New member - G&G CM16 Predator firing issue

[delbert]

Thanks for the advice on the chargers guys.

What a great community you have here

 

[Sitting Duck]

Thanks for the advice on the chargers guys.

What a great community you have here

not me or him or anybody in particular...

WE ALL have a great forum - there are loads of top diamond geezers on here

a few I have met but loads n loads of the regulars are top notch and gladly helped me and probably hundreds like me

there are loads of posts about that go into detail a lot more about chargers

the clones are not bad if you monitor them but for general safety sake and peace of mind get a genuine one is best for a tiny bit more

hobbyking sell both clone and genuine ones

(buy from UK or EU - if not careful you can buy worldwide-Hong-Kong and takes a while to arrive)

Alas couldn't find a nice cheap 11.1v lipo to go in crane stock on HobbyKing when I last looked

so the componentshop 11.1v lipo is about only one or two options atm (god knows what a G&G lipo would be )

anyway component shop are a great shop and also sell stuff on ebay

right waffling again - loads of info out there

I've learnt loads by being a nosey bastid and searching for some other poor sod's bad luck/lucky findings

(god bless google)

 

[Sitting Duck]

minor update on my own FFR2 - was gonna take out this afternoon for a half day blast.....

(was a smidge over the Mall's top 340 limit (345-ish))

so late morning having a blast in my garden and thought what is rps on 11.1v lipo expecting 20rps

hmmm - 17.9rps - battery shows 12.08v that is a bit lower than expected....

pops open the pistol grip and expected to see a blue powerful ferrite motor from G&G....

Lame ol' stock 18,000rpm G&G one - ahhh that is why she is down a bit, them blue's are a bit quicker

Hmmm - ok think I got a modest neodym motor around say 25% more zest that should be quick but not too mental

pops that in - ooh much snappier - oh heck blew the fuse - lol

25a clear blade fuse, sure I got some 30a green blade fuses somewhere

hmmm now I'm left looking at new blade fuse holder with led fuse blown warning light with better wire on it (12awg)

then I'm left thinking pop in say silver wire at about 16.5awg instead of tiny thin stock wire

then I gotta open her all up - hmm was trying not to do that just yet.....

Yeah but may as well do AoE n stuff if I'm opening her up....

Damn it - now I'm thinking of this n that and where I start & stop and looks like I'm not going for a blast in the woods....

Oh well might be tearing hear apart this afternoon then and see what is inside.....

might apply a bit more solder carefully to burst pcb board's main tracks to allow it draw extra juice on deans etc....

Yeah think by Sunday the gun will be another wrecked masterpiece but what the heck

if she has to run on 11.1v lets see how much abuse the ETU & stuff can take

if she can't hit 25+ on 11.1v with modest neodym then that is a bit lame to me

like the burst gimmick so hope I don't kill it but wtf - let's have a rummage and see what I got and what is inside.....

 

[Sitting Duck]

F*ck it, ETU 3rnd burst fet is still blowing fuses

looks like that w@nked

gears inside are like toffee

Think either its getting launched down the garden in bits

or

By the time I'm done very little inside this box will be G&G

now I'm looking at conventional trigger, new gear set, new piston & piston head, nozzle, tappet plate, bushings

only the trigger, cylinder & cylinder remain - ooh and some springs

ffs - what started as a quick test - the whole ar$e has fallen out of this crap now

 

[Anno]

OH good god! I'm glad you know what you are doing. That sounds scary to me, fear of the unknown!

Small update from me,

I bought a Noveske Flamepig flashhider from Madbull.

Took the stock flash hider off the end, no problems there, just a small grub screw.

Pick up the flamepig, all looks good, correct thread size - 14mm.

Line up flamepig and barrel, begin to tighten...why isn't this working?

Double check thread size...no that is correct, try again.

What the F%&K am I doing wrong?

Youtube G&G flash hider removal.

Try again, still won't go on.

Took me an hour to realise I had bought positive thread.

That was a fun evening. I have also ruined a trigger switch for a torch by trying to shorten the cabling and resoldering. Ran out of flux, forgot to tin the end of the solder gun. Awful time all round.

Lot's of lessons learn, 0 productivity to date.

 

[Sitting Duck]

Try again, still won't go on.

Took me an hour to realise I had bought positive thread.

Yup been there - bought a nice supressor - one of them cw & ccw at either end

won't go on - wtf ????

turns out BOTH ends had cw threads - both ends go on Army R85 but nothing else ffs

(well think G&P barrels use cw threads but not got one so don't quote me)

Truth be told it is good to admit our screw ups - proves we are human

lets others know they are not alone when they do something stupid

plus by screwing up is how we attain wisdom - wise after the event

as well as others can learn from our misfortunes

Currently - dropped a zci/core set of speed gears in there and what a smooth turning difference already

won't be first time a quick afternoon tweak turns into a week or so project

(keep walking away thinking wtf is gonna crap out next)

ps - I wouldn't say I know what I'm doing, well I'm very highly skilled in breaking guns

but as to fixing them - I got a long long long long long long way to go

I'm still blagging my way through everything everyday

 

[Sitting Duck]

FFR A2 - jeeeez more like FFS !!!!

now according to G&G themselves the gun has a 260mm barrel:

http://www.guay2.com/web/gc_product/CM16_FFR_A2.php?lang=en

yup - deffo says inner barrel 260mm - uhmm who the heck measured this coz it is only 200mm

even compared the gun pic to mine coz there are FFR 12 9 SD and other variations.....

Nope - exact same gun - same front end same holes in RIS etc.....

200mm I have measured it twice, did this guy who measured the barrel do the building on the mosfet unit as well ???

Now I can hardly talk either the way I break stuff but at least I can measure stuff properly

well ok - I lie a bit to the other half about the length of one or two things but that is another matter....

So it is a shorter 200mm barrel not 260mm like the specs say

This may explain why it was a little hot coz air/volume was out when ported for say 300mm barrel

Ahh bollox to this - is there anything G&G can get right lately - or they really are just slapping any crap together now

Oh and just realised now after changing cut off lever - was a bit wobbly

If fitting an ETU as an upgrade - pah upgrade ???

If fitting ETU then they supply another tappet plate - yes I need to change that back to a normal one too

I thought I could use the one on there - nope

After getting cut off replaced it dawns on me - oh crap, there is no selector plate lifting up of cut-off lever on auto

So in other words - the old ETU selector is like a trimmed back plate - in effect locked to semi only like a dmr plate

So far I have replaced:

SHS 8mm cross bushings - bronzey ones wear so damn quick

Core ZCI 13:1 gears - junk G&G, swear they are getting worse or not properly treating them - burr crunch crap

SHS metal lightened piston + atm a silent piston head - never a great fan of their piston heads, Shortstroked 3 teeth so far

ETU removed and atm using old trigger switch but may change to a brand new new SHS one

SHS cut-off lever & soon a new selector plate as I just discovered it will be semi only ffs

Element AR latch - G&G is a fat bastid and had one break in a CM18 last year after only 4 or 5 outings

SHS tappet plate - these can retract a little too far but have tried a modification to stop it bending/breaking

SHS M4 nozzle - these can be a smidge too long but hopefully tappet mod will ensure it feeds very well - we shall see

I think cylinder & cylinder head is all that remains atm plus a couple of springs - though tappet spring might need a coil cut off maybe

Dremmel'd the box a bit for thicker wire - tiny bit more filing required perhaps

The G26 or tactical G&G pistol grip has a bit more room to squeeze thicker wire past motor than normal CM grips

Not sure of motor to use yet - either shs torque or mental mofo and keep it on 7.4v

Mosfet - hmmm might have a 3034 as a plug in - couple of extra deans connectors but could swap out for a Kong easily

or just run a 3034 in an unbroken wiring loom for almost zero resistance.....

 

[Sitting Duck]

Nearly getting there......

probably get it back together today but won't be testing until tomorrow as got to visit outlaws

in case anybody is thinking of ripping out the ETU and some tweaks - just use silver low resistance wire

coz it is a major pain in the ar$e trying to squeeze really thick wire n stuff in there....

Jeez G&G - move the AR a smidge ffs

The stuff I'm using is actually thinner than Turnigy 16awg @ 3.1mm

It is just a smidge thinner insulation coming in at about 2.75-2.8mm but still tight as a camel's ar$e in sand storm

If anybody got Turnigy 16awg in a G&G v2 - there must very little left of the box is all I can say.....

Also there is a pic showing that G&G v2's use larger trigger switch springs - a shs spring or other v2 spring don't fit on

The lug is fatter than say other boxes and trying to stretch/bodge it on ends up like a pubic hair bent up spring....

Luckily I found a v3 trigger spring that I guess some people like G&G use in v2's

anyway if anybody is interested - here is one major bollock-ache project made worse coz of thick wire and trigger mod etc....

Oh and would only fit that ultra swiss cheese shs piston to a fully enclosed box like this G&G v2 or say a v3

if it had an inspection window at the back - I wouldn't have used it - tend to think it might have caught on window

with so very little rails/runners to support it otherwise...

Just managed to get complete piston in @ 19.99gms - Short Stroked 3 teeth but 10mm piston spacer and bearing spring guide

I'm using a silent piston head to see if I get here her a little more hush but may reduce final fps a tiny tiny bit - well we shall see

Hoping that should equate to nearly what she was shooting aprox 345fps - damn sure that is a m115 spring in there at least...

205mm barrel not 260mm and pi$$ poor piston seal hitting 345+ - deffo no m100 or m105 me thinks - well we shall see.....

aiming to make it somewhere about 330-ish to make it Mall compatible....

If it is below - I am looking at slightly longer barrel - 229 to 250 as I got suppressor on there to knock it up a smidge

Oh well - that bit is for later on stuff......

http://imgur.com/a/4Ilel

 

[Sitting Duck]

Well what a ball-ache......

smashed the zci/core bevel to crap on 11.1v @39rps

rebuilt box again but with SHS 12:1's SS 3 teeth coz piston was already 3 teeth short

thought - hmm might used solid bushings or a mix of both solid & cross bushings

yup go for 50/50 solid/cross bushings - uhm came unstuck using solid on top of bevel

bevel was too low with a shim - heard these 8mm solid bushings can be a bit proud inside of box

deffo too proud for bevel so sanded and sanded quite a bit - yup got some room but still only used a 0.08mm thinnest shim I could find.....

thought drop the silent piston - yup did that but shimming might still be a bit out - won't use shs solid for top of bevel on next build or check before I glue all 6 bushings in place for good - jeez they ain't coming out or moving easily, or I would of replaced/swapped them about ya see

(JB Weld is f*cking $hit hot, especially left overnight to properly go off)

anyway tried a couple of motors and finally settling on this final output on a 3700mah 25c 7.4v - not fully fully charge about 8.15v:

so yup should hit 30 - 32rps once I've finished wiring on a full lipo

it is using a 275mm barrel but should be hidden by 100mm suppressor over the stock 205/210 outer barrel

might be better with 250mm(G36c) or 229mm(ak74) or stock 205mm barrels for the Mall but hopefully this will last (fingers crossed)

Nope not going for 11.1v as that would hit 45rps and might be close to PE - think it should be ok but ain't risking it

This is kinda where I was expecting - maybe the 7.4v that gave only 22rps is a bit duff or something as expecting 26 on 13:1 with a 7.4v lipo

Anyway - f*ck me it was a bit of a pain to swap it back from ETU - yes wiring & trigger mod added to fun

but you really really need to check fire selector plate's as it has about 2 or 3mm trimmed off back or it catches inside the new G&G receivers

This in effect means when you select auto it won't go to 3 o'clock but more like 1:30 so it don't fire correctly

file/cut or trim it wrong - or in my case thought it was up by cut-off lever - trimmed that - big mistake and got another DMR tappet now for semi only

It is the very bottom tail piece that needs trimming on both other selector plates - about 2 or 3mm and she selects auto correctly

Stupid G&G ETU pile of junk........

(oops - said tappet - selector plate - my dumb ar$e mistake)

pic says 1,000 words:

main problem was the end of selector plate - needed to trim off about 2-3mm like I said

a tiny file also at where cut-off lever rests to ensure she settles 101% down for perfect semi

(probably not needed but trigger mod and was just wanting lever to settle 101%)

do not trim any off the left of cut off lever or you get the DMR mod - like I did Doooooohhhhhhhhh

So with G&G's ETU tappet and now with my first attempt went wrong - I got 2 x DMR tappet plates now

Anyway - G&G, do us a favour if possible....

Sort out the ETU properly or just sell ya guns with or without ETU

would of made this a bit easier

Hoping to do a similar build on the 2nd FFR A2 but with the silver low resistance wire that don't need the box getting hacked to $hit

Then compare how much difference the outcome is on mofo thick wire and what I believe is best/easiest wire upgrade for boxes like G&G's

Phew...... - still a bit of tidying ad barrel testing but yeah - sort of pleased but just hope she lasts - should do as I'm going shs or RA only now

(cheers pete from ak2m4 - stuff arrived but will use in next rebuild)

Ran a quick test on one lipo and modest motor and was hitting 17.6 amp draw

dunno what the specs say/mean as long as it friggin' works for a while

still might open her up coz still not truely happy with shimming but could be motor angle itself

Though I checked the gearbox to receiver then gearbox to pistol grip and adjusted the fittment

hmmmm - poxy toy guns

FINAL UPDATE: (in case anybody cares)

dropped spring a little so can use at Mall and after trying a few hop combinations plus another few openings to check and adjust shimming

(few openings - pah about 8 times or more ffs)

325fps - 25rps on 7.4v - 16.5amp draw - slower shs torque motor - feeds lovely @ 25rps than a little smidge mis-firing at 31rps

(weird coz did a mod to ensure I have over 9mm total tappet/nozzle movement which should of helped feeding with a delay clip)

shimming still isn't not prefectly buttery smooth as I hoped for but deffo better than she has been

Pistol grip has been well mullered a bit - was sure it wasn't fitting flush on box/receiver - so kept hacking away at her

think I may add say a 1mm -1.5mm spacer between grip & box next time - got longer grip screws on the way

Think I'm gonna quit whilst she still works - atm

tweaked an iffy 416 so hopefully that might behave a bit too

the FFR cycles nicely - quickly completing the cycle - tried flicking trigger to leave her in dead zone but she is working ok

on rare occasions - once or twice but was trying to check total nozzle retraction - trying to get her to just stop with nozzle fully forward

coming off auto to semi she stopped in dead zone but like I said I was messing about trying to stop with nozzle fully forward

Nice to see Zero One haven't published my review of ETU gun, still gave it 4/5 stars but just was truthful that ETU wasn't quite flawless

 

[ciangovern]

ok new to forums I found this thread while looking for an answer I have a g&g etu I just put into my gun after frying my old mosfet with an 11.1 lipo is my new g&g etu able to handel an 11.1 lipo with a 25c discharge rate thanks

 

[Anno]

ok new to forums I found this thread while looking for an answer I have a g&g etu I just put into my gun after frying my old mosfet with an 11.1 lipo is my new g&g etu able to handel an 11.1 lipo with a 25c discharge rate thanks

Hi Ciangovern,

I have had no problems using 11.1 lipo 25c with my ETU + Mosfet. I wouldn't use an 11.1 without a mosfet but that is just personal preference. I don't have enough knowledge to state on using it without.
 

 

[Sitting Duck]

new G2 ETU Mosfet being produced at half the size of old one

1s 3s & now 5s burst available:


bet I can still kill it - or it craps out under pressure

Think BTC Spectre or Gate Titan are not worried

(soz if I'm being a bit $hitty - I might be proven wrong, we shall see but it has taken them long enough & it still ain't released)