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Post by Bishop (Task-Force Nightmare) on Mar 1, 2014 10:03:20 GMT -5
I was wondering for my A&K SR-25k what upgrade options I have. I found a piston on clandestine thats made for the extended gearbox but what other parts go with it?
Do V2 standard gear sets go with it? Stuff like that.
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ctres
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Post by ctres on Mar 1, 2014 10:29:33 GMT -5
You have a couple options when dealing with an extended gearbox. One would be to get an extended piston like the one you are talking about. If it is the SHS one on clandestine that would be a good pick. Since the extended piston has more teeth you would need an SR 25 specific gearset with extra teeth on the sector if you wanted the piston pulled all the way back. You could also just use a normal v2 gearset and it just wouldn't pull the piston back all the way, effectively short stroking the gun, which necessarily a bad thing at all unless you are trying to get maximum power out of a given spring. Another option is to use a standard gearset as well as standard piston and just make a spacer between the piston head and piston body so that the piston sits far enough back. This would have more or less the same result as an SR25 piston with a standard gearset. Some people used to do this before there were any worthwhile SR25 pistons on the market since it allowed the use of a proven standard piston. Other than that spring guides, piston heads, cylinder heads, etc should be compatible. The tappet is obviously longer but there shouldn't be any need to replace it anyways. I'm not sure about nozzles either, but IIRC extended shell SRs just use a standard M4 nozzle.
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Post by Bishop (Task-Force Nightmare) on Mar 1, 2014 10:59:20 GMT -5
Could I use my Seigtec gears but just keep the sector gear stock? And I was looking at the spectre Mosfet that wouldn't have any problems with an extended gearbox would it?
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ctres
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Post by ctres on Mar 1, 2014 11:16:28 GMT -5
What seigetek gears do you have? I don't know how else to phrase what I already said. If they are standard v2/3 gears you can use them. If it is an SR25 set you can also use them. If the A&K uses a standard v2 trigger switch and cutoff lever position then the spectre will work fine.
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Post by Bishop (Task-Force Nightmare) on Mar 1, 2014 11:50:48 GMT -5
Siegetek Ver.2&3 Balanced Gear Set ( 20.8 Ratio ). Yeah its a standard v2 trigger set up, Im gonna get one if they ever come back in stock.
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ctres
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Post by ctres on Mar 1, 2014 12:00:58 GMT -5
Yep that will work, though I honestly think anything above standard ratio (18:1) is a total waste, especially seigeteks since they can handle anything. You can run that gearset with the long SR piston but it will be like short stroking 3 teeth. You can also order gears individually from RiotSC so I think you could just get an SR25 sector to run with the rest of your set if you don't want to lose the FPS from short stroking.
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Post by Bishop (Task-Force Nightmare) on Mar 1, 2014 12:19:30 GMT -5
I got those gears before I really knew anything about teching in airsoft. I wish I would have gotten a lower ratio gear set. But im fine with the purchase, they're about a year and a half old and have no signs of ware on them.
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Post by Bishop (Task-Force Nightmare) on Mar 2, 2014 18:10:18 GMT -5
Does a dual sector gear benefit a semi auto set up in any way?
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ctres
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Post by ctres on Mar 2, 2014 19:06:46 GMT -5
Yes, it makes the cycle time much shorter than a full stroke but if you are getting a spectre there is no reason since precocking makes response instant (see my thread on it). Plus with a dsg your fps is usually fairly low due to the half stroke and the reduced cylinder volume will make it even worse. IMO a dsg has no place on an SR.
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Post by Bishop (Task-Force Nightmare) on Mar 2, 2014 19:17:14 GMT -5
I think im gonna get a lower ratio seigtek gearset with the spectre, have the piston coming in the mail along with a heavier spring too compensate for the loss of fps for the short stroke. Might pick up a speed trigger too to make the trigger pull even less.
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ctres
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Post by ctres on Mar 2, 2014 19:28:42 GMT -5
I guess if you are using precocking the higher ratio gears might not make much of a difference at least on the first shot. Follow-ups may be a little slower but if you run the gears you have with something like a JG blue or an SHS torque you might find it totally fine but I haven't experimented with any gear ratios other than 18:1, 16:1, and 10:1. If you are aprehensive then I'd say just get the spectre and try out precocking. If it's not enough then sell your gearset and get some 14:1s or even 10:1s if you plan on running a super slow motor like a frankentorque.
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Post by Bishop (Task-Force Nightmare) on Mar 2, 2014 19:35:24 GMT -5
Im running a JG Blue in it right now with the 20:8s. The trigger response isnt great but I have them shimmed well and height set and they work really well together.
But i think ill get a lower ratio for this build and keep the 20:8s for my other sr-25 build. Sent from my SCH-I535 using proboards
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Post by Bishop (Task-Force Nightmare) on May 22, 2014 19:45:13 GMT -5
BUMP need help! Does anyone know what Bushing Size the A&K SR-25 gearbox uses? I'm looking to upgrade them.
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Post by MayhemXXXFrosty (AndrewMp5k) on May 22, 2014 19:57:28 GMT -5
They seem like the standard 8mm, I'll double check for you though.
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Post by Bishop (Task-Force Nightmare) on May 22, 2014 20:39:37 GMT -5
Thanks for the life of me i couldn't find it on google. Also on my new Siegetek gears the biggest tooth on the sector gear looks shaven down. Like someone had grinded it down with a dremel and i never noticed it until now. Will that effect the performance of the gears ? Photobucket pixelated the hell out of it but you can still kind of see it. The thickest tooth is now the size of one of the regular teeth.
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