Spring/gearbox/motor

[conky44]

Hi guys,

I am a noob and have some questions. I have a m4 with a g&p highspeed ratio gearbox (30 or so bps). I have a soft spring that needs to be replaced, I am only getting 270fps with .25bb. I have installed a new madbull 6.03 but have not crono it as of yet. Also I have a g&p m120 motor, I have the following questions:

1. What is max spring this setup with m120 motor could pull, without losing tons of ROF.
2. Would a new motor, keep the speed and allow for a high spring, ie sp120 or something if this m120 motor would not.
3. If a new motor is required, what would be the best one for ROF and a spring in the sp120 range. Ie M160, M180 satan, Systema, J&P.

Looking to go to around 350 or so fps.

Thanks for all the help, us Noobs need it.

Conky

[George Burdell]

What exactly is the obsession with FPS? A better hop up unit is going to improve your range more than increasing your gun's muzzle velocity.

[R.I.T.Z]

Originally Posted by George Burdell

What exactly is the obsession with FPS? A better hop up unit is going to improve your range more than increasing your gun's muzzle velocity.

when a gun is shooting 270fps that is a problem.
stop posting


sounds like you may have an air seal problem.
how old is the gun? how many mags have you put through it?
s110 spring should give you the correct fps but i'd also check the nozzle and piston head for any damage.

[conky44]

It is not about the FPS. I have a good hop up unit, and a good bucking. I just need more to fps as I am out classed. The gun was designed as a SAW, I am just looking at options to improve the gun and have a better time. Close up no one can deal with the ROF on this gun, but at distance I am having a bit of problem due to the FPS. I was told if I get a better motor, it should not destroy the gearbox and allow for a bigger spring. But I thought the m120 g&p motor would be ok. I will look at the air seal issues though. Thanks again,

Conky.