Hey, I looked around and couldnt find a thread that talked about exactly whats wrong with my marker. When aired up, with no paint, it shoots fine and has no drop off. But after i load the hopper, the paint shoots but goes nowhere. I tried adjusting the HPR and LPR but im not sure on the settings. Anyone know them? I have a high pressure compressed air tank too. Thanks for the help. Ill try any suggestions.
Oh and i havent used the marker in a while. Just got it out the other day to see if it worked before i go to play.
If I'm not mistaken the HPR needs to be set to 325psi. Turn your LPR all the way in then back out while gassed up and shooting it. When the bolt stays all the way back go 1/2 turn more. Adjust the HPR to set the FPS from there. You should be 270/280.
I have 4 b2ks and never set the hpr past 275 psi - If it has a valve and other internal mods they usually run closer to 200.
I found this in a very old post by shootpaint and saved it to a file.....
Quote:
The Bushy's LPR should only be used to make extremely fine adjustments to the FPS. Roughly 5fps changes. All other adjustment should come from the HPR.
The best settings I have found for the B2K4's are around 250-275psi with stock valve and 225-250psi with aftermarket valve.
Set your HPR to the above level depending on what type of valve you have.
Now that we have the HPR covered lets move onto the LPR. There are a couple of different versions of adjustment for the LPR. There is the minimum operating pressure adjustment and the maximum operating pressure adjustment proceedure. I do a little of both since there are advantages to each one.
Minimum LPR pressure adjustment procedure
Start with your LPR adjustment knob turned out far enough the marker will not cock when gassed up.
With the marker gassed up turn the LPR knob clockwise until your bolt if fully cocked. Once the bolt is fully cocked go a half turn more.
This proceedure will set the LPR to run at its minimum pressure. It allows the marker to be easier on paint but usually leaves the consistantcy of the marker a little wider than other methods. You should see + or - 5-7FPS from shot to shot with this adjustment proceedure.
Maximum Pressure adjustment procedure
Start with your LPR adjustment knob turned out far enough the marker will not cock when gassed up.
With the marker gassed up turn the LPR knob clockwise until you hear the marker vent gas from the gripframe. Once you hear the venting gas slowly turn the LPR knob counter clockwise, while cycling the marker, until the gas no longer vents.
This proceedure will set the LPR to run at its maximum pressure. It is harder on paint but allows the ram assembly to cycle slightly quicker, it is usually a little more consistant. You will see 3-5fps change from shot to shot with this proceedure.
Once you have your LPR adjusted you can use your HPR to dial in your FPS. This is the basics of how to adjust your regs.
How I adjust my regs
I set my HPR as described above, depending on the valve.
I next adjust my LPR until the marker cycles. Once the marker cycles I goto a chrono and adjust the HPR to reach my desired FPS.
As the HPR is increased I usually have to raise the LPR just slightly to allow for the valve to open properly. Once I get the marker cycling at the desired FPS I adjust the LPR until I see my FPS drop. When my FPS drops I back out the LPR until I see the FPS increase. When the FPS increases I back the HPR off about 5-10 psi to get back to my originally desired FPS.
This proceedure is what I use on my personal markers and I have been able to keep them at + or - 1-2 fps and even had one marker that ran + or - .5fps by using this proceedure.
One thing I recommend that I am sure some people will disagree with me on is the lubing of your regs. I dont recommend your regs be lubed after every day of play. I personally dont lube my regs on my markers after every day of play. I usually lube them about every 7-10 cases of paint or when I see consistancy issues, which is usually every 7-10 cases of paint. I am a firm believer in the theory, "If its not broke dont fix it!!!" I honestly believe a lot of the issues people have with their markers is self induced do to to much cleaning and lubing, but to each there own.
Wow! I haven't talked to Travis in a couple of years. His post rings some bells. The 275psi is the correct pressure. Due to issues with with players not understanding the concept of the LPR we used to set the HPR high, balance the LPR then drop the the HPR to bring the velocity to 280.
It's been a few years since I shot B2K's.
I have a stock Delrin Bolt is anyone needs it. Just PM me.
wow, im pretty sure mine was in upside down <.< im going to check it now
edit: yea it was the bolt lol it just shot fine. I guess i put it in backwards when i was messing with it. Thanks. Oh but the settings were low too so you all helped
