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Discussion Starter · #1 ·
What kind of Spring, Spring Guide, and Piston should I buy for my ECHO 1 ASR? I'd like 550 FPS, I already have a PDI Hopup, and an EDGI 6.01mm inner barrel.
Also, replace the cylinder head? or no?

I was looking at the Laylax ASP2 Spring set (Piston, Spring Guide, Spring) and wasn't sure if they'd be good for my gun.
 

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The cylinder head does not really need to be replaced as this does not typically break. Put some teflon tape on your stock head, grab yourself a laylax piston/accuracy cup, a laylax spring guide, and you should be good to go. I am still using the stock cylinder in my rifle, but at a much lower fps output.

As for the spring, I have heard great things about PDI, but I have a laylax spring in mine, and it works fine.
 

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I am running a PSS 210 spring, PSS Piston, PSS Piston head, PSS APS Spring guide. The only stock parts I have are the cylinder body, cylinder head, bolt handle and trigger assembly. On the front end I have an APS Aero chamber and a Madbull AK length V2 barrel (6.03 teflon coated). I'm shooting 580-600 depending on BB weight and have had no issues with my sears.
 

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PDI>APS Aero.

For power, it depends on the compression. I use an m150 and get 550+ fps with the PDI chamber. I have a friend who does not take care of his gun at all, and he gets around 400 with an m150.

If you seal off the cylinder head, make sure the head engages the bucking, etc., then an m170 should do you fine, I don't know about the cylinder volume etc. on the ASR, but if it is anything like the Type 96, even an m160 should work great.
 

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From what I have seen, any hop up chamber can be equal to another, it just depends how much work you want to do. I put a custom made nub in mine that helped a lot. The only reason I would do a PDI over the aero is that the PDI is made for the L96 barrel and the Aero is not.

As far as the spring goes it depends on both the compression and the barrel size. If I went to a 6.01 like yours then I'd probably be around 630 easy, just because of less tolerance. If you do enough reading on BBs and airsoft ballistics you will find that the generally accepted margin is about 0.08 tolerance between BB and barrel size, for spring guns; HPA/CO2 is a whole other world.

What are you chronoing right now? What custom work have you done to your cylinder? I would do all the mods and upgrades you want to do first, then replace the spring last. You can gain a lot of FPS by just making proper seals and tuning your cylinder and hop up for the proper spacing and sealing everything first. If I remember correctly my ASR was shooting about 450 out of the box, and if you have the Echo1 upgrade kit and the 6.01 barrel, it would not be a stretch to make it to 550 by just tuning your current set up and using the spring that you have.

Edit:
As an after-thought, you might want to consider why you want to go to ~550. There are some very effective sniper rifles on this forum that are only around 400-450. The only reason my ASR is as hot as it is, is because I only use that one for backyard games and the field that we normally play is large and everyone with an AEG shoots hot anyway. In normal games I use my G36 DMR (in the gallery) that only chronos around 430.
 

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As I stated in Bob's thread, Ive got the Upgrade kit from Echo1 and I have had no problems with my sears.

Hoggie, you stated earlier that a friend of your fathers made you a custom steel sear set. So you shouldnt have to worry at all.

My ASR is shooting about 540 fps and reaching out easily and accuratly to about 240ft. Im shooting Madbull .30g bbs that have been washed and stored properly.

Compared to my Well G96D that shoots about 577fps, my ASR is WAY more accurate. So that tells me that FPS isnt everything.
 

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I have an TM AK Beta that shoots 320fps and can reach 200ft consistently and accurately... FPS is only one component in the "COMPRESSION Algorithm."In AirSoft Marksmanship it has always been about how well you utilize the air you have to its greatest efficiency.
 

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Discussion Starter · #12 ·
I have not done any custom work expect for barrel spacers + taping the barrel to keep them in place. I'm planning on ripping the gun apart this weekend and adding some form of air compression.
"As an after-thought, you might want to consider why you want to go to ~550." - Bob, I can't shoot over 550 as it is Michigan's FPS rule (Correct me if I am wrong) and my fields FPS rule.
My plan for this work:
Compression of some short (?)
Making sure that little O Ring is still in there.
Zero'ing my gun in
New hop-up placement screw - Ronin, if you know where to get that screw that holds the hop-up in place, could you shoot me a PM? I need one badly.
Clean my barrel
Wash my BB's
Hop-up adjust. Any tips or tricks?

If anyone has any suggestions, let me know.
 

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Discussion Starter · #13 ·
bobgengeskahn said:
If I remember correctly my ASR was shooting about 450 out of the box, and if you have the Echo1 upgrade kit and the 6.01 barrel, it would not be a stretch to make it to 550 by just tuning your current set up and using the spring that you have.
I'm rechronoing this weekend. I got really inaccurate numbers last time. So you don't think that that's enough to stretch to 550?
 

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hoggie said:
Bob, I can't shoot over 550 as it is Michigan's FPS rule (Correct me if I am wrong) and my fields FPS rule.
Michigan rules are 550.9 fps or below.

If you come down to Ohio to play, some of our fields allow 600 fps or below to bolt action rifles, or 500 fps and below for semi auto rifles. However, you must be over 18 to use a rifle in excess of 400 FPS.
 
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