Fx Impact Fix & Mods for more FPS / FPE

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A few pics of the work. I removed a bit of material from the inside of the probe to thin and “knife edge” it. Used the blue Dremel chainsaw sharpener then polished with some fine grit rubbery type of bits I had from who knows where.

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Good job and great results! 
 
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Hello Guys,



I added the plenum and modified valve housing & VS and TP and hammer weight.

My target is speed is 930fps. NSA .22 slug 27gr.

Right now I can get 960fps easily just only use 130bar. I was wondering what is the best way to tune the gun.

Should I increase the reg pressure to 150bar and use valve knob to reduce the velocity to 930fps?

Which way is the best for saving the air consuming and make the impact quieter?

High or low reg pressure?
 
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Hello Guys,



I added the plenum and modified valve housing & VS and TP and hammer weight.

My target is speed is 930fps. NSA .22 slug 27gr.

Right now I can get 960fps easily just only use 130bar. I was wondering what is the best way to tune the gun.

Should I increase the reg pressure to 150bar and use valve knob to reduce the velocity to 930fps?

Which way is the best for saving the air consuming and make the impact quieter?

High or low reg pressure?
Click to expand...

There are several videos on tuning (including FX videos), the higher the reg pressure more air you will use. Also the higher the reg pressure, louder your impact will be, that is why tuning is the balance between reg pressure, hst and valve opening. 
 
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Hello guys,

Next week i will receive my impact mk2 with 700mm .25 barrel with slug liner.

I want to shoot the 38,5gr NSA slugs, the heaviest i can get around here. I did order an power upgrade kit with enlonged tp, modified pellet probe, 7gram hammer weight, modified valvehousing and plenum.

But if i dont need to, i dont want to take the gun completely appart when i get it. 

Will i get enough speed (around 960fps) when i only replace the tp and pellet probe ? Or should i build in the complete power upgrade ?


 
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Hello guys,Next week i will receive my impact mk2 with 700mm .25 barrel with slug liner.I want to shoot the 38,5gr NSA slugs, the heaviest i can get around here. I did order an power upgrade kit with enlonged tp, modified pellet probe, 7gram hammer weight, modified valvehousing and plenum.But if i dont need to, i dont want to take the gun completely appart when i get it. Will i get enough speed (around 960fps) when i only replace the tp and pellet probe ? Or should i build in the complete power upgrade ?
Click to expand...

You will need it all.
 
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The very best that I could do without hammer weight and plenum is 945fps and that is on (.25 - 700mm Slug liner Barrel - 34gr JSBs) Modified valve housing, ported TP and probe, Delrin C3 bumper. Hammer spring maxed out and regulator maxed till it dropped then backed up a bit.

Like heavy said, you will need it all for sure to spit them 38.5gr out at the speeds your looking for.
 
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Has anyone modified the valve block in such a way they moved the gauge to be on the side facing out instead of on the bottom or on the bottom of an additional plenum?
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I have not saw one machined like that. There doesn't appear to be enough material there to make a seal at the bottom have enough threads to securely hold the guage.
 
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I may end up reaching out to someone to custom build one for me so it will have a thicker side wall to accommodate a gauge.
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Do you look at your reg gauge that often?
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It's not a matter of looking at it that often, it is out of convenience. On the underside of the gun is not convenient.



I may end up reaching out to someone to custom build one for me so it will have a thicker side wall to accommodate a gauge.
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Very easy to make, just need a drill, a bit of about 8mm and a tap/die 1/8 bsp ... if you drill in the wrong place then a new block!
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That is what I was thinking but wanted to see if anyone had done it. You are actually the first person I thought might have tried this.
 
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