Help With my LOWWW Fps

[WhiteJawz1]

Originally Posted by ThunderCactus

barrel fouling is dirt and grease on your bbs as well as cylinder grease

I gave it a good clean and my fps is the same
and I tried my stock 6.08 barrel and my fps when't down by 15

[ThunderCactus]

so it's either an air nozzle to hop chamber leak, or it's in the mechbox
Did you install the spring with the tightly coiled end on the spring guide?

[WhiteJawz1]

Originally Posted by ThunderCactus

so it's either an air nozzle to hop chamber leak, or it's in the mechbox
Did you install the spring with the tightly coiled end on the spring guide?

my spring that am using right now has no coils but my m125 does and yea I put it in right, what fps should someone be getting with a m125

[ThunderCactus]

gonna guess around 400fps, but what brand?
M120's generally range from 400-430fps

[WhiteJawz1]

Originally Posted by ThunderCactus

gonna guess around 400fps, but what brand?
M120's generally range from 400-430fps

element

[ThunderCactus]

google says above 400ish somewhere
When you compression test the mechbox, are you doing it with the air nozzle in the forward position?

[WhiteJawz1]

Originally Posted by ThunderCactus

google says above 400ish somewhere
When you compression test the mechbox, are you doing it with the air nozzle in the forward position?

no it all the way back should I do it from a forward position

[ThunderCactus]

YES
I've seen very consistent 40fps losses just from a bad air nozzle before

[pestobanana]

Try a different piston head. I find gearbox compression tests not too revealing about what FPS you can attain with the spring. With a Modify S100 spring, I would get 330 fps with a Lonex POM piston head, 360 fps with a KA aluminum piston head and 395 FPS with a Modify piston head. When I tested for compression they all felt the same.

Originally Posted by ThunderCactus

YES
I've seen very consistent 40fps losses just from a bad air nozzle before

LOL I've seen 90 fps losses.

[ThunderCactus]

^YEAH like wtf right?
The worst was the STAR M4, but that was a nozzle to hop problem. Their hop chamber is locked into their mechbox shell, but it's locked in slightly too far away from the hop chamber so there's a constant 90fps loss lol

[WhiteJawz1]

Originally Posted by pestobanana

Try a different piston head. I find gearbox compression tests not too revealing about what FPS you can attain with the spring. With a Modify S100 spring, I would get 330 fps with a Lonex POM piston head, 360 fps with a KA aluminum piston head and 395 FPS with a Modify piston head. When I tested for compression they all felt the same.



LOL I've seen 90 fps losses.

I got 3 different ones so i will give those all a try