FX FX IMPACT M3 vs M4

Jump to latest Follow Reply
M

milanilo

Member
Apr 19, 2020
36
6
saudi, Saudi Arabia
hello everyone
so i bought the FX IMPACT M4 while still having the M3 .

i am shooting the JSB EXACT 33.95 grains and HN 36 grains slug
so i setup my new M4 with the same M3 settings
what i noticed is M4 cant reach same FPS as M3 with same settings

although reg on both 136 psi
hammer macro is maxed out to 5
valve is in the 4th line

shooting HN 36 grains
fx impact m3 with hammer wheel on 14 gives me 980

while in the M4 same settings gives me 900

so there is almost 80 fps difference between

anyone noticed power deferential between both?
 
  • Like
Reactions: PITBULL69 and Markus33k
milanilo said:
hello everyone
so i bought the FX IMPACT M4 while still having the M3 .

i am shooting the JSB EXACT 33.95 grains and HN 36 grains slug
so i setup my new M4 with the same M3 settings
what i noticed is M4 cant reach same FPS as M3 with same settings

although reg on both 136 psi
hammer macro is maxed out to 5
valve is in the 4th line

shooting HN 36 grains
fx impact m3 with hammer wheel on 14 gives me 980

while in the M4 same settings gives me 900

so there is almost 80 fps difference between

anyone noticed power deferential between both?
Click to expand...
Do you have any modifications on your M3 or are they stock?
 
Upvote 0
On your M3, you have less pressure against the hammer opening up the valve if you’ve still got the first reg in place. If both the regs behind the trigger are set exactly the same, the pressure is less on that M3’s second reg due to having a first reg to take up the load. If say you have your first reg set at 180, then that’s 180 bar that second reg is working with.

With the M4 and only one reg, that single reg behind the trigger has all 250 bar bottle pressure against it.
I used 180 bar as an example. Drain your bottle pressure on the M4 to equal the pressure reading on your M3’s first reg setting, then run them both on the chrono and come back with your findings.

Or, do a first stage reg delete on your m3, top off both guns to a equal full fill, and do the comparison and see what happens
 
  • Like
Reactions: HogKiller
Upvote 0
Bigragu said:
On your M3, you have less pressure against the hammer opening up the valve if you’ve still got the first reg in place. If both the regs behind the trigger are set exactly the same, the pressure is less on that M3’s second reg due to having a first reg to take up the load. If say you have your first reg set at 180, then that’s 180 bar that second reg is working with.

With the M4 and only one reg, that single reg behind the trigger has all 250 bar bottle pressure against it.
I used 180 bar as an example. Drain your bottle pressure on the M4 to equal the pressure reading on your M3’s first reg setting, then run them both on the chrono and come back with your findings.

Or, do a first stage reg delete on your m3, top off both guns to a equal full fill, and do the comparison and see what happens
Click to expand...
i started to question the hammer weight on M4
once i increase the reg to 140 the speed drops!
it’s like the hammer cant handle pressure more than 137 bar even with hammer maxed out
 
Upvote 0
You must log in or register to reply here.
Top Bottom
Back
Home
Forums
Resources
Menu