

tried flipping the bolt over?

[urbansix]

I would take this one to Tank's ICDog forums - Tank knows all

If the LPR screw (the one in the front) won't budge something is wrong - adjusting the LPR is critical to tuning the B2k. Did he get it used? Or would it be under warranty still? If it is, call up ICD - their response usually is to send it in.

[phelix]

as i said, the problem is probably that the bolt is upside down. Pull out the bolt and make sure the air hole is facing down.

[Chronobreak]

there is an hpr and an lpr..

the hpr(foregrip) should be around 225 psi

the one under the barrel(lpr) should be at 90~ and thats the thing to adj the vel

500 ! is wayyyyyyyyyyyy to much psi for it

[phelix]

I still bet the bolt's upside down

[phelix]

there is an hpr and an lpr..

the hpr(foregrip) should be around 225 psi

the one under the barrel(lpr) should be at 90~ and thats the thing to adj the vel

500 ! is wayyyyyyyyyyyy to much psi for it

There's different ways of looking at it - technically the lpr controls only the bolt movement, and the hpr should be used to adjust the velocity. However, the lpr can change how hard the hammer hits the valve, so it can make slight adjustments. People usually see it as there being a balance between the 2 regs. If he's running 500psi, and the bolt's right side up, he wouldnt be shooting 150 no matter where his lpr is (unless it's actually too low to open the valve). And once again, the very first thing to check, before even checking your regulators, is whether the bolt is right side up or not.

[Duzzy]

There's different ways of looking at it - technically the lpr controls only the bolt movement, and the hpr should be used to adjust the velocity. However, the lpr can change how hard the hammer hits the valve, so it can make slight adjustments. People usually see it as there being a balance between the 2 regs. If he's running 500psi, and the bolt's right side up, he wouldnt be shooting 150 no matter where his lpr is (unless it's actually too low to open the valve). And once again, the very first thing to check, before even checking your regulators, is whether the bolt is right side up or not.

Didn't even cross my mind but I have to go with him on this one.

[Little_Ho]

Hi Gys,

thanks for your Feedback so far.
I adjust the HPReg to around 200-225psi.
And the Marker starts leaking from the Trigger. The Manual sais that because the LPR is over 125psi. The next step would be to adjust the LPR. But i can not turn the Screw up front. No matter what i try and dont forget it is a new Gun. I guess he have to send it in to let check it out. I wrote a Mail to the Support and i will see what they say as well. I will post the answer here on the Board.

Urbansix:

I checked out the Board and all what i figure out was, that i have to adjust the LPR/Velocity on the Screw up front. But i can not turn this one. It looks like tha Screw is tide in to it. I can see a little bit off the Thread but i can not turn it.
I will see.

Thanks so far to everyone

[phelix]

DUDE! Have you checked if your bolt is right side up?

[Little_Ho]

Hi
The bolt is correct in. Well that was the first thing i checked. The first Maker i owned was an A/C so i had some trouble to begin with one was the Bolt was upside down.

So the Bolt is in correct. I was just shooting it with V-Balls. With my Mag setup to 280fps and V-Balls i have a Velocity reading from 180fps (WITH V-BALLS)

With the 2004 B2K i have a reading WITH V-BALLS from around 157fps.

I think that tha V-Balls take around 100fps down but not sure. And i can not shoot Paint inside.
Anyway i dont have Paint anymore here.

If this is the true that i loose 100fps with the V-Balls the Gun should shoot around 250-260fps with Paintballs.

But dont know i think i will go to my local store and try it with Paint.

But i will let you know


Thanks so far

[SOAD8789]

if it is leaking aroud the trigger frame, then either your LPR is set too high, or your solenoid is loose (that was a problem with my bko)