Jump to content


Best Way To Increase Fps? Npas Or Tbb Or Hope For A Upgrade Bolt?


  • Please log in to reply
43 replies to this topic

#1 Raptor72

Raptor72

    Enthusiast

  • Members
  • PipPip
  • 189 posts
  • Gender:Male
  • Location:Annapolis, MD
  • Country:

Posted 01 June 2012 - 06:42 AM

After shooting my WE SCAR for the last six months I am disappointed with the LM4s FPS.

#2 Tech-D

Tech-D

    Enthusiast

  • Members
  • PipPip
  • 34 posts
  • Gender:Male
  • Location:Sellersville, PA
  • Interests:Tae Kwon Do, Airsoft, Photography, Sportbikes
  • Country:

Posted 01 June 2012 - 09:00 AM

Follow the threads by BobieM4H he has been experimenting with different things and one of his videos has him shooting closer to 400.

http://kwausa.com/fo...?showtopic=8735

#3 Raptor72

Raptor72

    Enthusiast

  • Members
  • PipPip
  • 189 posts
  • Gender:Male
  • Location:Annapolis, MD
  • Country:

Posted 01 June 2012 - 09:15 AM

Yeah, I have been watching his youtube vids and following his posts.  I was just looking for a general consensus.  

Thanks for the reply.

#4 BoobieM4H

BoobieM4H

    Guru

  • Members
  • PipPipPipPip
  • 1,065 posts
  • Gender:Male
  • Location:SAN JOSE, CA
  • Interests:IF IT USES GREEN GAS..I MAKE IT SHOOT BETTER!
  • Country:

Posted 03 June 2012 - 12:29 PM

Ill be posting up a vid probably tomorrow evening..in that vid ill have the guarder 6.02 tbb and guarder hop up unit and a+ studios reaps bucking. I'm hoping for at least a consistant 400 fps or a lil more. Another option might be the ra-tech npas nozzle. I don't see to many ppl experimenting with that so I guess I will soon lol..I think the low fps has a lot to do with the rocket valve spring and the hop up bucking used..the bucking material is soo thin that I think a lot of blowby happens when propelling the bb. Just by changing my bucking to a ra-tech ksc m4 bucking it did bring me really close to 400fps. Sub to my channel as ill be posting some trial and error vids on my LM4.

#5 BoobieM4H

BoobieM4H

    Guru

  • Members
  • PipPipPipPip
  • 1,065 posts
  • Gender:Male
  • Location:SAN JOSE, CA
  • Interests:IF IT USES GREEN GAS..I MAKE IT SHOOT BETTER!
  • Country:

Posted 03 June 2012 - 08:34 PM



#6 Raptor72

Raptor72

    Enthusiast

  • Members
  • PipPip
  • 189 posts
  • Gender:Male
  • Location:Annapolis, MD
  • Country:

Posted 04 June 2012 - 07:17 AM

So you used a KJW and not a KSC valve(npas).

*EDIT*  Just noticed, is the KJW M4 npas kit the same as the KSC MP7?  It's around $20.

Edited by Raptor72, 04 June 2012 - 07:33 AM.


#7 BoobieM4H

BoobieM4H

    Guru

  • Members
  • PipPipPipPip
  • 1,065 posts
  • Gender:Male
  • Location:SAN JOSE, CA
  • Interests:IF IT USES GREEN GAS..I MAKE IT SHOOT BETTER!
  • Country:

Posted 04 June 2012 - 08:32 AM

Yup..kjw npas..not ksc..I had to shape the npas to look like the rocket valve using a dremel..check out the rest of mu videos from yesterday

#8 Raptor72

Raptor72

    Enthusiast

  • Members
  • PipPip
  • 189 posts
  • Gender:Male
  • Location:Annapolis, MD
  • Country:

Posted 04 June 2012 - 09:41 AM

I am still thinking about purchasing a RATech KSC nozzle and taking the npas out of it.  Was hoping to find just an KSC NPAS separately.

#9 BoobieM4H

BoobieM4H

    Guru

  • Members
  • PipPipPipPip
  • 1,065 posts
  • Gender:Male
  • Location:SAN JOSE, CA
  • Interests:IF IT USES GREEN GAS..I MAKE IT SHOOT BETTER!
  • Country:

Posted 04 June 2012 - 10:39 AM

Yea..I'm going to try that too..

#10 Raptor72

Raptor72

    Enthusiast

  • Members
  • PipPip
  • 189 posts
  • Gender:Male
  • Location:Annapolis, MD
  • Country:

Posted 04 June 2012 - 12:32 PM

No matter what its good results with the KJ.

#11 BoobieM4H

BoobieM4H

    Guru

  • Members
  • PipPipPipPip
  • 1,065 posts
  • Gender:Male
  • Location:SAN JOSE, CA
  • Interests:IF IT USES GREEN GAS..I MAKE IT SHOOT BETTER!
  • Country:

Posted 04 June 2012 - 08:56 PM

View PostRaptor72, on 04 June 2012 - 12:32 PM, said:

No matter what its good results with the KJ.
thanks!

#12 Raptor72

Raptor72

    Enthusiast

  • Members
  • PipPip
  • 189 posts
  • Gender:Male
  • Location:Annapolis, MD
  • Country:

Posted 05 June 2012 - 08:38 AM

Boobie,

One question I do have is, how has the increase in fps affect gas consumption.  Were you still able to get more than one mag dump in full auto?

#13 BoobieM4H

BoobieM4H

    Guru

  • Members
  • PipPipPipPip
  • 1,065 posts
  • Gender:Male
  • Location:SAN JOSE, CA
  • Interests:IF IT USES GREEN GAS..I MAKE IT SHOOT BETTER!
  • Country:

Posted 05 June 2012 - 04:43 PM

View PostRaptor72, on 05 June 2012 - 08:38 AM, said:

Boobie,

One question I do have is, how has the increase in fps affect gas consumption.  Were you still able to get more than one mag dump in full auto?
Gas consumption is about the same..no worries there

#14 Raptor72

Raptor72

    Enthusiast

  • Members
  • PipPip
  • 189 posts
  • Gender:Male
  • Location:Annapolis, MD
  • Country:

Posted 11 June 2012 - 06:52 AM

Hows the KJ NPAS holding up?  I cant seem to get definitive info on the KSC NPAS working in the KWA nozzle.  I understand that we cant discuss non ATF approved KSC guns on the forum but can we discuss parts?  such as the NPAS?  I was hoping Allizard would step in and answer a question I posted last week but no luck.  Is he able to discuss?

#15 BoobieM4H

BoobieM4H

    Guru

  • Members
  • PipPipPipPip
  • 1,065 posts
  • Gender:Male
  • Location:SAN JOSE, CA
  • Interests:IF IT USES GREEN GAS..I MAKE IT SHOOT BETTER!
  • Country:

Posted 11 June 2012 - 12:48 PM

The kjw npas is holding up fine and still have 440-450 fps..and adjustable down to 400 fps. I think I will be ordering the ksc part from ratech soon just to give it a try and see how it works

Sent from my DROID2 using Tapatalk 2

#16 Jatodude

Jatodude

    Enthusiast

  • Members
  • PipPip
  • 207 posts
  • Gender:Male
  • Location:Wisconsin
  • Country:

Posted 12 June 2012 - 12:46 PM

I'd be very interested in what'd happen with the RA Tech NPAS kit.  The US version of the LM4 has a slightly restricted air nozzle to reduce power.  So you'd probably see a dramatic FPS increase if you replaced the piston with the RA Tech NPAS. Allen has tried it, at least in the prototypes and it worked.  But he doesn't recommend it, not sure why.  It'll probably work fine, and boost the FPS to about 550 at maximum.
Check these out:


Skip to 2:00



#17 Raptor72

Raptor72

    Enthusiast

  • Members
  • PipPip
  • 189 posts
  • Gender:Male
  • Location:Annapolis, MD
  • Country:

Posted 12 June 2012 - 01:04 PM

Yeah, we've seen all the vids and discussed in detail.  I wish RATech would just sell the npas alone and not just in the KSC nozzle or entire BCG.  The nozzle is obviously different between the two, one having metal and the other not.  I hope that the inner dimensions of the nozzles are the same between KSC and KWA, that would make it a simple swap.

Edited by Raptor72, 12 June 2012 - 01:07 PM.


#18 Jatodude

Jatodude

    Enthusiast

  • Members
  • PipPip
  • 207 posts
  • Gender:Male
  • Location:Wisconsin
  • Country:

Posted 12 June 2012 - 01:30 PM

View PostRaptor72, on 12 June 2012 - 01:04 PM, said:

Yeah, we've seen all the vids and discussed in detail.  I wish RATech would just sell the npas alone and not just in the KSC nozzle or entire BCG.  The nozzle is obviously different between the two, one having metal and the other not.  I hope that the inner dimensions of the nozzles are the same between KSC and KWA, that would make it a simple swap.
You want to put the NPAS inside the original piston?

#19 Raptor72

Raptor72

    Enthusiast

  • Members
  • PipPip
  • 189 posts
  • Gender:Male
  • Location:Annapolis, MD
  • Country:

Posted 12 June 2012 - 02:14 PM

View PostJatodude, on 12 June 2012 - 01:30 PM, said:

You want to put the NPAS inside the original piston?

Of course.  The KWA nozzle is plastic AND metal where as the KSC is all plastic.  The KWA has the better nozzle in my opinion that is why I want to install the RATech NPAS valve in the KWA nozzle.  If you look above BoobieM4H has installed a KJW NPAS valve in the KWA nozzle with great results.  It is not hard to remove the nozzle from the bolt nor is it difficult to disassemble the nozzle to get to the rocket vavle/NPAS.

#20 Jatodude

Jatodude

    Enthusiast

  • Members
  • PipPip
  • 207 posts
  • Gender:Male
  • Location:Wisconsin
  • Country:

Posted 12 June 2012 - 02:41 PM

View PostRaptor72, on 12 June 2012 - 02:14 PM, said:


Of course.  The KWA nozzle is plastic AND metal where as the KSC is all plastic.  The KWA has the better nozzle in my opinion that is why I want to install the RATech NPAS valve in the KWA nozzle.  If you look above BoobieM4H has installed a KJW NPAS valve in the KWA nozzle with great results.  It is not hard to remove the nozzle from the bolt nor is it difficult to disassemble the nozzle to get to the rocket vavle/NPAS.
Hmm... I didn't know that'd be possible.  I figured the KSC NPAS piston would be proprietary.  If it'd work that'd be nice, but there's still the restriction.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users