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January 16th, 2009, 14:23
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#1 |
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aka coachster
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MP5 SD mechbox parts recommendations
I bought a used and upgraded TM V2 mechbox and was putting together my frankenMP5 last night when I had a bad piston lock up. Nothing would release it. Battery was fully charged and worked fine previously. Couldn't press in the piston from the nozzle either. Ended up opening it up to free the spring to avoid having to get a new one.
So I find the following: Deepfire polycarb piston, full teeth, but one tooth seems to be cut off or missing. No debris in the box. Modify high torque modular gearset Unknown cylinder Unknown cylinder head Unknown spring Possibly stock nozzle or modify nozzle Unknown tappet and selector plates, could be stock possibly Now that the box is all apart, I'd like some suggestions on what to add or change. I plan to keep the Modify torque gear set but am unsure of what to get next. This is going to be a CQB primary but I'll probably use it on occasion out doors. It will have an inner barrel no longer than 229mm since the suppressor I use is a tracer unit and would like it to remain functional. So looking for suggestions on which piston, cylinder head, nozzle and maybe a new spring. Thinking about the sorbo head but also would the systema silent head work in this application? Last edited by coach; January 16th, 2009 at 14:29.. |
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January 16th, 2009, 16:00
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#2 |
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Official ASC Bladesmith
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Get Modify everything, polycarb piston (like the BEST quality piston I've come across yet), standard ported pistonhead, bearing spring guide and 90 spring (I get ~330-340fps out of my MP5A5). And get a Guarder clear hop up rubber as well. All can be had through Jugglez. I dont' see a lot of reason to change the cylinder or cylinder head, you can if you like but still. What does the cylinder look like?
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January 16th, 2009, 16:05
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#3 |
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Buy Element parts from my shop
__________________
 Airsoft Sales and Repair/Upgrade Services |
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January 16th, 2009, 16:16
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#4 | |
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aka coachster
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Quote:
Chances are I'm going to be paying Jugglez a visit this weekend anyway. I'll just ignore his hand in my wallet as I stock up on parts.
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January 16th, 2009, 16:17
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#5 | |
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aka coachster
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Quote:
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January 17th, 2009, 13:15
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#6 |
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aka coachster
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Alright. I had some time this morning to clean the parts and pull them all out of the mechbox. Here are some pictures.
Piston:   After cleaning it up, it looks more like someone tried to cut that tooth out. Is that a common mod for high torque? I thought that was done to high speed setups. The following 3 images show other damage on the teeth: http://i282.photobucket.com/albums/k...C/IMG_2238.jpg http://i282.photobucket.com/albums/k...C/IMG_2237.jpg http://i282.photobucket.com/albums/k...C/IMG_2224.jpg Spring guide: Possibly Modify?  Spring. If the guide is Modify, I'll assume the spring is too: http://i282.photobucket.com/albums/k...C/IMG_2236.jpg Stock nozzle: http://i282.photobucket.com/albums/k...C/IMG_2233.jpg Cylinder/tappet: http://i282.photobucket.com/albums/k...C/IMG_2230.jpg Selector: stock? contacts need some cleaning http://i282.photobucket.com/albums/k...C/IMG_2240.jpg http://i282.photobucket.com/albums/k...C/IMG_2241.jpg Empty box: http://i282.photobucket.com/albums/k...C/IMG_2234.jpg Modify High Torque Modular Gearset: http://i282.photobucket.com/albums/k...C/IMG_2226.jpg So I definitely want to replace that piston but now am unsure as to which one to get. I'll stick with Modify but need some direction as to what's better for me. Regular polycarb full teeth, ultra or ultra special? (or even the deepfire titanium?) Jugglez seems to be out of stock of V2 modify pistons so I may just pick up the cylinder set unless someone can suggest getting the ultra or ultra - special piston. Then I'll change directions and get that with the systema silent head set and reuse the old cylinder |
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January 17th, 2009, 14:01
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#7 |
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Official ASC Bladesmith
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Avoid any Deep Fire parts, they suck. Even the titanium piston will develope cracks around the groove where the teeth fit in......... even within a few hundred cycles. Foudn that out with a CA M249 I have in my basement that I'd been working on, new piston, test cycling and such.............. cracked piston. Get whatever Modify piston you feel like, the standard version is awesome.
Oh, the tooth missing, that is what caused the piston to retract and jam, the sector gear mismeshed since it grabbed the second tooth and the spring compressed fully preventing the gear from releasing the piston. Keep the bearing spring guide, cylinder is stock something, likely TM, no reason to change it or the head. |
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January 17th, 2009, 14:08
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#8 |
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aka coachster
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Thank you sir! Very much appreciated information, direction and suggestions.
I'll probably decide when I'm perusing and ogling the mountains of goodies at Jugglez place tomorrow. Will be either the Modify set or the systema set and standard piston. |
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January 17th, 2009, 19:28
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#9 |
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aka coachster
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forgot the piston head.
 sorbo pad was installed off center and has fallen off since this was taken. 
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January 17th, 2009, 19:39
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#10 |
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Am I seeing things, or did the person install the sorbo pad on top of the existing rubber pad? One's suppose to remove the existing padding... I can't even imagine what the AoE would look like, though it does explain why he'd take the second teeth off.
__________________
"The Bird of Hermes is My Name, Eating My Wings to Make Me Tame." |
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January 17th, 2009, 20:16
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#11 | |
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aka coachster
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Quote:
 I'm actually glad that it seized up and I had to open it up. Gives me an opportunity to make it solid. Still debating though: Modify Cylinder Set + sorbo or Modify piston, nozzle + Systema silent head set Price wise both are in the same ballpark but I'll have to reuse the cylinder with the 2nd option and have no sorbo options. Are sorbo piston heads and sorbo cylinder pads meant to be used together? Or is only one or the other only necessary? Old piston head: notice the bits of sorbo pad lodged inside. 
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January 17th, 2009, 20:17
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#12 |
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Tys
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Just my thoughts...
1. Modify polycarbonate full tooth piston 2. I wish you took a pic of the piston head...if you don't want to sweat it, just get a modify vented polycarbonate bearing piston head. 3. Consider tossing that cylinder hear (the only thing I haven't had 100% sucess with Modify parts are their cylinder heads...a couple of times, they haven't fit mechboxes nicely). 4. Consider getting a new Modify airseal nozzle...they're not expensive and now's the only time you can swap it out 5. How's the tappet plate? Worn/gouged/no-cracks Best of luck, Tys |
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January 17th, 2009, 20:20
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#13 | |
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Quote:
__________________
"The Bird of Hermes is My Name, Eating My Wings to Make Me Tame." |
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January 17th, 2009, 20:24
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#14 | ||
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aka coachster
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Quote:
 Tappet appears fine but I'll check again. I've read that the systema silent isn't all that silent so I may just stick with the Modify cylinder set and get a new sorbo pad. Only reason to get the set is that Jugglez doesn't have a V2 cylinder head in stock. Quote:
any benefit from using both over? Last edited by coach; January 17th, 2009 at 20:36.. |
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January 17th, 2009, 20:54
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#15 |
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Tys
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Personally...I swear by the systema silent head sets. They're not silent...but, personally, I feel that they do significantly "soften" the shock transmitted to the mechbox and they do "quiet" the noise a bit.
There's others that are supposed to be even quieter (i.e. angel silent head)...but I don't have any personal experience with them. Best of luck with your upgrades! Tys |
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