Fx Impact Fix & Mods for more FPS / FPE
- Thread starter AirSupply
- Start date
Yeah i tried to get the original out of the old plenum tried for a bit but didnt. Ended up finding one. Is the original PURO?
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Thanks I figured it out but I wanted to double check. What’s your opinion about this plenum?
Muchas gracias
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Looks good, but potentially it can be the most dangerous part on an impact, I think the maker launch it without proper testing (quick buck you call it?). I will stick with ugly and proven external plenum that works perfect. Experience has teach me: try to NEVER get first generations of anything! (less headaches)
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De nada, I'm happy with it adds some air capacity actually ive noticed. Its not perfect but i think its made well and definitely adds some power.
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Looks like PUR90, i have the spare and the factory one still in the MK2 plenum if i have issues. I guess ill order some spares.
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Well you're entitled to your opinion of course. They are tested to more than double working pressure and 80 bar more than it could potentially ever see (if the reg fails and lets full pressure through. With the amount of work to make these calling them a quick buck is a stretch as i call it. Good material 7075 and thicker than OEM wall thickness im comfortable using it. If I wasnt i wouldn't use it.
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Sure Glem but is not a "spam opinion" (I was ask for it ... so there you go Kiko)
Also I have several PM showing me problems with that plenum (at least 4 if I recall correct, different users) ... and probably several others stay quiet. I would never sell a plenum without a minimum of 6 months on real testing on real impacts on different users, but hey that is just me. On paper, sure 7075 aluminum is good and wall MUST be thicker (more volume needs more thickness). Pretty sure there are happy users too!
Like I said, the idea is pretty good! But time will tell ... I really REALLY hope I am wrong a nothing bad ever happens and Michal make a lot of sales!
PS: is just me or now everytime I post here I go to page 1? or when a click on suscribe topics??
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Edosan , I think you are referring to a comment I made regarding the vs opening . In .22 cal ( 5.5 ) going any bigger shouldn’t in theory make any more power as the restriction in air flow is at the probe and barrel port . Now in .25 ( 6.35 ) getting the air flow to 6.5 will make a big difference as we are seeing in Nathan’s post. I have recently tested 2x port size in comparison to caliber and when compared to full bore porting only saw marginal improvements . This is most likely due to the force needed to open the valve . I was not able to reach the plateau in power as to ran out of spring and hammer weight .
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To the guys making their own oversized valve seats.
Are you keeping the 40 degree seat angle when you go up to 7mm ?
1mm o-ring or 1.5mm ?
Are you keeping the 40 degree seat angle when you go up to 7mm ?
1mm o-ring or 1.5mm ?
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Surprise i bought a .30 setup! Got a few molds from NOE should be here end of next week hopefully. A 59gr magnum pellet and their 68gr HP but for now i bought a tin of the 45 and 50gr JSB. Brought the chrony out to my shooting spot and turned up the reg.
Got this at 130 reg with the 44.75, 999 at 150 bar.
And then this at 170 with the 50gr, wait till i get some heavier stuff. The cast pellets i think ill have to single load but the slugs will fit.
Got this at 130 reg with the 44.75, 999 at 150 bar.
And then this at 170 with the 50gr, wait till i get some heavier stuff. The cast pellets i think ill have to single load but the slugs will fit.
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Do you guys do anything to .30 probe/inlet or not really anything to be had because they're already almost if not port size?
Edit well i flared it a bit and worked the probe a bit, i might not have had the valve adjuster all the way back too.
Got this with the 50.15gr, yowza 127fpe with pellets.
Used this and ran it in the end of the probe also.
Edit well i flared it a bit and worked the probe a bit, i might not have had the valve adjuster all the way back too.
Got this with the 50.15gr, yowza 127fpe with pellets.
Used this and ran it in the end of the probe also.
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Just did a quick test with my new .30 700mm slug liner.
Brass port flared and elongated, top half of the pellet probe removed.
75cc air tube from Poland + 20cc yong heng external.
6.35mm valve seat, 4 gram hammer weight
Hammer on max and valve stop past the 4th line. Not tuned yet
150 bar
1072 fps with 50gn jsb - 128 fpe
948 fps with NSA 66gn fbhp - 132 fpe
Brass port flared and elongated, top half of the pellet probe removed.
75cc air tube from Poland + 20cc yong heng external.
6.35mm valve seat, 4 gram hammer weight
Hammer on max and valve stop past the 4th line. Not tuned yet
150 bar
1072 fps with 50gn jsb - 128 fpe
948 fps with NSA 66gn fbhp - 132 fpe
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thank you guys for sharing all your experince .. really helpeful ... !
regarding C3 bumper what's the best solution to prevent it from breaking ?
i mean we all want more power for slugs , heavy pellets , OEM C3 breaks easily ...
regarding C3 bumper what's the best solution to prevent it from breaking ?
i mean we all want more power for slugs , heavy pellets , OEM C3 breaks easily ...
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