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My New SR10 & Upgrades

SR10 upgrades mosfet capacitor bank compatibility tbb

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#1 ThaPimpShrimp

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Posted 27 August 2012 - 02:54 PM

Hey everyone, I am relatively new to the Airsoft scene (though not guns) and I recently purchased a used (albeit only 6 months old) KWA SR10. I am extremely happy with the gun and just played my first full day with it yesterday. It's a very solid gun and I am glad I purchased it. And thanks to Niko I'll be able to clean and maintain it properly too. :)

I have been reading, researching, and deciding what kind of upgrades I want to do for my gun. I play pretty much only woodland games on private property so no restrictions of any sort necessarily..

Essentially what I have decided what I am looking for is accuracy, range, trigger response, and of course, reliability. The stock ROF I have is fine, as is the FPS. Not saying it won't change with these mods but I likely won't be changing the spring, motor, piston, or anything like that. I just have a couple questions on a few of the modifications, and maybe you guys can help me decide on some things.

First is the MOSFET. I plan to do this upgrade to hopefully help keep my gun safe from deteriorating trigger contacts etc. from the 11.1LiPo I plan to buy (currently running a 9.6v 1400mah). I understand generally how MOSFETs work and I believe I can install it myself with a little help from the YouTube :) . My question about it is.. which one should I buy that is best for my needs/gun. I don't need nor want to really adjust or program firing speeds etc.. just to have active braking and protect my electricals. If it came with those then fine, I just don't want to have to mess with it too much. More plug and play. 3 round burst may be fun though..

Second is about Capacitor Banks. I've read a bit on these but it doesn't seem like a super common mod and I've heard may be redundant and unnecessary with the 11.1 LiPo batteries. Is that true and should I even bother? I really would like a reliable, fast, and crisp trigger response and that's what I was going for with this mod.

Oh, and I also will be upgrading to deans for obvious reasons :P

I am very open to any suggestions or comments you may have, as I am new I might not have heard about something and I am eager to learn! If you have another mod which may suit my needs I am happy to listen. I have also considered getting a 6.03mm barrel but that argument seems to be split a pretty even 50/50 so I plan to keep it stock until I am convinced.

Thank you :D

Edited by ThaPimpShrimp, 27 August 2012 - 03:04 PM.


#2 aaps59

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Posted 27 August 2012 - 04:53 PM

As for accuracy, range, trigger response, and reliability...
Accuracy and range, I recommend .3's. These will be amazingly accurate and will give you very decent range. If you really want to extend the range, you can look into a Rhop or a flat hop mod for your hop up. If done properly, this can add more than 100ft of range.
Trigger response, switching to a 11.1 and a lipo will give you amazing trigger response.
Reliability, follow the manual, take care of your gun, stay in spec, and love your gun.
I dont know all too much about the electronics stuff, and I havent been able to find a mosfet that I like, so Il leave that to someone else!
Welcome to the forum!

#3 ThaPimpShrimp

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Posted 27 August 2012 - 05:17 PM

Perhaps I am showing my "newbieness" here but will using .3's over .25's (my current weight) make my range drop off a little?

Thanks for the warm welcome and response aaps :)

#4 aaps59

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Posted 27 August 2012 - 05:18 PM

It may drop your range a little bit, but its worth it for the accuracy.

#5 ThaPimpShrimp

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Posted 27 August 2012 - 05:38 PM

Hmm alright I'll give it a shot and see if I like it!

Back to MOSFETs for those looking to help with that. I've seen Extreme Fire suggested a lot and I saw this chart of their products and features http://extreme-fire....atureChart.html


It looks like the two that would work best for me are either the SW-JAGUAR-2N or the SW-PANTHER.

The Jaguar is $80 and just has active braking and current protection. The Panther has all of the goodies but costs $5 less.. am I missing something? Could the Panther possibly be too big to fit?

Also my worry with getting something that is programmable is that I will screw something up. I just want to plug it in and have the protection. If someone has experience with those is that the case, can I just plug it in and leave the ROF control etc alone and it'll work as if its not there? It might be cool to play with it at some point but I am just unsure about it.

Edit: Reading up a bit more on the Panther and it's making a lot more sense.. knowledge is power! Still would like some opinions and insight :) Now I am pretty interested in the SW-CHEETAH-2N!. I like its capabilities and now that I read the whole manual it's a lot simpler. Still though it's about $100! Expensive!

I'd love some opinions on those capacitor banks :D

Edited by ThaPimpShrimp, 27 August 2012 - 06:06 PM.


#6 vanevery

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Posted 27 August 2012 - 06:57 PM

Do the upgrades you plan to do require a Mosfet?
In other words, are you needing so much power to pull a super heavy spring that you will need an out of spec Li-po?
Will you be building a platform w/ such a high ROF that you will need a a better electrical system to handle the continuous amps?

The gun you have can give you fantastic performance in stock form.
A simple bucking change can dramatically extend your range and accuracy.
Consider R-hop and Flat-hop mods.
Using an in-spec Li-po can give you a nice / crisp trigger response and a bump in ROF.

I suggest getting the most of what you have w/ what you got.
For less than $40.00, you can out shoot most players on the battle field using all the above suggested.

Edited by vanevery, 27 August 2012 - 06:58 PM.


#7 ThaPimpShrimp

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Posted 27 August 2012 - 07:18 PM

No I don't plan on using an out of spec Lipo, mostly because super insane ROF isn't really top priority for me, but also because I'd rather not damage my gearbox or other things too much. The reason I'd go for a MOSFET is for the safety and reliability more than anything..but I see what you're saying about it. Still just considering everything.

I'll definitely look into the buckings though, thanks for the tip Van.

From the looks of it though I think I won't be doing anything with capacitors. At least not anytime soon, a little complicated and there have been a number of reported "disasters". Particularly exploding capacitors.. Plus there might not be too much gain if I'm already running a lipo.

#8 ThaPimpShrimp

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Posted 27 August 2012 - 08:51 PM

Does anyone know about a good deal on an 11.1 lipo within spec? Also I'll be needing a lipo charger. I've been searching but can't seem to find much. Came to find out my bucking is torn today so I'll be ordering a new one of those.

Will one of these work? http://eliteairsoftb...ttery-pack.aspx

Edited by ThaPimpShrimp, 27 August 2012 - 09:24 PM.


#9 niko_gpsy

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Posted 28 August 2012 - 04:07 AM

If you are happy with the current ROF and FPS, all I would suggest is to just change to deans for now.  A mosfet is nice and I am sure you have done your research about the pros and cons on such units but as vanevery already stated, unless you are planning on doing performance mods that will require you to use out-of-spec batteries, I would place a hold on that for now.
And remember to keep your bucking and barrel as clean as possible and you will be amazed at the difference it will make.

#10 ThaPimpShrimp

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Posted 28 August 2012 - 04:49 PM

Alright niko I'll definitely keep all of that in mind (And thank you for your videos in the DIY section, very helpful).

Just for future reference, and to make sure I understand this correctly, if I were to install a MOSFET then I could safely use a Lipo with a higher discharge rate than 15c correct? The MOSFET would protect the electrics and since the voltage isn't going up, the mechanical internals won't really be receiving more stress (plus the ones I am looking at have a programmable RoF so I could turn it down).

What affect does the discharge have on a gun (behavior, mechanically, and electrically) versus the affects of a higher voltage.

#11 Standard4130

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Posted 28 August 2012 - 05:08 PM

I've purchased 6 Cheetah's so I can give you my 2 cents on the subject........They are fantastic! I like having Don's trigger master software installed because it unleashes the mosfet's potential a bit more than the standard programming. BTW, they are only $90 without a printed manual.......

Edited by Standard4130, 28 August 2012 - 05:09 PM.


#12 niko_gpsy

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Posted 28 August 2012 - 05:12 PM

A MOSFET will still allow the battery to deliver as much as the motor pulls. What a simple MOSFET setup will do is allow power to bypass the trigger mechanism where the trigger is now only used to send a very low (0.1A) power signal to the MOSFET channels then to the motor. So theoretically you can still have massive power surges when batteries with very large discharge capabilities are used.  So make sure you keep the fuse.
And voltage is the force that drives the power (amps) through the resistance of an electrical system so higher the voltage, more efficient the system that will allow for better/larger delivery of power to the motor.

#13 Standard4130

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Posted 28 August 2012 - 05:19 PM

It all adds up to the watt load a motor uses to do the work......... And you don't necessarily need to keep the fuse with a Cheetah installed.... It's self protecting & self resetting. The fuse can bottle neck performance you may or may not wish to unleash......

#14 ThaPimpShrimp

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Posted 28 August 2012 - 05:19 PM

So what affect does having a higher "c" rate have on the system. I know Amps = C-rating X mAh/1000.. but what does that mean as far as performance. Since a motor will only draw what it needs, then putting a higher rated battery in the system will just create the chance of a large power surge to damage the system.

Then I guess I am getting at - what is the point of a battery with a higher "c" value

#15 Standard4130

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Posted 28 August 2012 - 05:24 PM

And amps X voltage = Watts...... You have to have all the numbers to calculate power potential correctly. The short answer is that a higher "C" rated battery can discharge more amperage than a lower "C" rated battery at EQUIL rated capacity....(MAH)

#16 Standard4130

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Posted 28 August 2012 - 05:26 PM

Example ...................a 900mah 25c puts out more potential amperage than a 2200mah 10c...........

Edited by Standard4130, 28 August 2012 - 06:01 PM.


#17 ThaPimpShrimp

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Posted 28 August 2012 - 05:28 PM

View PostStandard4130, on 28 August 2012 - 05:24 PM, said:

And amps X voltage = Watts...... You have to have all the numbers to calculate power potential correctly. The short answer is that a higher "C" rated battery can discharge more amperage than a lower "C" rated battery at EQUIL rated capacity....(MAH)

Right, I get that. But for example if your system only draws 20a, but the battery is rated for 100a, then why get a battery with higher amps. How does amps affect normal performance. All I can see is potential damage to your system.

Maybe more specifically, what benefits and downsides are there for a 11.1v 15c 1500mAh battery VS 11.1v 25c 1500mAh battery in an SR10.

#18 Standard4130

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Posted 28 August 2012 - 05:37 PM

When an electric motor first starts it draws a huge current to get it up to speed if available.... This is where you get the "magic" trigger response from running high "C" rated 11.1v Lipo's. So the difference is great between the two mentioned battery's.

#19 Standard4130

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Posted 28 August 2012 - 05:39 PM

You are looking into the right mosfet..... Terry's mosfets have soft start pwm to keeps things from shredding in the gear box from high starting amperage.

#20 ThaPimpShrimp

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Posted 30 August 2012 - 08:13 AM

So, just out of curiosity, running that mosfet with a battery like this one http://www.amazon.co..._pr_product_top should be pretty safe? I mean in comparison to one that's 15c.

Also any idea if this would fit? I can't seem to find max dimensions of the lipo spot for the SR10 crane stock.


Orrr even better, would any of these fit? http://www.hobbyking...tSortOrder=desc

Sorry for all the questions! D:

Edited by ThaPimpShrimp, 30 August 2012 - 08:28 AM.






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