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Could I pull of these upgrades with my gun?

1080 Views 11 Replies 6 Participants Last post by  Poppulanto
Hello! I was looking at some upgrades for my gun, but I want to make sure they are safe before I actually buy and install them. I was interested in a high torque motor to increase my ROF, and an 11.1 Lipo to go with it. Please note that I am fairly new to learning and understanding the internals of AEGs, so if any of those upgrades sound stupid, please tell me.

My worries started here: I have a completely stock gun, the KWA KR9. I know KWA guns are Lipo ready (maybe for a 7.4?), but I was unsure about an 11.1 Lipo. I was also a bit concerned about getting a high torque motor with a stock gearbox. The gearbox is a KWA 2GX, which consists of steel gears. I'm assuming it has the normal gear ratio of 18:1.

I would definitely buy a mosfet if I got an 11.0 Lipo, just so you don't freak out about trigger contacts burning out. I tried to put in as much info as possible into this post, so hopefully you can figure out an answer to my question. Thanks for reading, have a wonderful day or night! :)
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I'd stick with the stock motor and just use an 11.1 lipo and a MOSFET. That will significantly increase your ROF and trigger response.
Dont forget to shim the gears properly, and correct the AoE. Otherwise that 11.1 will turn it into a very efficient shredder :)
Dont forget to shim the gears properly, and correct the AoE. Otherwise that 11.1 will turn it into a very efficient shredder :)
I don't totally disagree, but don't mess around in the GB unless you know what you are doing. KWA guns are pretty good out of the box. If it was a cheap gun I'd agree more about shimming. As far as the AOE goes, if it looks bad, try to correct it but you most likely only need to do a little filing on a tooth or two.
Installing an 11.1 will make things wear out faster but it's not going to be destructive (as long as you don't mess with the internals). Depending on how often you play and how aggressive you are with the trigger you could run an 11.1 lipo for a long time with out a MOSFET. I don't specifically suggest it but it's totally possible.
One thing people don't often mention is that you should decompress your spring after using an 11.1. You can do that by either releasing the quick change spring guide if you have one or by firing a few shots (mag out) with a 9.6 or 8.4 volt battery.
I don't totally disagree, but don't mess around in the GB unless you know what you are doing. KWA guns are pretty good out of the box. If it was a cheap gun I'd agree more about shimming. As far as the AOE goes, if it looks bad, try to correct it but you most likely only need to do a little filing on a tooth or two.
Installing an 11.1 will make things wear out faster but it's not going to be destructive (as long as you don't mess with the internals). Depending on how often you play and how aggressive you are with the trigger you could run an 11.1 lipo for a long time with out a MOSFET. I don't specifically suggest it but it's totally possible.
One thing people don't often mention is that you should decompress your spring after using an 11.1. You can do that by either releasing the quick change spring guide if you have one or by firing a few shots (mag out) with a 9.6 or 8.4 volt battery.
That makes zero sense, at all. Sorry for being blunt, not doing it on purpose but that's how I am sometimes.

If you take a stock gun, and you want to run it on an 11.1v LiPo, and make it last at the same time. You're gonna have to mess around in the GB. No exceptions.

Filing a tooth or two off a piston does not sum up correcting the AoE. It's what you do after correcting it..

The decompressing thing you're talking about is called overspin, which can be easily fixed with a decent motor (Neo magnets stop a lot quicker than ferrite ones when the power gets cut) and/or an active braking mosfet, varies per setup.

And running 11.1's without a mosfet, that's just asking for burnt contacts man. Hell, you can burn contacts running a 9.6 if you spam semi auto enough.

Again, I don't mean to be blunt but I have no other way of saying this stuff. (Also, English isn't my native tongue if that explains it better :) )
We're talking about a KWA gun, they have strong motors and good internals and factory shimming.
I know filing teeth isn't correcting the AOE, and I know it's called overspin. But rather than explain overspin I just decided to tell the OP how to prevent spring issues caused by overspin. And there is a good chance the AOE is pretty good or at least good enough.
I'm not saying doing all the work isn't worth it, I'm just saying if he wants instant results he can just plug in a lipo. Granted, if that is the route he decides to go he has to understand it may require maintenance sooner than if he used a different battery.
There are several reputable YouTube channels and other players that say basically the same thing.

I currently have an m4 that is put together with random parts (nothing inside the GB is "performance"). I use an 11.1 2200 mAh 25c lipo and I don't have a fuse or mosfet, I removed one tooth on the piston to stop some rubbing. I've used the gun every Saturday for almost 6 months (about 4k rounds per game), I opened it last Sunday and the trigger contacts and other internals are perfectly fine.
I'm not suggesting the best method just just in my opinion the easiest answer to the original question. If he is a proper gun owner and performance regular maintenance on his gun and doesn't abuse it he won't have major issues.
If the OP puts an 11.1 in his gun (no mosfet) and destroys it within 6 months I'll pay to have it fixed.
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We're talking about a KWA gun, they have strong motors and good internals and factory shimming.
I know filing teeth isn't correcting the AOE, and I know it's called overspin. But rather than explain overspin I just decided to tell the OP how to prevent spring issues caused by overspin. And there is a good chance the AOE is pretty good or at least good enough.
I'm not saying doing all the work isn't worth it, I'm just saying if he wants instant results he can just plug in a lipo. Granted, if that is the route he decides to go he has to understand it may require maintenance sooner than if he used a different battery.
There are several reputable YouTube channels and other players that say basically the same thing.

I currently have an m4 that is put together with random parts (nothing inside the GB is "performance"). I use an 11.1 2200 mAh 25c lipo and I don't have a fuse or mosfet, I removed one tooth on the piston to stop some rubbing. I've used the gun every Saturday for almost 6 months (about 4k rounds per game), I opened it last Sunday and the trigger contacts and other internals are perfectly fine.
I'm not suggesting the best method just just in my opinion the easiest answer to the original question. If he is a proper gun owner and performance regular maintenance on his gun and doesn't abuse it he won't have major issues.
If the OP puts an 11.1 in his gun (no mosfet) and destroys it within 6 months I'll pay to have it fixed.
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I agree with proper shimming and AoE. I have a gun that has been on an 11.1 for months now and there is 0 wear on gears/piston teeth. It all just helps for the the longevity and the overall sound of the gun.
Just be aware that a motor change is not as simple as just swapping them over. For any motor change it is important to set the motor height correctly to avoid stripped gears, and the pinion gear height will probably need adjusting to suit. While I'm sure there are people out there who've got away with a straight swap, please be aware that it doesn't often work.
If your gun isn't already equipped with them get it kitted out with Dean's connectors to reduce electrical resistance. A mosfet will also increase the electrical efficiency by having lower resistance than the standard contacts, but the gearbox will need opening to make the correct connections.
What battery are you using at the moment? Simply switching from a 8.4 or 9.6 Nicad to a 7.4v lipo can improve trigger response and rate of fire because of the way a high discharge lipo delivers current compared to the higher voltage Nicad or NiMh
We're talking about a KWA gun, they have strong motors and good internals and factory shimming.
I know filing teeth isn't correcting the AOE, and I know it's called overspin. But rather than explain overspin I just decided to tell the OP how to prevent spring issues caused by overspin. And there is a good chance the AOE is pretty good or at least good enough.
I'm not saying doing all the work isn't worth it, I'm just saying if he wants instant results he can just plug in a lipo. Granted, if that is the route he decides to go he has to understand it may require maintenance sooner than if he used a different battery.
There are several reputable YouTube channels and other players that say basically the same thing.

I currently have an m4 that is put together with random parts (nothing inside the GB is "performance"). I use an 11.1 2200 mAh 25c lipo and I don't have a fuse or mosfet, I removed one tooth on the piston to stop some rubbing. I've used the gun every Saturday for almost 6 months (about 4k rounds per game), I opened it last Sunday and the trigger contacts and other internals are perfectly fine.
I'm not suggesting the best method just just in my opinion the easiest answer to the original question. If he is a proper gun owner and performance regular maintenance on his gun and doesn't abuse it he won't have major issues.
If the OP puts an 11.1 in his gun (no mosfet) and destroys it within 6 months I'll pay to have it fixed.
Your AEG is a best case scenario running an 11.1V li-po without a mosfet. I have seen a worst case scenario, the trigger switch literally melted, this was with a dinky little Firefox 11.1V 20C 1200mAh li-po. If the motor pulls a moderate current, you don't spam semi auto and have good trigger contacts you can run an 11.1V li-po without a mosfet for a long time before needing new trigger contacts. This is why many JG and CYMA AEG's can run an 11.1V li-po without issues, because they have low stress setups with relatively strong internals.

With a mosfet the trigger contacts will practically last forever and you can run high performance setups and not worry about the trigger contacts. A mosfet doesn't cost much and isn't particularly difficult to install so I don't see any good reasons not to have one in an AEG along with a fuse. The difference between a stock gun running an 11.1V li-po and one that's purpose built for it is that the purpose built gun will fully utilize the potential of the battery.

Btw, KWA internals are nothing special, they may be a bit above average, but nothing extraordinary.
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I will keep everything you guys said in mind when buying and installing any of the upgrades. I'm pretty familiar with the insides of a gear box at this point, so I'm not afraid to install the mosfet on my own. Thanks for all the help!
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