Upgrading spring...

[highny]

Hello everyone!

I couldn't find any forum that could answer my question, so sorry if somebody already answer this.

I'm looking into upgrading my spring and I've been thinking up to FPS 400-415.

Now, I know there's a spring guide chart, but it's with .2 bbs which is .05 less than what I use...

I'm using .25 bbs, so I'm just wondering, how much FPS would drop between .2 and .25. And which spring would you recommend at wargameclub.com to get my FPS up to 400-415 if I were to use .2 and .25.

Also, I read that, if I'm increasing the tension of my spring, I should always get better bushing. The mod guide I read on the sticky part didn't really give me enough info to find the right one for my gun.

I use an ICS M4 so I'm assuming it's a v2 gear box. There's different size of bushing out there, so does anyone know which size is for this gear box?

Also, which type would you recommend(with stand tension up to 400-415 FPS with .25 bbs) at wargameclub.com? There's lots, but they don't give any detail on any of them...

If you got another website that's better than wargameclub.com, please feel free to leave me the link.

Thank you for reading.

[Bissa]

your velocity would be somewhere around 360FPS if you are using .25. if you are not entirely sure what you are doing you might want to consider getting a local gun tech to do it.

[CDN_Stalker]

The is a roughly 30fps drop when going from 0.20g to 0.25g.

Here's a question, are you allowed to use that velocity at your local fields? And why go for that fps (which by my reading you are looking for 430-445fps with 0.20g)? The sweetspot for most airsoft guns is 360fps using 0.20g BBs, and use 0.25g or 0.28 in it for outdoors. Don't think that heavier BBs in a lower fps range will be falling to your feet, they will travl plenty far and fast. I've proven this time and time again. I'd even use 0.25g or 0.28g BBs in a stock TM AEG, just because I know my ballistics will be good still.

[Skruface]

The main site I visit for parts is www.airsoftparts.ca

However, I also use www.wgcshop.com and www.redwolfairsoft.com on a regular basis for the stuff Juggles at airsoftparts doesn't carry or have in stock.

[ILLusion]

http://www.cimmerians.org/FPS_Converter.html

What field are you playing at that will allow you to shoot your AEG up to 465fps w/ 0.20g BBs? That's what a 0.25g BB firing at 415fps will equate to and can hurt someone pretty bad if you don't know what you're doing.

You are pushing 2 Joules of power at that velocity.
In Ontario, most organizers limit AEGs to only 1.5 Joues, which is less than 400fps with 0.20g BBs.

[Bissa]

no, he was asking what velocity it would be fireing if he used .25 in a gun that fires 415 with .2s.

[ILLusion]

Yes, but he also asked what spring will get him up to 400-415fps with .25 (and .2).

If I'm just totally reading that wrong, then a gun upgraded to shoot .20g BBs @ 400fps will be equivalent to 359fps with 0.25g BBs.

Or if upgraded to shoot 0.20g BB @ 415fps, then the 0.25g equivalent would be 371fps.

[highny]

Wow, I'm so sorry for asking question in weird format... Here goes again.

A: What spring tension(M130?/170%?) do I need to shoot from 400-415 FPS with .2 bbs?

B: What spring tension(M140?/190%?) do I need to shoot from 400-415 FPS with .25 bbs?

C: If I were to upgrade my spring up to M140/190%, what type of bushings would I need to support this high tension spring? Any recommendations?

D: With an ICS M4 airsoft assault rifle(which I'm assuming it's a v2 gearbox), what size of bushing would I need?

E: If you answered question D, were did you find out the info about this brand/company's gear box?

Again, sorry for the confusing you all with my weird/messed up way of questioning.

Thanks again for all that answer my question.

[CDN_Stalker]

Originally Posted by highny

Wow, I'm so sorry for asking question in weird format... Here goes again.

A: What spring tension(M130?/170%?) do I need to shoot from 400-415 FPS with .2 bbs?

B: What spring tension(M140?/190%?) do I need to shoot from 400-415 FPS with .25 bbs?

C: If I were to upgrade my spring up to M140/190%, what type of bushings would I need to support this high tension spring? Any recommendations?

D: With an ICS M4 airsoft assault rifle(which I'm assuming it's a v2 gearbox), what size of bushing would I need?

E: If you answered question D, were did you find out the info about this brand/company's gear box?

Again, sorry for the confusing you all with my weird/messed up way of questioning.

Thanks again for all that answer my question.

First of all, forget about attaching the % to the above. Second, most springs are rated in meters per second (many aren't rated properly, a 110 spring should be around 360fps with a 0.20g BB, but the Madbull springs I've used all shot around 415fps, so there is an answer for your first question), that is what the number is. So:

A: See above;

B: A Madbull 120. Lol

C: Standard metal bushings, 6mm, any brand really. AVOID BEARING BUSHINGS!

D: ICS M4s don't have a V2 mechbox, they have a split mechbox. Same applies as above, 6mm metal bushings.

E: Word of mouth, experience working on them. Doesn't take much to find these things out.

[voorhees -FWA-]

DON'T DO IT!

Keep your ICS M4 STOCK... man o man... I've had nothing but problems... and now I'm waiting on gears just because I decided I wanted my ICS M4 to fire over the 400FPS limit.

Within the first week, everything stock, my piston body broke, ok, fine, I can deal with that. Tried to contact Shinobii about it, and I gave up after he stopped replying. So, I replaced it with a Deep Fire piston body, yay!

Then I decided to get the upgraded upper, the MA-54... and this is where the fun begins! I lubed all the moving parts in the upper, greased the seals... anything that would move when the rifle was cycled. Now, I wanted the rifle to stay firing at 370ish FPS, so instead of putting the 120 spring, I decided to use a 110. That being said… I bolted it all together put it in the rifle… and fired…

Five shots away and the gear box grunted and back spun. Hmm… what the hell?

I took the lower box apart. The teeth that spin the Spur Gear, on the Bevel Gear, broke off and a tooth was missing on the Spur Gear. *sigh* So, I then decided to check out the upper (curiosity got the best of me) as it turns out, the pot metal insert (the last tooth) on the aluminum piston was also broke. This got me to thinking what the hell would have happened if I used the 120 spring?

Moral of this torrid tale… ICS does make lemons and I have the biggest one they made… upgrade the spring?

Don’t do it. Keep it stock for as long as you can!! LOL… funny stuff!

[highny]

Thank you all for replying.

I learn that having power(+FPS) Doesn't really increase speed/accuracy, so I'm looking into upgrading my inner barrel(I heard that stock inner barrel = 6.08mm) and my hopup unit, not sure which part of my hop up, or maybe the whole unit, but I shall find out! Thanks again.

[Con Murder]

Originally Posted by highny

Thank you all for replying.

I learn that having power(+FPS) Doesn't really increase speed/accuracy, so I'm looking into upgrading my inner barrel(I heard that stock inner barrel = 6.08mm) and my hopup unit, not sure which part of my hop up, or maybe the whole unit, but I shall find out! Thanks again.

Thats the right idea, I was using stock material on my gun for 6-8 months then thought to upgrade it. First added an extended tbb (6.03 at 363mm), proper cylinder, nozzle and bearing piston head. Instantly noticed a huge improvement in the ways I needed, groupings and distance. Was recomended by asc users the m100 so I got it with the bushings and bearing spring guide. Absolute perfection, is all I can say.

Oh, I did the hop up rubber as well but the SIG hop up is thinner and the new rubber didn't fit so I left it stock.

This is my dream, good consistant shooting. I've seen others turn guns into nightmares of epic proportions.

[highny]

About upgrading. Does anyone know if I get Marue parts, will it fit my ICS m4? Because I'm planning to get this "Guarder Cylinder Enhancement Set for Marui M4-A1/M4-RIS/SR-16/M733"

If it won't fit, can anyone tell me where can I find parts for ICS gun (split gearbox)?

[voorhees -FWA-]

Talk to Jeff from Capital Airsoft... he can set you up with any ICS parts you need. Like I said before I installed the MA-54 kit which has everything you need to upgrade your upper, including a new shell... just don't install the spring - keep it at 100 or 110... I also went with a Mad Bull tight bore barrel and a guarder hop up (waiting on my Fireflies).

[Skruface]

If you keep your velocity in the 350 fps range with .2's, not only will your mechbox last a lot longer, but you can't go wrong with a Tanio Koba Hop-Twist barrel.