Fx Impact Fix & Mods for more FPS / FPE

Forums PCP Airguns Fx Impact Fix & Mods for more FPS / FPE

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    Kelik
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    Hello all 

    Looks like FX has release super bigger plenum that was born here

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    sgtBunny
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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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    Airgun-hobbyist
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    sgtBunny

    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?

    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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    sgtBunny
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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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    Glem.Chally
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    sgtBunny

    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.

    Do you look at your reg gauge that often?

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    edosan
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    sgtBunny

    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.

    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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    sgtBunny
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    Glem.Chally

    sgtBunny

    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.

    Do you look at your reg gauge that often?

    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.

     

    edosan

    sgtBunny

    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.

    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! 

    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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    mtnGhost
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    Deleted (wrong thread)

    • This reply was modified 6 months ago by mtnGhost.
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    edosan
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    thought about it a while ago, but the I ask the same Q than Glem did, and start another project jaja

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    bucketboy
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    Glem.Chally

    sgtBunny

    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.

    Do you look at your reg gauge that often?

    Me…no! 
     

    the impact is the only one of my guns that does have a reg fitted to the low pressure side, I can’t say that I miss that on my other guns.

    the plus side is that it’s easy to check if there is a reg problem but let’s face it, there shouldn’t be. If you are someone who constantly fiddled with reg setting then it is really handy. if you shoot different calibres and at different speeds then it’s very handy.  The down side is you feel obliged to fiddle with regged pressure when there is no need The gauges aren’t that accurate so bit of a guess as to the exact pressure. but most annoyingly for me, I can hear the gauge go “ping” every time I pull the trigger.  Once I get my impact shooting like I want it to shoot,  I am seriously thinking about removing the gauge and fitting a blanking plug instead. I use a digital pressure gauge to set the regs on my other guns so it wouldn’t bother me to screw a gauge into to impact when needed,  plus it would save about 1/2ozs in weight, ….at my age, every little helps.

     

     

    Bb, 

     

     

     

     

    Bb

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    BMC
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    I just want to say thank you to everyone on this thread. My 2017 smooth twist 30cal with a 700mm barrel at 150b was maxed out at 865 fps shooting the 50 grain pellets. After all the mods I am now getting 940 fps at 147b. One thing I did that I don't recall reading about was to drill the rear block out with a 19/64 drill bit. The set screw still tightened up on the valve housing. I was going to get the bigger plenum but now I don't think I need it. Thanks again Brian.

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    Airgun-hobbyist
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    BMC

    I just want to say thank you to everyone on this thread. My 2017 smooth twist 30cal with a 700mm barrel at 150b was maxed out at 865 fps shooting the 50 grain pellets. After all the mods I am now getting 940 fps at 147b. One thing I did that I don't recall reading about was to drill the rear block out with a 19/64 drill bit. The set screw still tightened up on the valve housing. I was going to get the bigger plenum but now I don't think I need it. Thanks again Brian.

    Modifying the block's port is hidden a ways back in one of my responses.  I used a Dremel tool with a 1/4" mill bit working through that threaded hole to open up and port match the block's port to the valve housing's hole, and to the brass transfer port.  I didn't get the latest Plenum, nor did I add the additional plenum either.  My shot count is really low and reg fairly high at 160+, but it shoots well and can push 50 grainers well over 1000 fps if I wanted to. 

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    AirSupply
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    sgtBunny

    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?

    The time that it is important to see it is when you adjust your reg pressure. The easiest way to do that is turn the gun upside down. Then you can see your gauge while adjusting the pressure. 

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    sgtBunny
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    AirSupply

    sgtBunny

    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?

    The time that it is important to see it is when you adjust your reg pressure. The easiest way to do that is turn the gun upside down. Then you can see your gauge while adjusting the pressure. 

    It's easy to say turn it upside down but what do you do when you have an added plenum and a bag rider.

    Not my gun but you get the point.

    This is what I want to do with my Impact when it comes in.

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    edosan
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    one of the reasons why I do not use a bag rider, instead a simple lab lifter 

    https://www.airgunnation.com/topic/back-bag-rest-for-bench/

     

    • This reply was modified 6 months ago by edosan.
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    Hande
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    edosan

    one of the reasons why I do not use a bag rider, instead a simple lab lifter 

    https://www.airgunnation.com/topic/back-bag-rest-for-bench/

     

    Thanks for the tip! I just ordered one.

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    marcobet38
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    Intend to install power plenum…but i can't open this with 11 mm spaner…any comments? Now the shape become round circle

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    sniperlabyo
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    Use vice grip, that part is going to be replace with a larger bore for the spring 

     

    Ernest 

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    marcobet38
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    Thanks…Ernest…👍

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    heavy-impact
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    marcobet38

    Intend to install power plenum…but i can't open this with 11 mm spaner…any comments? Now the shape become round circle

    I highly recommend the Knipex – Pliers Wrench for applications like this where you need a secure non marking grip. These may look like pliers but it is a wrench that will never slip. You can't understand until you try them.

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