Fx Impact Fix & Mods for more FPS / FPE

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AirSupply

AirSupply

Member
Jan 12, 2017
1,419
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Victoria, Australia
I use a delrin sealing washer about 1.5 or 2mm thick in place of the C3 bumper. It makes a little more mechanical noise but gives a little more velocity and durability.

When using more hammer weight it's important to finish your tune on the valve stop to keep from wasting air. Extra hammer weight isn't necessary under 150 bar.

Before elongating the barrel transfer port you need to chamber a pellet to be sure not to disturb that area.
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Yes Heavy Impact. Good point. Mark how far the probe goes into the barrel carefully. There isn’t a lot of material to enlarge the the hole in the probe in a forward direction. You don’t want to inlarge the TP in your barrel to find you’ve gone to far beyond what’s available on the probe. They need to be done together. 
 
Can you share more information Ernest?
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Change:

1. Dual TP has been lengthen to the max

2. with MK2 larger plenum tube and housing

3. external 40cc plenum fitting has been enlarge to M14 & M14 on the rear block with 9mm bore.

4. VS bore to 7.15mm with 7.65mm rod seat

5. rod spring has been moved 3" away from VS

6. thicker C3 bumper

7. Titanium Rod piston with replaceable delrin seat



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Thanks. Can we buy this power kit or at least some parts of it right now?

2, 4, 6 and 7
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Sorry not yet still testing to get more FPS so parts and measurements are on going to change. ----> I want to get max speed no more then 150b, I' still getting more speed!!!!!
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So I got and old one? jajajaa just kidding! keep the good work! ;)
 
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Can you share more information Ernest?
Click to expand...

Change:

1. Dual TP has been lengthen to the max

2. with MK2 larger plenum tube and housing

3. external 40cc plenum fitting has been enlarge to M14 & M14 on the rear block with 9mm bore.

4. VS bore to 7.15mm with 7.65mm rod seat

5. rod spring has been moved 3" away from VS

6. thicker C3 bumper

7. Titanium Rod piston with replaceable delrin seat



Click to expand...

Thanks. Can we buy this power kit or at least some parts of it right now?

2, 4, 6 and 7
Click to expand...

Sorry not yet still testing to get more FPS so parts and measurements are on going to change. ----> I want to get max speed no more then 150b, I' still getting more speed!!!!!
Click to expand...

So I got and old one? jajajaa just kidding! keep the good work! ;)
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Yes, Kinda old 👊 when I stop I'll send you another kit!
 
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Borrow some pics from another post from Ernest with mods 

To get maximum flow from the external plenum tube:

1. bore out gauge hole to M14X1.5 ----->75-100fps increase

2. need new plenum with M14 X 1.5 with 9mm bore hole 

3. valve housing need clear passage for the 14X1.5 bore ---see photo

4. the smallest air restriction are the transfer port on barrel and pellet probe, so dual port them see photo 45-65fps+ increase

FPS are actual testing---> no math !



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Already done my friend, valve tube is 20cc, mk2vt is 25cc external plenum is 40cc.

I have done / make 25cc and 30cc, and working on a 40cc in the lathe, for future tests

Easier than weight, is just to measure it with a 60cc something ( syringe for example) and water
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, weight works too.
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40 CC external plenum are you sure Edosan? or start with 25 cc?

Please help novice. I have another problem, I am a very old man. I need everything well detailed and explained. Peace, peace!!!!!! 
 
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I want!!!!!!!! Where I get it?
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There is no way to know... one day they're selling them at FX USA, the next day they're telling people it's not for sale now and then Ernest Rowe will come on the forum and give them away or sell them or whatever. There seems to be no rhyme or reason, just whatever strikes the maker's fancy from day to day. Tratar de hacer negocios con FX USA te volverá loco.
 
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I want!!!!!!!! Where I get it?
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There is no way to know... one day they're selling them at FX USA, the next day they're telling people it's not for sale now and then Ernest Rowe will come on the forum and give them away or sell them or whatever. There seems to be no rhyme or reason, just whatever strikes the maker's fancy from day to day. Tratar de hacer negocios con FX USA te volverá loco.
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It’s a pity, because I do not get anything here. But I will open a thread to explain how to do everything. And how they do it
 
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What would've been sweet is if FX would give you the option of switching he bottle gauge to the left side for right handed shooters. Go ahead and machine a hole on the right side and plug it with a black or even brass BSPP plug like the Wildcats uses that a lot of us have converted to a full time regulated pressure gauge port. As versatile as the gun is why not. As Edosan is hinting toward go ahead and have a similar option on the regulated gauge. Cosmetically though the plugs might be a distraction. Sorry to drift off course a little but Ed's post above made me think of that.

Jimmy
 
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I set up my new mill last night and modified my rear block and yong heng external plenum. I couldn't get the yong heng filter housing to seal on my rear block before modifying it because the threads were drilled and tapped at a slight angle. I drilled it and the rear block 1/2" and tapped them M14x1.5 in the mill so it's perfectly square with the rear block now. My new lathe won't be here for 3 more weeks so I cut a bolt and drilled it 5/16" for the connector. I'll make one with a larger passage when I get the lathe. I also milled the top of the yong heng housing flat to get a perfect sealing surface. Edosan barrel extension on the left. 👍

1562699378_18992704255d24e672abd112.73326997_M14x1.5 rear block -.jpg



 
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@mtnghost an FX block for testing m16 threads! jaja, and barrel extensions that I need to polish and refinish, in steel instead of aluminum this time.

@airsupply thanks! I broke a small piece of my teeth! guess I am low in calcium! jajaja

@heavy-impact nice!!! you are a grown man now! jajaja ;), maybe you need to cut that extension a few mm (10 probably, just a straight cut, weird in mine 600 to 700 was a perfect fit and also in 500 to 600) but maybe not. Looks very nice tho! jaja
 
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Congratulations on another win. Is the fat boy plenum 60 x 80mm ?
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Podium (3rd place) no win! but THANKS! ;)
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What??!!! No first again? Wait a minute, I get it now - 1st place gold would be too HEAVY 💪 😝
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I know big L jajaja 

I have a few golds around saved for your crown hammer weight! jaja! 😂
 
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Seems like FX will have to do a power increase when they introduce a .35 cal Impact, which they said was in the plans this year. To me this gun feels optimized for .22/.25 caliber and is stretching a bit at 30 cal (although still a very competent rifle at 75-80 ft-lbs).
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I've been thinking the same thing. While I don't need a .35 cal, I've been holding out to see what they do with the power. If Ernest has any tricks he hasn't shared, this is where we'll see them. At the very least they should include the larger bottle, or maybe even a dual bottle option, and with any luck they'll pull out all the stops and maximize everything for power.
 
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