So I find a sweet CYMA Ak 74 but it shoots at roughly 330 FPS. I want something more powerful at around 370-390 FPS. Can anyone recommend me one that sells on Evike.com because I'm ordering from evike.
Let me show you this one but I think that it will be a bit powerful.... http://www.airsoftpost.com/product_i...ducts_id=31461
A PDI 150 will put you in the high 300's, and hopefully not put you over 400.
A PDI 140 will put you right around 350.
Is there a problem with your gun shooting 330 FPS? At that speed, you can enjoy a closer 25 foot engagement distance, instead of the 35 foot your are going to have with a 350+FPS gun.
I'd leave it alone.
If you want better accuracy/range, I'd suggest a tightbore barrel. This will up your FPS a bit due to tighter compression, but it has the more desirable effects of better long-range capability. A higher FPS spring will give you this, but not as much as a TB and it's really more of a brute-force solution.
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Quote:
Originally Posted by Jose
If you want better accuracy/range, I'd suggest a tightbore barrel. This will up your FPS a bit due to tighter compression, but it has the more desirable effects of better long-range capability. A higher FPS spring will give you this, but not as much as a TB and it's really more of a brute-force solution.
Exactly, improve your compression first, as that just utilizes what you already have, and it doesn't add to the strain on your gun.
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Quote:
Originally Posted by 12and2
Hi, speaking of springs, what spring is good to get my gun under 350?
PDI 140%, and rarely... a PDI 150% will work
or alternatively to PDI an m100 would probably work, all guns are different though
(Make sure you don't buy a sparkley spring, the paint will just wear off and coat your gearbox in shiny dust)
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Last edited by GeneralPoraboo : 06-09-2010 at 09:09 PM.
Reason: Automerged Doublepost
I'm using a G&G M4 (long barrel) does that help narrow down spring choices?
Barrel length has very little to do with spring choice.
A quick search of the forums revealed a thread entitled "Spring Chart." Simply find the FPS you want and reference a spring. Be advised that there are other factors that govern how well your gun performs, so don't simply "add more spring" until you get the desired FPS. If you put an M120 (120 meters per second w/.20g BBs) in your gun, and it's shooting 220 FPS, you have other problems. If it's shooting 380 FPS...not so much.
I will say that FPS will NOT make you a better player, nor will it give you a tremendous advantage on the field. I think high FPS makes less experienced players dangerous. If you screw up and shoot me too close with a gun shooting 330, my attitude will be to tell you to watch your engagement distances and try harder. Swap that with a 400 FPS gun and you are getting sent home.
PRACTICE will make you a better player. PRACTICE and TEAMWORK will give you a decided advantage on the field, but you can't buy either of them or get them from playing video games. You can dump tons of money into your gun, and if you suck, you'll still suck, you will just suck with a faster gun. One of our most effective players was on the field for two years with an AEG that shot 220 FPS. Anyone that has played with him will tell you that he dominated the field. This was possible because he was a sneaky bastard and worked hard at being a good player, not because of a metal body or 399.995 FPS.
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Quote:
Originally Posted by P7hk9
399.995 FPS.
I had a CO2 pistol that shot that fast...it sucked
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Earlier this year I did a science project with my nephew. We built a launching platform for those cheap balsa wood gliders with the theory of the more tension we put on the launching rubber band the more force it would fly with, the farther it would go... didn't quite work that way. We forgot about a little thing call wind resistance... after a point the more tension we put into the rubber band the shorter the distance it went. We had not taken into account a little thing called wind resistance. Eventually, at least to my layman's understanding, the plane didn't have enough mass to overcome the wind resistance and it was basically like slamming into a wall of air.
Your AEG using .20 pellets is going to run into the same thing... as your FPS increases, so will the wind resistance, to the point where your velocity increases will be lost in a matter of feet. Doing a little research, your better bet is to use a heavier pellet .25 for example which will have the mass to overcome a greater amount of wind resistance and actually travel further and straighter... one of the reasons why the snipers use heavier pellets. I did a Google search on this and found a couple of posts out there that give all the math and the physics. Remember a big part of your gun is the hop up system, it's putting spin on the pellet, so in essence you are floating it out there. What happens if you throw a paper airplane with all your might?
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Quote:
Originally Posted by Palafoxx
That's PDI 150, not SP150. I have no idea what that is.
SP150 is how guarder rates their springs...I believe they use the Meters/second rating too, cause their SP150 is like 500 FPS.
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Yes, if the prefix is an 'M' or 'SP' it means meters per second...
Just multiply that number by 3.28 and you have fps
Also I suggest keeping your fps under 330 because when you add around 10% more fps that is like 25% less usage time.... I know just random numbers but just trying to show you the point don't upgrade fps unless your internals are upgraded also.
Increase your compression and air loss through a tb and better piston/ head and you can gain a good amount of fps and increase accuracy, precision, and consistency.
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Yes, if the prefix is an 'M' or 'SP' it means meters per second...
Just multiply that number by 3.28 and you have fps.
That's a guideline, at best.
I installed a Madbull M110 blue spring in my KWA M4, and it chrono'd at 405 FPS.
Would it have "settled" in at 360 FPS? Doubtful
.
Barrel length has very little to do with spring choice.
A quick search of the forums revealed a thread entitled "Spring Chart." Simply find the FPS you want and reference a spring. Be advised that there are other factors that govern how well your gun performs, so don't simply "add more spring" until you get the desired FPS. If you put an M120 (120 meters per second w/.20g BBs) in your gun, and it's shooting 220 FPS, you have other problems. If it's shooting 380 FPS...not so much.
I will say that FPS will NOT make you a better player, nor will it give you a tremendous advantage on the field. I think high FPS makes less experienced players dangerous. If you screw up and shoot me too close with a gun shooting 330, my attitude will be to tell you to watch your engagement distances and try harder. Swap that with a 400 FPS gun and you are getting sent home.
PRACTICE will make you a better player. PRACTICE and TEAMWORK will give you a decided advantage on the field, but you can't buy either of them or get them from playing video games. You can dump tons of money into your gun, and if you suck, you'll still suck, you will just suck with a faster gun. One of our most effective players was on the field for two years with an AEG that shot 220 FPS. Anyone that has played with him will tell you that he dominated the field. This was possible because he was a sneaky bastard and worked hard at being a good player, not because of a metal body or 399.995 FPS.
Thanks man, I need that chart so that my guns is legal for the field!
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