alright im pissed

[falcon 47]

ive had a b2k4 for a while ive done quite a few mods heres everything ive done to the marker

milled bolt (back piece is flush with the body when aired)
custom steel pin
no spring in ram ,single bumper between hammer and ram housing
high flow ram housing (cut 2 long holes kinda connecting two small holes on the housing 2 in front and 2 in back)
polished shaft and hammer
filled ram cap ( uses less air = more efficient)
led mod
lighter valve spring
some other small stuff

i lube every moving part
regs with dow33
ram with slick and a bit of dow
hammer with a thin film of slick
and the bolt with a drop of markr oil so the ano doesn't rub off on the bolt

upgrades
ck2 grips,ndz on/off, cprail, miniguage
old torp reg with a delrun piston

ok so heres my main problem i can't get it to shoot faster than like 240 well i can but it starts quacking, sounds to me like it lets way too much air out,
the manual says 180-220 inline and 85-95 lpr i run 850 input, 240-250 inline and probably like 50 psi lpr about third-half of a turn after the noid gets air any more and it starts quacking like crazy. i called icd and the guy said inline is 280-300 which is wierd cause my friends manual says 180-220 too
so im confused as hell right now but i had it running at 300 before and i got it to 250 fps quaking a little i went thru a bag today trying to get it to shoot faster but had little luck

i hate this thing and i love it at the same time
other than that velocity issue everything is great no fsdo, efficincy isn't horrible, with good paint its as consistent as shockers, protos, timmies i personally compared it to those markers so im not just sain that, one time playin i put 15 rounds on a 4 inch pole about 100 feet away hit it ten times kid with a pm5 shot 50 hit 5 with same paint, eyes slow it down a lot though to like 8bps don't really get why but i rarely have them on im really slow but sometimes i get up to 16 a sec it never chops unless i do somethin stupid

i would appriciate any suggestions

[lotus_esprit5]

if your inline is at 250 and your lpr is at 50 then im not surprised you would get low velocity. I think your regs are simply unbalanced. if the LPR is really low while the inline is quite a bit higher then there is not enough force to fully open the valve. try putting your inline at say 220 for starters, then set your LPR by turning it down till the gun uncocks, then turn in till the noid gets air again and go another half turn (or a little more if you want). This will set it a bit higher than what you currently have it at, while the inline is lower. hope it works for you :tup:

btw thats a good list of homemade mods, I've been curious about the one with lowering the volume of air in the ram cap but havent done it. big difference?

[falcon 47]

so whats it suppose to run at 180-220 or 280 -300 im really confused

if it was as simple as just adjusting the regs to turn up velocity i wouldn't be posting here
i usually run it at exactly 220 ill try to explain my problem in higher detail
ok if you air up the b2k with the lpr at 0psi turn it up slow itll leak then seal and teh bolt will move back give it like one tenth of a turn after that it should give a nice quick snap like a timmie or ego turnit up more and keep firing it will keep getting louder but will retain th nice pop sound then after a certain point third-half turn on the lpr from right before the noid leaks the sound changes turn it up more it gets worse it makes almost like a quaking noise and sounds like the valve stays open longer but the velocity does go up

the filling the cap makes no difference that i could see but it might give me like 10 extra shots

OMG OMG OMG Im going to watch pros play in a half hour ahhhh awesomeness

[falcon 47]

so what pressure is it supposed to run at 200 or 300

[lotus_esprit5]

it depends. a stock b2k4 runs between 250-275psi depending on how you want to set your regs. for yours, with those mods, i would say 220-225psi would be a more appropriate setting. set it at 220-225, set the LPR using the correct method (except maybe set it a little on the high side), see how it shoots. if it still isnt shooting fast enough, see if the valve is crooked. it might have shifted a little bit. personally i dont think thats it, but it can cause low velocity and its easy to check so you might as well.

[falcon 47]

i want this thing to run at least at 270 and i can easily i just turn the lpr up higher the only problem with that is b2k gets a lot more kick it get louder and lets a crap load of air out
i noticed that the valve stem sticks out only an eight of an inch so the only way to increase velocity is to have it open fully by having the hammer smack the valve whick is what might be causing the quacking sound or increase inline a lot
so i increased the inline and lpr cause lpr pressure goes down as inline goes but thanks to the retarted reg design, anyway i put the inline to 280ish it looked like it went up some not a whole lot probably like 250-260fps
ill mess with it some more today

what are your settings lotus

[lotus_esprit5]

yep, turning up the inline is the best way to make larger (greater than 5fps) changes in velocity. however, just be aware that at a point, you need to turn the LPR up as well to compensate, because the higher the inline, the harder it is for the hammer to open the valve. You probably understand that, I just wasnt quite sure from your last post whether you do or not.

My inline setting is around 215. I have a Vapor valve, lightened valve spring, ported and polished ram, and an old Wetworx bolt (went out of production many years ago but works great). I have a lightened hammer so thats why it isnt under 200psi, plus like you I prefer a slightly lower LPR pressure to minimize kick.

actually, just thought of something else. the valve spring might be too light. If the valve spring was one of the first mods you did to the gun (it is one of the easiest to do after all), the lightness of the spring would be ok because the inlien pressure would still be high enough to close the valve quickly. but then you did the other mods, which allow you to run even lower pressure, and now the spring might be too light to close the valve effectively, and the inline pressure is too low to compensate. makes sense to me in theory. put the stock valve spring back in and see how that works for you. it should allow you to turn the LPR up higher without running into problems.

[falcon 47]

ok i played today and messed with it some more and disided to quit messing with it i got it to around 250fps and im just gonna leave it there

yes lotus i understand how the valve thing works im no noob i make my own parts, do mods, fix markers and hopefully become an airsmith after im 18 as much as i know this gun just confuses me

this is on icd "A pressure gauge has been installed into the regulator body to indicate the exact operating pressure of the marker. This gauge is extremely useful. At the factory we set the regulator gauge to 225-275 PSI with an input pressure of 400 PSI using Compressed air as the base propellant. Under normal circumstances these settings will produce paintball velocities at approximately 280-300 fps. The input pressure from your tank should be set at 350-500 PSI. Higher input pressures will not provide increased performance."

manual says 180-220 site says 225-275 icd tech said 300 this kinda pisses me off

" This gun was designed with safety and safety standards in mind. If you attempt to shoot paintballs higher than established safety standards, the gun will not function properly. Note 1. You may notice that if you attempt to operate the gun at extremely high velocities, the internals will not function properly."

so i understand how it prevents the b2k from goin over 300 the valve stem sticks out an eight of an inch preventing the valve from being open anymore then an eight so velocity is adjusted by how long the valve stays open which is kinda retarted to me bacause the hammer just smacks the valve really hard at the pressuer they tell to set the marker at
i tried to adjust the inline but it makes little difference just makes it louder and get more blowback , velocity changed like 15fps between 200 and 300 psi
right now its at 275ish and lpr is at third of a turn in after the bolt cockes
so retarted quaking noise i hear is the valve staying open
i tried the turn until at 125 psi the turn back half which should be 90 velocity goes up a lot but the gun becomes very retarted i guess everyone runs it like that so noone had an idea of what i was talking about earlier because your used to running it like that
springs make no difference unless your running your lpr under like 40 psi and inline under 220 i used to run the b2k very low like 200-180 fps and my lpr was at like 30 i had it set up really wierd and it had no kick less kick then it running at 10 psi cause i was playing on a tiny crappy hyperball field so velocity wasn't an issue back then

i might look into a valve or just make a longer stem for it and see if it works but ill probably try to sell it and im saving up money now for something perfect that won't give me any problems currently looking into a 3rd gen 04 borg
thanks for the help lotus

[bTwOkOwNeR]

ill buy it from you for 66 dollars paypal?!?! lmk

[falcon 47]

350$

[vector911]

take your ram out and clean off all the grease off the ram shaft. Now take some synthetic PB oil and toss some on and work the shaft 30 times or so to clean off the old grease. Let it drip clean for an hour or so and put it back in the marker. Typically ppl that use grease on a ram shaft will notice their fps drop and become erratic after about half a case or so due to grease gumming up and becoming like glue.
after you shoot a tank of air with just oil, stick with useing a gel, or by mixing some of your slick with some syn pb oil together.

I used slick honey on my b2k's ram once for fun and it gummed up into a white sticky stuff in under 1000 rounds, dropping my fps to 220...

general rule when lubeing:
if it moves fast and over a long distance (ram) use thinner lube. If it is just a sealing surface o-ring or a small movement seal use grease (regs)

typical things for low velocity:
poor paint to barrel match
low dwell
regs not adjusted properly and no ram guage for LPR setting.
gummy ram shaft

[falcon 47]

thanks vector but thats not it my ram is so smooth that when taken out of the body with the hammer down it slides down flip it over and the hammer will slide back in it only sticks in colder temp
im getting kinda paranoid about the velocity thing ill need to chrony it to see what im really shooting at

and your suppossed to use grease in the ram not oil

[falcon 47]

can someone give me step by step directions for getting vids and pics up
i know im supposed to upload them to a free hosting site or something

yes im computer retarted

[ViperXT]

Go to www.photobucket.com and sign up for a free account, that should get you started.

This should explain things: http://photobucket.com/tutorials/

[falcon 47]

thanks man

[ViperXT]

No trouble at all, good luck:)

[falcon 47]

i was definatly paranoid about the velocity thing
i played on sunday and the first few shots were over 300fps
after turning it down this thing was shootin so nice as much kick as an ego which is next to none, silent it was shootin quiter than dms on the field with good paint it was pretty consisitent but most of my paint wasn't too great
its funny when a 300 dollar marker performs similarly to 1500 dollar markers
i was lovin it that day no eyes = no problem 15 bps no chops no breaks ever
ill get some pics and vids later when i finish making some more mods if anyones interested

[ViperXT]

Good to hear. I was gonna say I've got a lightweight hammer and I had to work my pressures a bit but I now have no trouble finding that sweet spot.

[falcon 47]

uhh i really wish i didn't have a b2k or that i would just stop messing with it

broke my valve and lost my lpr yay:mad: I was usin parts from my freinds b2k
(hes got a nerve) and now he wants it back
so now the money i was savin up to buy somethin new is gonna go towards the b2k

I find it amazing how well a stock tuned b2k works compared to a modded one theres such little difference in performance which really makes me wander to why i did all these mods and plan on doing another 20 and thats also the reason why my valve is broken and my lpr is god knows where:|

so you got a light weight hammer .. vaporworks?
im makin a delrin one not sure why... I think I have stockophobia or tinkerers disease

[falcon 47]

I decided to sell it my b2k4 (http://www.pbreview.com/forums/showthread.php?p=3587657&posted=1#post3587657) <----click it

I think its good that im selling it cause i have a feeling that if i don't I wont have a gun left