Jump to content


Springs


  • Please log in to reply
14 replies to this topic

#1 toxtreme

toxtreme

    Newbie

  • Members
  • Pip
  • 12 posts
  • Gender:Male
  • Location:Illinois
  • Interests:Airsoft, Paintball, Small Bore Silohette Comp, Lacrosse, Hockey, Football, Outdoors
  • Country:

Posted 17 February 2014 - 01:13 PM

What is the stock size of the SR7 Devgru spring? and is it a better spring than a Matrix M115 spring? I put a 363mm TB barrel in the SR7, kinda wanted a bit longer barrel to cover both CQB and field play and a free float 10" to butt up against the [barrel extension] that covers the extra 4" of barrel, any way I was looking at the Matrix M115 thinking it may help out with the FPS after adding the extra 4", just looking for some help, old in the paintball world, new in the airsoft,  thanks

#2 tales

tales

    Specialist

  • Members
  • PipPipPip
  • 501 posts
  • Gender:Male
  • Location:Brooklyn NY
  • Interests:Fishing, RC cars, Building Motion Picture sets
  • Country:

Posted 17 February 2014 - 02:12 PM

Welcome!
The stock spring is a KWA M120

Box stock SR7: KWA M120 spring: 309fps with .25s = 345fps w/.20s
Posted Image

SR7: KWA M130 spring: 330fps w/ .25s = 370fps w/ .20s too hot for CQB
Posted Image

SR7: 6.02 355mm TBB, KWA M120 spring
Posted Image

KWA M120 spring: Slight increase in FPS with the longer 6.02 TBB.  316fps w/ .25s = 353fps w/ .20s good for CQB
Posted Image

Rough conversion

Edited by tales, 17 February 2014 - 02:15 PM.


#3 toxtreme

toxtreme

    Newbie

  • Members
  • Pip
  • 12 posts
  • Gender:Male
  • Location:Illinois
  • Interests:Airsoft, Paintball, Small Bore Silohette Comp, Lacrosse, Hockey, Football, Outdoors
  • Country:

Posted 17 February 2014 - 02:36 PM

so should I just leave the stock spring in or look at changing it to the Matrix 115?

#4 iwamofo

iwamofo

    Newbie

  • Members
  • Pip
  • 28 posts
  • Gender:Male
  • Location:New York
  • Country:

Posted 17 February 2014 - 02:59 PM

You said you wanted to play both CQB and field, but most CQB fields only allow the FPS to be 350 and under with .20g bbs.  Changing the spring to a m115 may increase the fps because kwa springs are equivalent to a m110 but that would put you over the 350fps limit.  So, if you want to be changing your spring every time you go to the different field, then go for a spring change.  If you just want an overall greater fps, I would just change your cylinder to a kwa type .5 which would get you around 395 fps with your stock spring.  And never buy any matrix products.  They are complete crap.

Forgot to mention that the increase in fps won't get you much of a difference in range.  FPS does in fact help with range but when you get to around the 300 fps range, you won't see much of a difference.  A cheap way to increase range is to get an rhop.  It will increase your range around 50 feet, more if you install it better.

Edited by iwamofo, 17 February 2014 - 04:51 PM.


#5 tales

tales

    Specialist

  • Members
  • PipPipPip
  • 501 posts
  • Gender:Male
  • Location:Brooklyn NY
  • Interests:Fishing, RC cars, Building Motion Picture sets
  • Country:

Posted 17 February 2014 - 03:47 PM

View Posttoxtreme, on 17 February 2014 - 02:36 PM, said:

so should I just leave the stock spring in or look at changing it to the Matrix 115?

No, what is your FPS goal. As stated 350fps w/ .20s is the limit in most CQB arenas.

IMO, if you want a hotter spring then KWA offers. Try Guarder or Madbull

#6 vanevery

vanevery

    Specialist

  • Members
  • PipPipPip
  • 981 posts
  • Gender:Male
  • Country:

Posted 17 February 2014 - 04:26 PM

Avoid Matrix springs.
Quality control is horrible.
There is no telling what spring you may actually get.

#7 toxtreme

toxtreme

    Newbie

  • Members
  • Pip
  • 12 posts
  • Gender:Male
  • Location:Illinois
  • Interests:Airsoft, Paintball, Small Bore Silohette Comp, Lacrosse, Hockey, Football, Outdoors
  • Country:

Posted 17 February 2014 - 04:46 PM

Copy that, thanks for the help, I'm out of town and will check my FPS this weekend, I thought it was shooting over 400 with 20's but I'll have to check.

* Checked the FPS and it was shooting 20's around 420 & 25's around 370 with the Matrix M115

Edited by toxtreme, 24 February 2014 - 04:08 PM.


#8 toxtreme

toxtreme

    Newbie

  • Members
  • Pip
  • 12 posts
  • Gender:Male
  • Location:Illinois
  • Interests:Airsoft, Paintball, Small Bore Silohette Comp, Lacrosse, Hockey, Football, Outdoors
  • Country:

Posted 24 February 2014 - 04:04 PM

So I put a new:
Guarder Super Lucid cylinder, says its for an SR16
Guarder High Precision Oil Tampered Nozzle
Lonex Cylinder head
Lonex Poly (blue) 10 teeth standard piston
Lonex piston head POM
and shimmed the gear box with G&P shim, anyway it shoots average 20bps and 285fps shooting .25's with OEM spring, does this seem about right for a SR7 spring? I also installed a 363 TBB about a month ago. I'm trying to get a somewhat balance gun fps-bps, The fps seemed a bit low to me, I'd like to get the fps to around 320-330 so it'd shoot .20's around the indoor field limit of 350fps, any and all help would be great.

*** I found a calc for spring M to FPS 3.281 x the M#, it would equal 360fps, so I'm shooting about 80fps low considering the calc is correct, do you think it could be the cylinder? It said "for SR16" on box when I recieved it, nothing in description when I bought it from EVIKE. your thoughts?

Edited by toxtreme, 24 February 2014 - 04:13 PM.


#9 tales

tales

    Specialist

  • Members
  • PipPipPip
  • 501 posts
  • Gender:Male
  • Location:Brooklyn NY
  • Interests:Fishing, RC cars, Building Motion Picture sets
  • Country:

Posted 24 February 2014 - 04:14 PM

View Posttoxtreme, on 24 February 2014 - 04:04 PM, said:

So I put a new:
Guarder Super Lucid cylinder, says its for an SR16
Guarder High Precision Oil Tampered Nozzle
Lonex Cylinder head
Lonex Poly (blue) 10 teeth standard piston
Lonex piston head POM
and shimmed the gear box with G&P shim, anyway it shoots average 20bps and 285fps shooting .25's with OEM spring, does this seem about right for a SR7 spring? I also installed a 363 TBB about a month ago. I'm trying to get a somewhat balance gun fps-bps, The fps seemed a bit low to me, I'd like to get the fps to around 320-330 so it'd shoot .20's around the indoor field limit of 350fps, any and all help would be great.

I suggest you go back to KWAs Cylinder head & air nozzle, see if that gets the FPS up

#10 Larry

Larry

    Enthusiast

  • Members
  • PipPip
  • 111 posts
  • Gender:Male
  • Location:Atlanta
  • Country:

Posted 24 February 2014 - 04:29 PM

On the subject of springs. My SR10 after 2 months is still shooting 415 with .20s.  Need to lower it under 400. Dont know what spring comes in it (tried to track in the parts list but they list 3 springs).  Reading posts think it comes with a 120. People where I play have installed a guarger 110 and say will do 420?   Should I just go into it and add a pad on the pistion and correct AOE and hope to drop fps or install 100 spring. Maybe a 110 with a piston pad and aoe adjustment. Guess I would like to know what spring comes in the gun.

Edited by Larry, 24 February 2014 - 04:35 PM.


#11 tales

tales

    Specialist

  • Members
  • PipPipPip
  • 501 posts
  • Gender:Male
  • Location:Brooklyn NY
  • Interests:Fishing, RC cars, Building Motion Picture sets
  • Country:

Posted 24 February 2014 - 07:46 PM

View PostLarry, on 24 February 2014 - 04:29 PM, said:

On the subject of springs. My SR10 after 2 months is still shooting 415 with .20s.  Need to lower it under 400. Dont know what spring comes in it (tried to track in the parts list but they list 3 springs).  Reading posts think it comes with a 120. People where I play have installed a guarger 110 and say will do 420?   Should I just go into it and add a pad on the pistion and correct AOE and hope to drop fps or install 100 spring. Maybe a 110 with a piston pad and aoe adjustment. Guess I would like to know what spring comes in the gun.

I think its a M120. did you change the barrel? Aftermarket springs can shoot hotter then KWA springs. Maybe a SP100 will be the solution.

#12 vanevery

vanevery

    Specialist

  • Members
  • PipPipPip
  • 981 posts
  • Gender:Male
  • Country:

Posted 24 February 2014 - 08:34 PM

View PostLarry, on 24 February 2014 - 04:29 PM, said:

On the subject of springs. My SR10 after 2 months is still shooting 415 with .20s.  Need to lower it under 400. Dont know what spring comes in it (tried to track in the parts list but they list 3 springs).  Reading posts think it comes with a 120. People where I play have installed a guarger 110 and say will do 420?   Should I just go into it and add a pad on the pistion and correct AOE and hope to drop fps or install 100 spring. Maybe a 110 with a piston pad and aoe adjustment. Guess I would like to know what spring comes in the gun.
Is your chrono reading with the hop-up all the way off, set for no Hop?
If so, chrono with your gun's hop set for level flight.
That should easily get you under 400fps.

Edited by vanevery, 24 February 2014 - 08:35 PM.


#13 Larry

Larry

    Enthusiast

  • Members
  • PipPip
  • 111 posts
  • Gender:Male
  • Location:Atlanta
  • Country:

Posted 25 February 2014 - 09:19 AM

Chrono 415 hop up off, then adjusted it to overhop .28s ( have a G&G flat hop mod in it) had it tested again, dropped to 410  :(  .  Guess I could turn it way up and try again.  Gun it stock besides the hop up bucking and nub, gun about 8 weeks old.  Seemed to pick up fps with the G&G install. Didn't chrono gun before that.  Gun shoots great, was hoping to just go into the gear box one time and get it lowered a bit, without doing to much. He checked my other guns, they are consistant with other places I have them checked at (within 5 fps, 340 one, other two 375) so I trust his chrono. I was thinking sp100 also,  or the pistion pad 1/8" thick with AOE correction (any guess how much it would drop with just a pad added to pistion) ?

Edited by Larry, 25 February 2014 - 09:33 AM.


#14 vanevery

vanevery

    Specialist

  • Members
  • PipPipPip
  • 981 posts
  • Gender:Male
  • Country:

Posted 25 February 2014 - 02:23 PM

View PostLarry, on 25 February 2014 - 09:19 AM, said:

Chrono 415 hop up off, then adjusted it to overhop .28s ( have a G&G flat hop mod in it) had it tested again, dropped to 410  :(  .  Guess I could turn it way up and try again.  Gun it stock besides the hop up bucking and nub, gun about 8 weeks old.  Seemed to pick up fps with the G&G install. Didn't chrono gun before that.  Gun shoots great, was hoping to just go into the gear box one time and get it lowered a bit, without doing to much. He checked my other guns, they are consistant with other places I have them checked at (within 5 fps, 340 one, other two 375) so I trust his chrono. I was thinking sp100 also,  or the pistion pad 1/8" thick with AOE correction (any guess how much it would drop with just a pad added to pistion) ?
Since your Hop-up Is Flat-hopped, do not raise the hop to try to lower fps. That can tear the Bucking. Is your Main Spring a KWA. Your fps seems a bit high for KWA m120 springs. Usually KWA m120 springs chrono at 405fps with Hop-up all the way off. Then, 390(ish) when adjusted for flight.

Edited by vanevery, 25 February 2014 - 02:25 PM.


#15 Larry

Larry

    Enthusiast

  • Members
  • PipPip
  • 111 posts
  • Gender:Male
  • Location:Atlanta
  • Country:

Posted 25 February 2014 - 04:15 PM

Everything is orig (factory) except for the bucking and nub. Shoots like a 120 Tales. I use the poor mans chrono at the house (I know I need to buy one). It went thru the cans better after the G&G install, fit a lot tighter than the 2GX. Think that's where I gained the extra. Thanks to your advise in other threads Vanevery (about the G&G), shoots long and tight. Was thinking pad on piston or 100\110 spring. Know it not a exact science but you guys have more experience than I, I'm sure. I know some springs are hotter than others ,  willing to try a suggestion to drop 15fps..

Edited by Larry, 25 February 2014 - 06:35 PM.





1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users