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 cylinder to barrel ratio

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kC_23
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bodyguard
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navyseal33
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navyseal33
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navyseal33


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PostSubject: cylinder to barrel ratio   cylinder to barrel ratio - Page 2 EmptyTue Dec 25, 2007 7:15 pm

First topic message reminder :

> a simple guide when upgrading your barrels and cylinders

CYLINDER: (cylinderVolume-to-barrel-ratio) 2 is to 1 (standard)Stock Cylinders:
1. Closed Cylinder = 27.1cc 450mm(min) 580mm(max) barrel length
2. XM Cylinder = "4/5 hole" = 364mm(min) 460mm(max) barrel length
3. M4 Cylinder = "3/4 hole" aka Type-2 17cc - 229mm(min) 430mm(max) barrel length
4. MP5K Cylinder = "mid hole" 9cc 110mm(min) 170mm(max) barrel length


Systema NB Standard and BoreUp Parts:
1. Type-0 Cylinder (closed) fits M16-A1,VN,A2,G3-A4,SG1,SIG550,AUG
2. Type-1 Cylinder (tip hole) for XM177, M4, AK47, AK47S, SIG551
3. Type-2 Cylinder (XM hole) for MP5-A4,A5,SD5,SD6, MC51,SIG552
4. Type-3 Cylinder (M4 "3/4" hole) for MP5 PDW
5. Type-4 Cylinder (MP5K mid hole) for MP5K
*BoreUp Closed 29.4cc = 500mm(min) 600mm(max) barrel length


KM Cylinder Parts:
*Intercept Cylinder 59 barrel length from 450mm to 590mm (Type 0)
*Intercept Cylinder 45 barrel length from 250mm to 450mm (Type 2)
*Intercept Cylinder 25 barrel length from 100mm to 250mm (Mid-hole)

*To avoid confusion, don't mix brand model names, just model equivalence
*TM M733 by stock is closed cylinder (Type 0) -over ratio

RATIO Guide: Standard-Efficient Ratio is 1.5 is to 1
2-2.5 : 1 for springs up to M130 --- 2.5-3.0 : 1 for strong springs M140 -> UP
<needs further research>

BARREL: (inner barrel length)
650mm/25.59in PSG-1 (extended)
595mm/23.42in APS2 OR
589mm/23.18in PSG-1
550mm/21.65in M16A1/VN/A2,AUG (extended)
534mm/21.02in Sig550
509mm/20.03in M16A1/VN/A2,AUG
472mm/18.58in Famas SV/F1
469mm/18.46in G3-A3/A4,SG1
455mm/17.91in AK47,AK47s
444mm/17.48in M60
407mm/16.02in M4A1 M653E2 (extended)
395mm/15.55in APS2 SV
369mm/14.52in HK51
363mm/14.29in M4A1,RIS,SR-16,XM177ED,Sig551
300mm/11.81in M1A1,AKBetaSpetz, M733
285mm/11.22in MC51
247mm/9.72in Car15,P90,G36C, SIG552
245mm/9.64in UZI - 400mm/15.74in (extended)
229mm/9.01in MP5A5/A4/SD5/SD6
170mm/6.69in MP5K-PDW (extended)
141mm/5.55in MP5K-PDW
110mm/4.33in MP5K

lol!
> post a reply or pm if you need further explanation
> more power to BAG!!!
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quicksand
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PostSubject: Re: cylinder to barrel ratio   cylinder to barrel ratio - Page 2 EmptyTue Apr 22, 2008 10:31 am

sisingit lang ng questions mga sir... so may effect ang tightbarrel sa fps??? kasi naka-airtight na po ako... upgraded internals (430 fps), napalitan na rin gearbox, motor nalang ang hindi... kaya po bang mapataas kapag na-tight barrel?
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navyseal33
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PostSubject: Re: cylinder to barrel ratio   cylinder to barrel ratio - Page 2 EmptyWed Apr 23, 2008 11:28 pm

@ quiksand
changing to a tight barel, theoretically yes
> tataas dapat fps
> kasi mas kokonti yung air na makaka labas sa sides nung bbs,,
> pero usually 10-20 fps lang

> yung aug ni sir ______ napataas namin ng 40 fps using a 6.03 EdGI barel
> pero ang main na pang pataas talaga is your spring (and eliminating leaks)

> tight barrels mainly improve your range and bb groupings
> since 430 fps ka na, advice ko, ok na muna yan
> pero if you want a tight barrel, PROM ang best brand available sa tupa
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kC_23
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PostSubject: Re: cylinder to barrel ratio   cylinder to barrel ratio - Page 2 EmptyThu Apr 24, 2008 1:13 am

sir navyseal
kung AK TB ok lng po ba na khit d magpalit ng cylinder?
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bodyguard
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PostSubject: Re: cylinder to barrel ratio   cylinder to barrel ratio - Page 2 EmptyThu Apr 24, 2008 2:01 pm

kc_baghawi_23 wrote:
sir navyseal
kung AK TB ok lng po ba na khit d magpalit ng cylinder?


sir dapat magpalit ka parin ng cylinder para wala singaw.....type O cylinder
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kC_23
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PostSubject: Re: cylinder to barrel ratio   cylinder to barrel ratio - Page 2 EmptyThu Apr 24, 2008 3:46 pm

ay gnun po ba sir? salamat.. hehehe
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navyseal33
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PostSubject: Re: cylinder to barrel ratio   cylinder to barrel ratio - Page 2 EmptyThu Apr 24, 2008 4:38 pm

for AK
> theoretically dapat with bore pa rin
> yung cylinder na may pinaka maliit na butas
> like yung stock cylinder ng jg AUG
> pag closed type kasi
> wala pa sa full decompression yung spring - naka labas na yung bb mo.
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rhomarkskirho73
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cylinder to barrel ratio - Page 2 Empty
PostSubject: Re: cylinder to barrel ratio   cylinder to barrel ratio - Page 2 EmptyFri Apr 25, 2008 5:27 pm

sir, e ang PSG-1 anong cylinder?? type O e up to 600mm lang
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PostSubject: Re: cylinder to barrel ratio   cylinder to barrel ratio - Page 2 Empty

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