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Post by gunslinger 2-3 on Oct 28, 2012 13:21:59 GMT -5
so guys im planning on doing a large upgrade on my m4 and was wondering what kinda parts and stuff i should be looking at getting like what spring,piston, air nozzle or stuff like that any help is greatly appreciated
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Post by MotorMouth93 on Oct 28, 2012 15:27:03 GMT -5
If you're referring to the King Arms M4 in your sig, the odds are you won't need to replace much internally if you aren't trying to do anything crazy.
For reliability:
- Completely clean out all factory grease in the gearbox and relube it with white lithium on the gears and "Green Slime" RC car grease on the compression parts.
- While you have all the parts nice and clean, reshim the gearbox using the bevel-to-pinion method. Take your time on this, get it right.
- Since it's a version 2 gearbox, round the cylinder window corners (known as "radiusing the gearbox", significantly improves the stress distribution on the front end of the gearbox)
- Correct the piston to sector angle of engagement. The best way to do this is with a sorbothane pad superglued to the cylinder head, this has the added benefits of reducing noise by a little bit and adds more protection against the gearbox cracking.
- Solid steel bushings and a bearing spring guide. These parts may very well already be there, if so then skip this step. If it comes stock with bearing bushings, replace them, the benefits do not outweigh the risks involved with using them.
- Metal cylinder head. Mainly because I don't like plastic ones, most likely not necessary though.
- Air nozzle with o-ring. Makes it much easier to get good compression.
- Install a MOSFET, Deans, and rewire it using silicone insulated wire. I can probably get this stuff for you if you don't want to do it yourself.
- Sand the front of the tappet plate a bit so the air nozzle seals better with the hop up bucking.
- Make sure compression is perfect.
If you want better range and accuracy:
- R-hop, if you don't want to do it yourself there are people who charge something like $40 to do it for you.
- If not r-hop, the PDI w-hold bucking is one of the best drop in solutions.
- A tightbore barrel, Prometheus would be best, Madbull comes in second. This isn't near as important as a good hop up. There are widebore barrels available that will perform better, but they are pretty uncommon, and a 6.03mm tightbore with a quality bore is still better than a stock barrel.
- Use heavy BB's, .28g or .30g at minimum.
I've never cared for high rate of fire setups, but MugenSamurai would be a good person to talk to about that if that's what you're going for.
Switch to lipo batteries. A 7.4v if you don't care if your rate of fire is around 15-20rps or an 11.1 if you want higher than that. A torque motor with neo magnets will improve rate of fire a bit and make trigger response much better.
Order parts from clandestineairsoft.com, SHS makes great parts and they're cheap, and clandestineairsoft has very good shipping speed and costs.
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Post by gunslinger 2-3 on Oct 28, 2012 15:41:52 GMT -5
yes sir thats the gun and that was another question i have is whats better torque or speed in a motor?
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Post by MotorMouth93 on Oct 28, 2012 19:11:56 GMT -5
A torque motor is better in my opinion (or at least more universally useful). They can pull crazy strong springs on standard 18:1 gears or they can turn a light (or shortstroked spring) crazy fast with a 13:1 gearset and have great trigger response in both cases.
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Post by mugensamurai on Oct 29, 2012 10:32:08 GMT -5
I use a shs torque motor in both my ak and m4. Very fast and have more torque than you'll ever need with a 400fps cap. 18:1 rps high 20's. 16:1 low to mid 30's. 13:1 around 40's.
With 40c 11.1v lipo*.
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Post by nbustarhymes on Nov 2, 2012 11:03:37 GMT -5
Don't wanna thread jack and I don't want to put up another thread for this on question but...
What are the gear ratios for?
and
How do you figure them out? (how can you tell?) |
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Post by MotorMouth93 on Nov 2, 2012 14:39:01 GMT -5
Don't wanna thread jack and I don't want to put up another thread for this on question but...
What are the gear ratios for?
and
How do you figure them out? (how can you tell?) The gear ratio is the ratio of revolutions of the pinion gear to revolutions of the sector gear, typically given as xx:1. Stock gearsets are normally 18:1 (actually closer to 19 than 18, but 18:1 is what everyone says), so for every 18 turns of the pinion, the sector turns once. Speed gears are 16:1 or 13:1 typically, and then torque gearsets can be around 32:1 depending on how torquey you need them. Now that we have motors with neo magnets though, torque gears are less common in all but the most ridiculous setups as high torque motors have so much more torque than they did when ferrous magnets were used almost exclusively. The formula for calculating the gear ratios can be found in this thread: www.airsoftcanada.com/showthread.php?t=113135 |
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Post by mugensamurai on Nov 2, 2012 18:18:05 GMT -5
Or you can do dual sector. Not even I dare try that...
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Post by gunslinger 2-3 on Nov 2, 2012 21:19:38 GMT -5
that was actually one of my next questions along with inner barrel whats the diff between 6.03 and 6.01
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Post by MotorMouth93 on Nov 3, 2012 0:36:49 GMT -5
Bore quality is far more important than inner diameter. Prometheus barrels are excellent, but Madbull is good on a budget. 6.03 is generally recommended over 6.01.
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Post by gunslinger 2-3 on Nov 3, 2012 15:50:28 GMT -5
ok guys need some serious help here the other day i took my m4 part to customize it and once i managed to get it all back together it doesnt seem to want to fire any bb's it manages to push a few out but not the way it should idk enough bout these guns to diagnose them or anything so if anyone has ever ran into this problem any help would be greatly appreciated
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Post by mugensamurai on Nov 3, 2012 16:00:01 GMT -5
Air Nozzle not properly seated on the tapper plate? Hopup bucking not properly seated on the barrel.
Are the bb's just falling out if the barrel or just not flying as far as they used to?
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Post by gunslinger 2-3 on Nov 3, 2012 16:07:12 GMT -5
i havent really shot it to far just test fires into a back stop but it will fire one cycle a couple times fire againg if luck but it cycles perfectly it just isnt shooting one after the other like it should be doing the bb's just arent coming out in succession to each other
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Post by gunslinger 2-3 on Nov 3, 2012 23:44:47 GMT -5
ok guys so i took it all apart again reasembled the gearbox with the tappet properly seated this time but now when i put it all back together and put the motor back in the first time i got off one good cycle now it acts like the battery isnt strong enough to push it kinda like its to tough id say idk im to the point now if someone can fix it get it back to working again id be willing to give them my kart m14 or if someone can help me work through this anything
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