PSG-1 aluminum piston?
 

A quick question about the PSG-1.
I'm thinking of buying a PSG-1 in the future, after I have enough experience with gearboxes (I've heard that the version 4 is one of the hardest gearboxes to upgrade). I would want to upgrade it to its maximum potential.*Field legal*

Anyway, I was looking at the Systema FTK and was wondering if an aluminum piston would be any good. Yes, it will last longer than a polycarbonate one but it will put a lot of stress on the gearbox. (I know v4 gearboxes are supposed to be much stronger than v2's but how much stronger are they. After all, those gearboxes are hard to come across.)

In short, should I get a polycarb piston as not to put too much stress on the gearbox?

I want to get the following:
- G&G magnesium receiver
- Systema FTK

The FTK comes with an aluminum piston.

I've successfully installed the FTK with 12v batteries and 550fps springs in to PSG-1's before without breakage.

The silent head set the FTK comes with should take off a significant portion of the impact.

550fps?! Is that even field legal, heh heh.
Thanks for the info, but the FTK comes with bore-up kit AND a silent head set?

the one from uncompany.com
http://www.uncompany.com/pageproduct...sp?prodid=8781
it doesnt come with silent piston head, but it comes with everything else ull need

Yes it does.. look at the piston head in the package...

That's a silent piston head.

It's a bore up set - All Systema bore up sets use a bore-up silent head set.

Again, yes, it does come with the silent piston head, although it is bore-up size. It's not a standard silent head set.

Illusion, was the kit you installed the 300 or 400% kit for the 550fps set up ?

I wasn't aware there was more than one kit for the PSG-1.

All of the PSG-1 kits I've installed have been Systema FTK12, which contains the 300% spring.

Correct me if I'm misinformed with an official link.

Official reference:
http://www.systema-engineering.com/E...eproducts.html
Follow: "FTK > PSG-1"

G'day,
 

I bought a FTK last month, and it came with what can best be described as a 500% spring. Took two guys to compress it enough to fit into the mechbox. Nothing could pull it and it did terrible things to batteries. I've got a 200% spring in there now and all is well (if a little over the FPS limits here...).

Moral is to always plan for spring inconsistencies as it seems SystemA has dropped quality control in favour of PTW development.

Last year systema released the 400% kit. Same as the 300 but with a 400% spring.
http://www.redwolfairsoft.com/redwol...l?prodID=22866

Interesting that it came with the Magnum motor. I had installed a Magnum motor on one of my client's guns that I installed the FTK into, but the neodymium magnets on the thing are so powerful, that it is impossible to get the spring to release at the end of your shooting session. It literally held the spring cocked, even with the anti-reversal latch disengaged!

The only way to disengage the spring was to unscrew the pistol grip base at the end of each shooting session and literally let the motor "pop" off the gears, and thus, allowing the spring to release. Real PITA...

Who knows, maybe the 400% spring is strong enough to reverse the Magnum's drive shaft...

couldn't you just shoot semi? that leaves the piston in the forward position.

We're talking about PSG-1's here. Not standard AEGs.

The function is opposite, where the piston stays cocked in the off cycle. It allows for instantaneous shots on trigger pull. The wind up cycle occurs after the piston is released.

This is why PSG-1 upgrades require so much torque - being able to crank an already cocked spring from a resting position requires way more current and torque than normal functioning AEGs do.

The thing i'm worried about is how long that box will hold up with that 400% spring. I know that mechbox is pretty hard to find. What do you think they FPS would be on the 400 ? Probably would need a 12v or would a Lipo battery be enuff ?

I'll take a wild stab in the dark and say velocity will be 650fps.

Even with the 300% spring, I was powering it with a 12V and Systema Magnum motor. I'm sure the same setup can crank a 400% spring, but you'll definitely have some serious durability issues in the long run.

If you want velocities so high, why not just pick up a Tanaka M700 series bolt action rifle and install the G&G Power bolt? You'll easily hit 800fps with propane, and it'll save you tons of money and headaches.... it will also perform much better. Bolt actions are inherently more accurate and quieter. The only feature you lose is the semi-auto fire.

As a field gun, the PSG-1 is one of the worst guns to do up, due to the wobbly body and the inherent limitations of applying high velocity upgrades to the auto-electric system. I always tell this to all my clients who request to do the upgrade: Unless you REALLY LOVE the PSG-1, it's a lot of wasted money to achieve a goal that you can get elsewhere for better and cheaper. There's a certain coolness factor versus cost benefit ratio that needs to be weighed on the owner's mind.

As cool as I think the PSG-1 system is, I can't honestly see myself ever using that gun as a field gun.

G'day,
 

On a side note regarding voltage and PSG-1: With the 200% spring and a 10.8v custom battery, my PSG-1 would fire two round bursts. The innards were spinning so fast, the piston would fail to catch at the end of the cycle and fire a 2nd time. Next trigger pull would result in just cranking the piston back to firing position. So, 1st trigger pull = 1.5 cycles, 2nd pull = .5 cycle. It was fun, but we decided to remove the extra cells and now all is well with 8.4v. Just something to be aware of if you go with a custom battery.

What gears were you using for that upgrade?

What you're describing sounds like a problem you'd get with standard ratio gears with too much voltage. What happens is that the increased ROF will cause the motor to overtorque and because the spring is not excessively heavy, it doesn't stop the overtorqued gears, and thus, rotating past the stop point.

It's an imbalanced setup.

G'day,
 

The gears that came in the FTK. and yep, that's exactly what was happening.

I actually love the PSG1 and thus the reason I bought this long ago. I've already upgraded the gears, air nozzle, 180% spring and the old Systema torque up motor for 402fps. I'd just like a little more out of it. I'm not looking for crazy fps just something around the 500 to 550 level. As far as the battery goes, I hooked up my 10.8v from my M4 to it and sometimes it had trouble compressing the spring. My 9.6v will not compress the spring at all.

Oh, ive never worked on a PSG-1 before. Thats a pretty smart way of making an AEG sniper.

I never ran the 200% setup with a battery past 8.4v before, so I wasn't aware that would happen. I just knew that 200% springs with the infinity torque up gears that come with the FTK would be overkill, and extra voltage wouldn't be required.

The 200% spring should be at the strength level where you could almost get away with running standard ratio gears.

If you're going to push the velocity up that high, I highly recommend you installing a MOSFET. If you don't, you're going to burn holes in to your switch assembly due to the huge electrical arcing that occurs with current draw that large.
Once you burn out your switch contacts... good luck getting a replacement. :P

G'day,
 

Again: Yep.

I went with the extra voltage to gain the quickest possible 2nd shot with the idea of trying to engage mulitple targets before getting hosed down. It worked a little TOO fast. P-ha! 8.4 is more than enough, and less hassle than cramming in a larger battery.

Yeah i've already planned on getting a MOSFET and i'm ordering a Guarder anti heat selector switch to replace my stock one. Would the systema torque up motor I have be efficient with the 300% spring ?

Yeah, it should be fine.

Damn, I didn't think there would be so much info on my thread, thanks guys.
I'm saving up for my very own PSG-1 and school's out next month so this should be a good summer. (Hooray for Cégep!)