FPS Problems

Subject: FPS Problems Thu Mar 06, 2008 11:08 am

Hey guys I just had a quick question. I have a Mad Bull M140 in my gun but it is only shooting 415 FPS. Could it be a compression problem? I will list all the other internal parts so you might be able to see the problem. (Please note that everything was professionally installed.)
Mad Bull Ver. 2 Tight Bore
Steel Bushings
Systema Torque Up Gears
Aluminum Piston Head W/Bearings
G&P White Polycarb Piston
Metal Ver. 2 Spring Guide W/Bearings
9.6V 4400mah NiMH
Mad Bull M140 Spring
Systema Hop Up Bucking

Thanks for your help.
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The (not so) Lone Fox is Out

Hey got a question just throw me a PM (unless it is about the Bar 10 ...that word makes me shiver)

Subject: Re: FPS Problems Thu Mar 06, 2008 3:03 pm

i dont know too much especially compared to seabass....but have you gone to a longer barrel? if so, you may need a bore up kit to prevent suction of the BB as it is in the longer portion of the barrel, which in turn would slow your fps down a lot....but that said, it would need to be a decent amount longer i would think to make much difference.

Also, if the air nozzle isnt fully sealing or something....that could be it....just trying to help

l8r
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Subject: Re: FPS Problems Thu Mar 06, 2008 3:49 pm

I had a similar problem with my Echo 1 M14... had an M140 in it for a while and didnt notice much of an FPS gain, then I put in an M150 and it still didnt shoot much over 400 fps. My guess is that you have either a damaged air nozzle or it is possible that the spring sat compressed for a while and made it slightly weaker than it should be. There are other possibilities, but those are pretty regular problems people experience.
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Classic Army MG36 - 2500 rounds of pure fury.
Echo 1 Vector Arms AK - 400 FPS
JG Bar 10 G-Spec - 520 FPS
ICS M4 CQB - 325 FPS (Perfect for close encounters)

Subject: Re: FPS Problems Thu Mar 06, 2008 6:41 pm

Thanks for the help guys. I know it isn't barrel length so I will try a new air nozzle.
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The (not so) Lone Fox is Out

Hey got a question just throw me a PM (unless it is about the Bar 10 ...that word makes me shiver)

Subject: Re: FPS Problems Thu Mar 06, 2008 6:50 pm

If that doesnt work... maybe try a new o - ring around your piston and re-lube the cylinder itself to make sure you are getting full compression from your piston.
_________________
Classic Army MG36 - 2500 rounds of pure fury.
Echo 1 Vector Arms AK - 400 FPS
JG Bar 10 G-Spec - 520 FPS
ICS M4 CQB - 325 FPS (Perfect for close encounters)

Subject: Re: FPS Problems Thu Mar 06, 2008 8:36 pm

Hey I just tried shooting a Coke can and(poor mans chrono here: http: //airsoftforum.darkbb.com/general-airsoft-discussion-f3/poor-man-s-chrono-t38.htm ) it penetrated the sides (duh), the bottom anywere, and the top sides. If I shoot in the top center it rips the aluminum so I can see in but the BB won't go through. Do you think that mabey the chrono at the place isn't working properly?
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The (not so) Lone Fox is Out

Hey got a question just throw me a PM (unless it is about the Bar 10 ...that word makes me shiver)

Subject: Re: FPS Problems Thu Mar 06, 2008 9:36 pm

Well it is possible that the chrono may have been wrong... or maybe the battery was low or something.

I guess the best thing you could do is shoot it and see if the range is good... if so then dont really worry about it. Smile

_________________
Classic Army MG36 - 2500 rounds of pure fury.
Echo 1 Vector Arms AK - 400 FPS
JG Bar 10 G-Spec - 520 FPS
ICS M4 CQB - 325 FPS (Perfect for close encounters)

Subject: Re: FPS Problems Thu Mar 06, 2008 9:39 pm

I guess this may be a dumb sounding question... and I am sorry if it sounds like I am doubting your airsoft knowledge, but are you sure you were shooting .20's over the Chrono?? It would have a drastic effect if you were using .23's, .25's, etc...

Just thought about this a second after I posted the last message.
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Classic Army MG36 - 2500 rounds of pure fury.
Echo 1 Vector Arms AK - 400 FPS
JG Bar 10 G-Spec - 520 FPS
ICS M4 CQB - 325 FPS (Perfect for close encounters)

Subject: Re: FPS Problems Thu Mar 06, 2008 9:48 pm

I don't know what they used. But for the pop can I used .2's. And my effective range is 185 ft. (yes I measured and yes it took a long time)
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The (not so) Lone Fox is Out

Hey got a question just throw me a PM (unless it is about the Bar 10 ...that word makes me shiver)

Captain Age : 13 Joined : 21 May 2008 Posts : 417

I like using .2 bb's they get good accuracy and are pretty cheap too .

Subject: Re: FPS Problems Thu Jun 05, 2008 11:24 am

i would check to make sure everything is sealing properly.

unfortunately ive noticed that alot of people are having a very hard time upgrading their E1's or JG guns over 400. i first noticed with seabass then on Arnies and now you are the second person to some to this forum with this issue. IDK maybe the mechbox is warped a little. not too much because then it wouldent work but a minor warp would make it loose some considerable compression.

if you buy a bore up kit you should be getting the FPS that you want with your current spring. i would take it down to a M120-M130 if you do buy a bore up.

good luck

sticks
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