My First Build!

[Lex Dangler]

Hello peops, so, I've just completed my first build. All seems to be working well but the ROF is a little lower than I expected, I'm getting 14.5 rps from shs 13:1 gears and a jg blue motor on a 7.4 lipo. Does that sound about right or should I be getting more? If so, any ideas what might be wrong/need tweaking? 

Many thanks in advance ? 

 

[DerDer]

That does seem a bit low. With regards the 7.4 lipo what C rating and Mah is it?

Might be the culprit. 

 

[Lex Dangler]

Thanks for your response DerDer! It's a nuprol 30c 1450mah

The motor is second hand, could that be something to do with it? 

 

[DerDer]

Thanks for your response DerDer! It's a nuprol 30c 1450mah

The motor is second hand, could that be something to do with it? 

Those battery specs are good. The motor might be on the way out.

One last question what kind of spring have you got or alternatively what sort of FPS? 

 

[Lex Dangler]

It's a pdi 150 I think

FPS is around 340

 

[Iceni]

Assuming you are building to 350fps.

The JG blue isn't know for it's speed or power. It's a cheap balanced motor, That is probably having a mid life crisis over the 13:1 gear set

Any decent high torque motor should be an upgrade from what you are currently getting in terms of RPS. Even a cheap HT motor should net some good returns on that front. You will have to be careful tho, and willing to potentially open the gearbox again to make some DIY modifications to the sector gear depending on how high you want to go with the RPS.

My favourite 13:1 build runs an ASG CNC ultimate 30,000 motor. To get it to run you will need to remove a couple of teeth from the sector, Effectively short stroking the gearbox slightly, then run a slightly more powerful spring that then gets cut to make the correct FPS. My gun with that build runs 7.4v 2200mAh 25/50c batteries and gets 25rps.

If you want something cheaper than the ASG have a look at cheaper 16TPA motors. ZCI, SHS, Rocket airsoft all make suitable motors.

The SHS/RA or ZCI M110 with a coil or two cut off should be about there in terms of FPS, but it would depend on your base gun and just how good your airseals are.

 

[Lex Dangler]

Thanks for the info! 

I'm not looking for a high speed build in particular, I was just expecting this to be faster than it turned out and am worried I might have done something wrong. Could I have shimmed too tight for example? 

I have a sorbo in there and have removed a tooth and a half from the piston rack, would that not reduce the travel slightly? Thus speeding up the cycle rate slightly? 

If I were to change the motor would I not have to reshim the gears to it? 

Okay, update! I've just dropped in a brand new and fully charged 7.4 lipo, 1450mah, 30c. Now I'm hitting 16.7 rps, is that what I should be expecting? 

 

[DerDer]

Yeah, new motor will usually require a new shimming job.

If you're happy enough with the performance now, could keep it as is now and replace the motor down the line?

 

[Lex Dangler]

I've just dropped in a brand new and fully charged 7.4 lipo, 1450mah, 30c. Now I'm hitting 16.7 rps, is that what I should be expecting? 

 

[Lex Dangler]

If you're interested ?‍ 

View attachment 65994

 

[Sitting Duck]

The performance now @ 16.7rps is probably about right for spec of motor...

JG blue/black is supposed to be a 22tpa so a slight smidge quicker than most stock motors

(probably 22tpa is 22k motor)

(a little behind an ICS which is supposed to be about 19/20 tpa, but still slightly better)

(ICS 2000 say is about 25k)

most stock motors tend to be 26~27tpa a whisper more torque but weak ferrite magnets

mean these motors can stall easy if old/dirty and attempt to pull stronger springs/pre-cocked

However motor is s/hand and likely a bit of carbon on it, so robbed you of hit maybe 17~17.5rps

and you wouldn't get a massive amount more even with thick rewire, no breaks etc....

(you'd never really break the 20rps barrier - close to it but just wouldn't on 7.4v 340fps

well you might hit 21rps if you could get excellent seals, m95 or so with a creepy long tight barrel etc...

but that would be with everything going your way, massive wind behind you and ton of luck)

realistically nah, 17.5rps there abouts is about limit of what you can squeeze out

So where you are is about right-ish all things considered imho

you could squeeze a bit more out going the extra mile - but not a MASSIVE amount

What you "could" have done....

if your gun was shooting @ say lame 12~13rps on 7.4v

then see if you can add a flyback diode on the motor then run on 11.1v

(reduces the arcing at switch for non-mosfet guns)

then you would go from 12~13 rps to say 19rps, perhaps nudge 20rps on 11.1v

a quick boost - diode should be fitted if no mosfet though, for little time/work

What is the gun anyway ???

coz some guns need a bit more attention to some areas than others

G&G std piston head is shit full stop

Cyma cylinder head is crap, piston is good but o-ring must be replaced

JG on the other hand have pretty good std seals/compression by comparison

so if/when you open the box you check this crap to attain best possible efficiency

(which once improved means better energy so more power less strain = better performance)

This is how you attain max/better performance all round than simply drop beefy motor/gears/spring in

Not bad numbers, could have got a smidge higher, if you gone nutz with OCD like moi

but sceptical if I could break the 20rps barrier - even going to town on it with 7.4v on motor

industrial wiring, no breaks, perfect seals, mosfet, deans etc... 30c 7.4v etc.....

NB: I presume you are using deans on the gun ???

my rambling brought up the connection and unsure as Nuprol's seem to come with Small Tamiya

Upgrading to deans will add 1rps more over Small Tamiya

& will be a slight choke point/resistance area if still using & expecting more performance

again what gun - as some guns have micro-switches than regular trolley switches

and those guns really do need a mosfet if looking to run 11.1v or more demanding stuff/motors

But yeah - hope you got deans on the gun if looking for max efficiency/zest in ya build

(coz tamiya do rob ya a bit in terms of performance)

so get somebody who can solder to swap to deans if you are still on ST connectors

EDIT - Ares

Did you have to put a magnet in sector gear for ECU thingy ???

wiring should be OK - is it on deans already ???

if it is ECU - well imho these extra circuit bollox do nick a little bit of juice

the max rof on old school guns is often a whisker higher

as the electric bollox is drawing a little current offset by added features from unit

barrel is say 275 aprox, so need a m105-ish spring, maybe a faded m110

(roughly speaking, depends on stroke/port, spacers in piston, spring guide blah x 3)

pdi 150 is more like a m120 so if used a stronger spring that robs you of rps

(at least another round per second, maybe a bit more even)

all these things add up in the end, adding to load/efficiency of the gun

and effect its overall performance - but efficiency generally covers it all

(hence efficiency is an important foundation of unlocking gun's performance)

again not a bad result all things considered

we are all still learning and looking to squeeze out the absolute max efficiency

(as Tesco says - Every little helps)

 

[Lex Dangler]

The performance now @ 16.7rps is probably about right for spec of motor...

JG blue/black is supposed to be a 22tpa so a slight smidge quicker than most stock motors

(probably 22tpa is 22k motor)

(a little behind an ICS which is supposed to be about 19/20 tpa, but still slightly better)

(ICS 2000 say is about 25k)

most stock motors tend to be 26~27tpa a whisper more torque but weak ferrite magnets

mean these motors can stall easy if old/dirty and attempt to pull stronger springs/pre-cocked

However motor is s/hand and likely a bit of carbon on it, so robbed you of hit maybe 17~17.5rps

and you wouldn't get a massive amount more even with thick rewire, no breaks etc....

(you'd never really break the 20rps barrier - close to it but just wouldn't on 7.4v 340fps

well you might hit 21rps if you could get excellent seals, m95 or so with a creepy long tight barrel etc...

but that would be with everything going your way, massive wind behind you and ton of luck)

realistically nah, 17.5rps there abouts is about limit of what you can squeeze out

So where you are is about right-ish all things considered imho

you could squeeze a bit more out going the extra mile - but not a MASSIVE amount

What you "could" have done....

if your gun was shooting @ say lame 12~13rps on 7.4v

then see if you can add a flyback diode on the motor then run on 11.1v

(reduces the arcing at switch for non-mosfet guns)

then you would go from 12~13 rps to say 19rps, perhaps nudge 20rps on 11.1v

a quick boost - diode should be fitted if no mosfet though, for little time/work

What is the gun anyway ???

coz some guns need a bit more attention to some areas than others

G&G std piston head is shit full stop

Cyma cylinder head is crap, piston is good but o-ring must be replaced

JG on the other hand have pretty good std seals/compression by comparison

so if/when you open the box you check this crap to attain best possible efficiency

(which once improved means better energy so more power less strain = better performance)

This is how you attain max/better performance all round than simply drop beefy motor/gears/spring in

Not bad numbers, could have got a smidge higher, if you gone nutz with OCD like moi

but sceptical if I could break the 20rps barrier - even going to town on it with 7.4v on motor

industrial wiring, no breaks, perfect seals, mosfet, deans etc... 30c 7.4v etc.....

NB: I presume you are using deans on the gun ???

my rambling brought up the connection and unsure as Nuprol's seem to come with Small Tamiya

Upgrading to deans will add 1rps more over Small Tamiya

& will be a slight choke point/resistance area if still using & expecting more performance

again what gun - as some guns have micro-switches than regular trolley switches

and those guns really do need a mosfet if looking to run 11.1v or more demanding stuff/motors

But yeah - hope you got deans on the gun if looking for max efficiency/zest in ya build

(coz tamiya do rob ya a bit in terms of performance)

so get somebody who can solder to swap to deans if you are still on ST connectors

EDIT - Ares

Did you have to put a magnet in sector gear for ECU thingy ???

wiring should be OK - is it on deans already ???

if it is ECU - well imho these extra circuit bollox do nick a little bit of juice

the max rof on old school guns is often a whisker higher

as the electric bollox is drawing a little current offset by added features from unit

barrel is say 275 aprox, so need a m105-ish spring, maybe a faded m110

(roughly speaking, depends on stroke/port, spacers in piston, spring guide blah x 3)

pdi 150 is more like a m120 so if used a stronger spring that robs you of rps

(at least another round per second, maybe a bit more even)

all these things add up in the end, adding to load/efficiency of the gun

and effect its overall performance - but efficiency generally covers it all

(hence efficiency is an important foundation of unlocking gun's performance)

again not a bad result all things considered

we are all still learning and looking to squeeze out the absolute max efficiency

(as Tesco says - Every little helps)

Thanks for all that information dude! Very helpful! 

It's a g&p magpul receiver. 

lonex gearbox, 8mm bearings, bearing spring guide, red piston, piston head, sorbo pad, type D cylinder, cylinder head, nozzle, Tappet plate etc. 

Pdi 150.

Shs 13:1 with sector chip. 

Jg blue motor.

300mm madbull black python 6.03. Prowin hop.

Jefftron leviathan. 

Dean's.

I'm a bit of a perfectionist, took my time shimming, pretty confident that's bang on and air seal is perfect ??

Cylinder is ported and sorbo reduces volume a touch I guess, so the pdi 150 is to bring the fps back up to around 350. I reckon from what you've said I'm probably near the money? 

One weird thing I noticed was applying hop increased fps, shouldn't it decrease it? 

Oh, bucking is prommy purple and nub is firefly btw

 

[Sitting Duck]

Thanks for all that information dude! Very helpful! 

It's a g&p magpul receiver. 

lonex gearbox, 8mm bearings, bearing spring guide, red piston, piston head, sorbo pad, type D cylinder, cylinder head, nozzle, Tappet plate etc. 

Pdi 150.

Shs 13:1 with sector chip. 

Jg blue motor.

300mm madbull black python 6.03. Prowin hop.

Jefftron leviathan. 

Dean's.

I'm a bit of a perfectionist, took my time shimming, pretty confident that's bang on and air seal is perfect ??

So you got deans, but like I said my gut personal feeling is the fancy ECU bollox do skim a smidge off

the only possible area is the motor had a bit of carbon build up on it being s/hand

which (no offense btw), is kinda weird you spent all that time/money

but then went for a s/hand motor (black ferrite or silver neodym magnets ???)

if you was using SHS gears then just use a SHS HT motor is a general rule of thumb

as they will mesh well though the shimming of bevel to pinion is slightly different to present JG perhaps

not very different in way/angle the pinion is cut, but could still be a smidge different as all pinions go

if you drop a SHS HT in there you should be up to around 23/24rps

and depending if you have alter the motor height much will indicate if you need to really re-shim bevel

but the performance isn't that bad

normally I aim for hitting near 19/20 coz less chance of releasing trigger too early leaving COL raised (semi)

As you got bells whistles, the gun will always complete cycle no matter what in semi etc...

and the response can be improved with a bit of fancy pre-cock if motor is OK with it

(might struggle with insane pre-cock, but test/adjust for best response with JG)

nice gun/build, but did you run out of money for motor with Chrimbo approaching ???

just kidding

hop thingy is probably it bedding in I expect

(or you got piss poor mixed weight bb's)

 

[Lex Dangler]

So you got deans, but like I said my gut personal feeling is the fancy ECU bollox do skim a smidge off

the only possible area is the motor had a bit of carbon build up on it being s/hand

which (no offense btw), is kinda weird you spent all that time/money

but then went for a s/hand motor (black ferrite or silver neodym magnets ???)

if you was using SHS gears then just use a SHS HT motor is a general rule of thumb

as they will mesh well though the shimming of bevel to pinion is slightly different to present JG perhaps

not very different in way/angle the pinion is cut, but could still be a smidge different as all pinions go

if you drop a SHS HT in there you should be up to around 23/24rps

and depending if you have alter the motor height much will indicate if you need to really re-shim bevel

but the performance isn't that bad

normally I aim for hitting near 19/20 coz less chance of releasing trigger too early leaving COL raised (semi)

As you got bells whistles, the gun will always complete cycle no matter what in semi etc...

and the response can be improved with a bit of fancy pre-cock if motor is OK with it

(might struggle with insane pre-cock, but test/adjust for best response with JG)

nice gun/build, but did you run out of money for motor with Chrimbo approaching ???

just kidding

hop thingy is probably it bedding in I expect

(or you got piss poor mixed weight bb's)

Ha, the majority of the bits are second hand, bought here or there and cannibalised from other guns. Only the leviathan is new, I did try to drop in a titan I pinched from another gun but had issues with the optical sensors, maybe because of the shiny gearbox ?‍ so opted for micro switches instead. 

No need to mess about with pre cock, response is already incredible! 

I'll invest in an shs ht and if I have to reshim I might swap out the gear set for 12:1 from the gun that had the titan in it, they're in really good nick. 

I do have a couple of other motors from other guns, an asg U22000, a g&p but I have no idea what one, no stickers ?‍ and.. Oh! I've got a rocket high torque! It's new too, got it with a bunch of spare upgrade parts someone was selling. Isn't that the same as shs? 

 

[Sitting Duck]

Ha, the majority of the bits are second hand, bought here or there and cannibalised from other guns. Only the leviathan is new, I did try to drop in a titan I pinched from another gun but had issues with the optical sensors, maybe because of the shiny gearbox ?‍ so opted for micro switches instead. 

No need to mess about with pre cock, response is already incredible! 

I'll invest in an shs ht and if I have to reshim I might swap out the gear set for 12:1 from the gun that had the titan in it, they're in really good nick. 

I do have a couple of other motors from other guns, an asg U22000, a g&p but I have no idea what one, no stickers ?‍ and.. Oh! I've got a rocket high torque! It's new too, got it with a bunch of spare upgrade parts someone was selling. Isn't that the same as shs? 

Rocket's are supposed to be same or nigh on as SHS HT

Originally green, think they might be slightly slower say 28k than 30k

though manufacturing variations exist from these high precision sweatshops

there have been revisions to Rockets - now have vents on some motor cans

but they are believed to be about 28~30k like SHS HT's

SHS HT's vary, they used to have the wolf on them but now a logo for a number of years

something between 25k to say 33k is quite popular for a godd trade off in power/response

without draining your battery asap like insane High Speed motors tend to do

12:1 over 13:1 is fuck all really, the aprox 8% change in ratio drops to say 5% due to slight increase to load

so if 13:1 rolls ok with motor of choice I'd be in no rush to change much

I mean you could mess with a slower 9t bevel - or change a 9t for a quicker 10t bevel

but usually most sets come with 10t bevels, though SHS do list sets with 9t in them

(majority are 10t bevels, people change to 9t for a slightly slower, more torquey option

or if wanting a 13:1, really 13.5:1 to go to a 14.85:1 ratio if smidge too quick/straining)

nah fuck messing around with ultra fine tuning ratios that much

more important is how it runs than trying to go ultra nutz in a quest for that missing 1 or 2 rps extra

 

[Lex Dangler]

Rocket's are supposed to be same or nigh on as SHS HT

Originally green, think they might be slightly slower say 28k than 30k

though manufacturing variations exist from these high precision sweatshops

there have been revisions to Rockets - now have vents on some motor cans

but they are believed to be about 28~30k like SHS HT's

SHS HT's vary, they used to have the wolf on them but now a logo for a number of years

something between 25k to say 33k is quite popular for a godd trade off in power/response

without draining your battery asap like insane High Speed motors tend to do

12:1 over 13:1 is fuck all really, the aprox 8% change in ratio drops to say 5% due to slight increase to load

so if 13:1 rolls ok with motor of choice I'd be in no rush to change much

I mean you could mess with a slower 9t bevel - or change a 9t for a quicker 10t bevel

but usually most sets come with 10t bevels, though SHS do list sets with 9t in them

(majority are 10t bevels, people change to 9t for a slightly slower, more torquey option

or if wanting a 13:1, really 13.5:1 to go to a 14.85:1 ratio if smidge too quick/straining)

nah fuck messing around with ultra fine tuning ratios that much

more important is how it runs than trying to go ultra nutz in a quest for that missing 1 or 2 rps extra

Thanks for all your help and information dude, It's really appreciated!

I had no idea about the 9/10 tooth bevel, I know the gearset I have installed is maybe five years old, could that indicate it's a 9? It's barely been used though from the look of it despite it's age. 

I basically want to build the best possible gun from the parts I have available and it seems that the motor is the only thing that's falling short. 

These are the other motors, is one going to suit my build better than the jg blue?  

View attachment 66009

View attachment 66010

View attachment 66011

On another note! What's the better hop between the prowin and maxx? 

 

[Sitting Duck]

Thanks for all your help and information dude, It's really appreciated!

I had no idea about the 9/10 tooth bevel, I know the gearset I have installed is maybe five years old, could that indicate it's a 9? It's barely been used though from the look of it despite it's age. 

I basically want to build the best possible gun from the parts I have available and it seems that the motor is the only thing that's falling short. 

These are the other motors, is one going to suit my build better than the jg blue?  

View attachment 66009

View attachment 66010

View attachment 66011

On another note! What's the better hop between the prowin and maxx? 

Rocket will offer more performance/rof

may draw say 15a on a auto burst say

where as the ASG is going to draw less amps, deplete battery less, run bit cooler

3rd motor - I can't place it so can't say how it compares

looks like it might have a mark/drill mark to balance armature like a decent motor

but unaware of spec/magnets/tpa to say where it might sit vs Rocket/ASG

the amp draw on what these fancy bollox ECU's might say in spec varies to a power meter

coz these fancy fuckers draw some current themselves & report differently to a simple power meter

so the estimated 15a is a RC Power Meter on auto burst - Titan/Jefftron may report differently

but you compare what the unit says for each motor than take as gospel my figures from these...

View attachment 66013

One possible minor issue is with these G&G/SHS type motors...

By that I mean the way the end bell is fitted, with a ferrous lockring

then 2 x usually m2.5 screws screw into the lockring from end bell cap

they should have a plastic washer under them to insulate the poles

(otherwise you effectively have a short or risk of shorting if washers fail)

The m2 or m2.5 bolts can fail to fully centre & have one side conducting

& if both conduct - well you are in for shock - excuse pun

Possibly why @ak2m4does mention a possible warning about using Active Breaking

in some builds like Titans/Jefftron's etc....

Advisory:I've been hearing reports of Gate Titan Adaptive Active Break function is causing motors to fail.  Please do not use this feature till you are sure it will not affect the motor.

View attachment 66014

Now what anybody who is experiencing this could try...

is to replace ONE of the screws with a PLASTIC m2.5 bolt

and/or ensure bolts are centred correctly no risk of touching brush plates

adding a better/thicker more robust plastic m2.5 washer if unsure

(reason for just ONE is that the neodym magnets will just pull the damn lockring downward

if you remove both and the length is a bastid to get exactly right to bite and pull the lockring up)

you can do both but just one will suffice to ensure no short risk across poles

think they are 2.5mm - though on some they are m2, usually m2.5 I think but does vary

TL-DR, it can be an issue on fancy ECU's if you use AB on "some" motors

(cheaper motors like JG, most stock motors and "maybe" ZCI 22tpa use "tabs"

at sides than 2 bolts/lockring, so no short risk on tabbed motors)

and I suspect it could be due to the lockring system allowing a risk of a short

which under AB where polarity is reversed to stop motor...

the flash bastid monitoring system of ECU is saying Houston we (might) have a problem...

(just my thoughts on these type of cans/motors - originally shorts were happening in flash

expensive Systema Motors a while back and there was a couple of fixes/work arounds

though anodised - it was the conductive bolts, brush plates & lockring causing the short

if any insulation failed or bolts touched the sides of brush plates etc...)

There was other stuff like a piece of insulation tape under plates - not needed for plastic ends

(nah really it was the screws shorting on lockring if not properly insulated - try 1 plastic bolt)

Anyway....

there are 8t, 9t (not sure about 11t but possible, and 12t bevels

but nigh on most are 10t bevels that are used as the std spec for bevels

minor alterations in gear ratio matters little in most cases

though the ratio is obviously a factor, but difference between 12:1 & 13:1

is like 16:1 (17.25:1 in most 16's) to 18:1's (18.65) - hardly any big massive difference

The Maxx is "likely" to be more compatible as Prowin can be picky for some people/builds

Both are not cheap - perhaps overpriced on the genuine ones (Prowin)

and snides can be a gamble

Plus you using prommy, which can have protruding bucking lips

and plop that in a Prowin and you could be looking at feed issues from bb catching on prommy lips

you wanna fuck about with stuff...

get this...

https://www.ak2m4.co.uk/internal-parts/hop-up-chambers/zci-rotary-hopup-chamber-plastic-m4

I recently bought a clone SHS Blue rotatry hop with a TWG order...

and on closer inspection the arm was different with a built in nub like pic shows...

ok not the blue plastic hop unit but arm is similar

yeah but that's good right ??? NO it ain't

that is hard plastic and I'm stuck with that nub on it

so if that hard plastic nub tears up a maple leaf or prommy or half decent bucking

leaving me stuck with it - I'm gonna be pissed, plus a softer nub option is best

rather - I'll fucking decide the nub and its hardness - thank you TWG

hopefully real SHS or ZCI rotary hops are still have the arc'd arms

View attachment 66015

so yeah, I'd be tempted to grab a ZCI one first and build a new hop,bucking,barrel combo

(leaving existing one intact in case you have issues)

fuck about with ANOTHER hop/barrel combo, leaving your existing working one as is

(in case you fuck shit up or tear bucking)

you don't HAVE to use all high end parts, usually they have better tolerances to them

but also care & attention to detail is in fact more important than always buying the higher end stuff

but watch out for prommy lips catching/fouling in some hop builds/combos

as always be careful just how much or how nutz you go all at once...

change what you NEED to, if it ain't broke & all that

otherwise you will be opening more & more cans of worms/issues to attend to

 

[Lex Dangler]

Rocket will offer more performance/rof

may draw say 15a on a auto burst say

where as the ASG is going to draw less amps, deplete battery less, run bit cooler

3rd motor - I can't place it so can't say how it compares

looks like it might have a mark/drill mark to balance armature like a decent motor

but unaware of spec/magnets/tpa to say where it might sit vs Rocket/ASG

the amp draw on what these fancy bollox ECU's might say in spec varies to a power meter

coz these fancy fuckers draw some current themselves & report differently to a simple power meter

so the estimated 15a is a RC Power Meter on auto burst - Titan/Jefftron may report differently

but you compare what the unit says for each motor than take as gospel my figures from these...

View attachment 66013

One possible minor issue is with these G&G/SHS type motors...

By that I mean the way the end bell is fitted, with a ferrous lockring

then 2 x usually m2.5 screws screw into the lockring from end bell cap

they should have a plastic washer under them to insulate the poles

(otherwise you effectively have a short or risk of shorting if washers fail)

The m2 or m2.5 bolts can fail to fully centre & have one side conducting

& if both conduct - well you are in for shock - excuse pun

Possibly why @ak2m4does mention a possible warning about using Active Breaking

in some builds like Titans/Jefftron's etc....

Advisory:I've been hearing reports of Gate Titan Adaptive Active Break function is causing motors to fail.  Please do not use this feature till you are sure it will not affect the motor.

View attachment 66014

Now what anybody who is experiencing this could try...

is to replace ONE of the screws with a PLASTIC m2.5 bolt

and/or ensure bolts are centred correctly no risk of touching brush plates

adding a better/thicker more robust plastic m2.5 washer if unsure

(reason for just ONE is that the neodym magnets will just pull the damn lockring downward

if you remove both and the length is a bastid to get exactly right to bite and pull the lockring up)

you can do both but just one will suffice to ensure no short risk across poles

think they are 2.5mm - though on some they are m2, usually m2.5 I think but does vary

TL-DR, it can be an issue on fancy ECU's if you use AB on "some" motors

(cheaper motors like JG, most stock motors and "maybe" ZCI 22tpa use "tabs"

at sides than 2 bolts/lockring, so no short risk on tabbed motors)

and I suspect it could be due to the lockring system allowing a risk of a short

which under AB where polarity is reversed to stop motor...

the flash bastid monitoring system of ECU is saying Houston we (might) have a problem...

(just my thoughts on these type of cans/motors - originally shorts were happening in flash

expensive Systema Motors a while back and there was a couple of fixes/work arounds

though anodised - it was the conductive bolts, brush plates & lockring causing the short

if any insulation failed or bolts touched the sides of brush plates etc...)

There was other stuff like a piece of insulation tape under plates - not needed for plastic ends

(nah really it was the screws shorting on lockring if not properly insulated - try 1 plastic bolt)

Anyway....

there are 8t, 9t (not sure about 11t but possible, and 12t bevels

but nigh on most are 10t bevels that are used as the std spec for bevels

minor alterations in gear ratio matters little in most cases

though the ratio is obviously a factor, but difference between 12:1 & 13:1

is like 16:1 (17.25:1 in most 16's) to 18:1's (18.65) - hardly any big massive difference

The Maxx is "likely" to be more compatible as Prowin can be picky for some people/builds

Both are not cheap - perhaps overpriced on the genuine ones (Prowin)

and snides can be a gamble

Plus you using prommy, which can have protruding bucking lips

and plop that in a Prowin and you could be looking at feed issues from bb catching on prommy lips

you wanna fuck about with stuff...

get this...

https://www.ak2m4.co.uk/internal-parts/hop-up-chambers/zci-rotary-hopup-chamber-plastic-m4

I recently bought a clone SHS Blue rotatry hop with a TWG order...

and on closer inspection the arm was different with a built in nub like pic shows...



ok not the blue plastic hop unit but arm is similar

yeah but that's good right ??? NO it ain't

that is hard plastic and I'm stuck with that nub on it

so if that hard plastic nub tears up a maple leaf or prommy or half decent bucking

leaving me stuck with it - I'm gonna be pissed, plus a softer nub option is best

rather - I'll fucking decide the nub and its hardness - thank you TWG

hopefully real SHS or ZCI rotary hops are still have the arc'd arms

View attachment 66015

so yeah, I'd be tempted to grab a ZCI one first and build a new hop,bucking,barrel combo

(leaving existing one intact in case you have issues)

fuck about with ANOTHER hop/barrel combo, leaving your existing working one as is

(in case you fuck shit up or tear bucking)

you don't HAVE to use all high end parts, usually they have better tolerances to them

but also care & attention to detail is in fact more important than always buying the higher end stuff

but watch out for prommy lips catching/fouling in some hop builds/combos

as always be careful just how much or how nutz you go all at once...

change what you NEED to, if it ain't broke & all that

otherwise you will be opening more & more cans of worms/issues to attend to

Blimey dude, you really know your stuff! Are you running on lipo and wired to deans? ?

I didn't particularly go for all high end parts, but I have them so I might as well use them! Basically my whole reason for doing this build was the challenge, I take everything apart, tinker and optimise, even a toaster! I had never attempted an aeg before, then lockdown happened so I thought I would give it a go, I bought a few upgraded second hand guns that needed some work but looked in good shape, figured that if they're a lot cheaper than new but with better parts I'd be better off and this gun was the result. I still have enough parts to build a second but want to optimise this one before I start on the next. 

I do have what I believe to be a stock g&p magpul sentry, apart from having a titan installed, it's where the third motor came from and having done some research I believe it is a g&p motor, and assuming it's stock, according to the spiel it's an m160. Not sure how that compares to the others. 

https://gpairsoft-uk.com/shop/en/50132-gp-airsoft-deluxe-sentry-magpul-gp-gp-dxe002.html

Until I crack it open I won't know for sure whether it is all stock but it has the original hop and barrel from the looks of it which I assume would be the first things to get changed.  

It does need to be opened up at some point as the selector is knackered and the gb would probably benefit from a regrease as it's not been used for a very long time.

My mottos are;

If it ain't broke, fix it 'til it is! 

And;

ALWAYS GO FULL RETARD!

 

[Davegolf]

I can vouch for the ASG CNC U22000.

Great cool running and economical motor, which is also very quiet.

On a 13:1 gear set with 350fps spring and 7.4V expect 16 RPS.

Which I think is about the perfect rate of fire, both in fire power lay down and the sound / realism.

Also with this motor, spring and gear ratio speed you will need very little active braking - which also saves battery power and extends the life of your motor.

The motor is very powerful and as such RPS will not change much if you add a stronger or weaker spring.

They are also extremely reliable.

I would fit a Lonex helical bevel set in there too - quieter and easier to setup.

 

[Lex Dangler]

Oh, the gun feeds perfectly by the way so I guess the hop/bucking are working well together, tbh I didn't actually do anything with that yet, just dropped it in as it came.

Unless that's what's causing fps to rise as hop is applied rather than fall? 

I can vouch for the ASG CNC U22000.

Great cool running and economical motor, which is also very quiet.

On a 13:1 gear set with 350fps spring and 7.4V expect 16 RPS.

Which I think is about the perfect rate of fire, both in fire power lay down and the sound / realism.

Also with this motor, spring and gear ratio speed you will need very little active braking - which also saves battery power and extends the life of your motor.

The motor is very powerful and as such RPS will not change much if you add a stronger or weaker spring.

They are also extremely reliable.

I would fit a Lonex helical bevel set in there too - quieter and easier to setup.

Thanks dude! I'll look into the lonex bevel! 

Tbh I'm a bit sceptical about using the U22000, when I took it out of the gun it came in there was a lot of copper residue in the motor grip, I'm assuming from the previous owner using active breaking? I wonder whether it could be damaged as a result? Although the gearset looks spanking new still so maybe it's not been used that much? 

I'm happy with 16rps, I just wanted to make sure that's what I should be getting and the gun is running efficiently.