Just call FX USA and order Earnest Rowe's power kit. It's that simple. 1-866-639-0772
He no longer sells on ebay.
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Crown & Impact Power Mod Kits by FX USA (Ernest Rowe)
- Thread starter BDX
- Start date
Just call FX USA and order Earnest Rowe's power kit. It's that simple. 1-866-639-0772
He no longer sells on ebay.
I received my $51.14 Impact power kit today and I'd like to thank Newman Buck and Earnest Rowe of FX USA for getting my order out before holiday vacation.
Kit contains
1 - 6.28 gram brass hammer weight that replaces the spring guide.
1 - 5.8mm valve seat
1 - standard hammer spring
Kit contains
1 - 6.28 gram brass hammer weight that replaces the spring guide.
1 - 5.8mm valve seat
1 - standard hammer spring
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Gotta love getting new toys/parts right before Christmas. Cheers!
5.8 mm valve seat, is that for .22 cal? With the common 3mm valve stem, that would flow enough air to support 10% more flow than forward porting equal to .19"....but I've found 5% to be plenty so I wouldn't port beyond .1935" personally with that valve seat. That would work fine for a .25 cal too but thats only 76% of bore porting where I recommend 85%+ for regulated rifles. JMO!
Not sure why its 5.8 and not 6 mm? Would the stock impact/crown poppet not seal on a 6mm seat? If so that explains it!
5.8 mm valve seat, is that for .22 cal? With the common 3mm valve stem, that would flow enough air to support 10% more flow than forward porting equal to .19"....but I've found 5% to be plenty so I wouldn't port beyond .1935" personally with that valve seat. That would work fine for a .25 cal too but thats only 76% of bore porting where I recommend 85%+ for regulated rifles. JMO!
Not sure why its 5.8 and not 6 mm? Would the stock impact/crown poppet not seal on a 6mm seat? If so that explains it!
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Ric,
You're talking about porting the stock factory VS yes? Hope I'm not preaching to the choir here as far as the genesis (Stoti!!) of this modification goes, but I probably am, ah well c'est la vie. When Ernest discovered that the valve seats in the Impacts/Crowns were splitting over time due to FX's material selection and VS dimensions (I refer you to your statics class!
) he substituted Titanium for his valve seat material and was able to open them up a bit more. This is actually the first I've seen made mention of diameter of his porting.George
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I'm not sure where the VS limit is but all the Impacts and Crowns run the same 5.56mm valve seat regardless of caliber. I already had a 5.8mm valve seat and porting so the only improvement for me will be the hammer weight. I also purchased 2 extra pellet probes and barrel transfer ports (barrel inlet) to experiment with.
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H-I!
Newman mentions that Ernest had played with dual porting on, I think, the probe and really got nowhere for his efforts. I'll be interested in whatever experiments you choose to try!
George
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I just cross referenced the VS part numbers and the Boss uses this same seat. Might have to get one.
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Machining one valve with the same dimensions for a range of calibers and then choking air flow is best from a production / manufacturing stand point, but for a custom, top performing air rifle, you want your valve seat, poppet diameter, throat, and porting to all be setup for your particular caliber. This doesn't make anything that manufacturers do improper by any means, just less than ideal and not the most optimal.
The numbers I stated in my previous post were more for caution on the side of keeping ports under what was mentioned as its crucial for efficiency/power that the valve seat flow at least 5% more than the porting forward of it, which the 5.8 mm valve seat severely limits on .25/.30 cal. JMO!
The numbers I stated in my previous post were more for caution on the side of keeping ports under what was mentioned as its crucial for efficiency/power that the valve seat flow at least 5% more than the porting forward of it, which the 5.8 mm valve seat severely limits on .25/.30 cal. JMO!
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For the crown, I made a custom VS with a 6.65mm bore and matching valve pin, if all testing are good It will be available next year and hopefully it will match the 110 FPE + .30 impact that has been on testing for months now.
As you know the crown and impact are multi caliber, so the power kit have to be tune for your caliber — so many adjustment to do so, if you don’t want all the power tune it down for max shot count and will be alot more then stock.
As you know the crown and impact are multi caliber, so the power kit have to be tune for your caliber — so many adjustment to do so, if you don’t want all the power tune it down for max shot count and will be alot more then stock.
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Would this or your other modified valve seat fit the Boss?
The 6.65 including the bigger valvepin of course
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With the OEM VS that take 7X1.5 oring has limited bore size to be reliable. With 6.20 mm bore the valve pin will go through the VS and jam in about 12+ shots. With 6mm bore the VS will break between 1-2k depends on your regulator pressure sooner at 180b. 5.85mm bore provide the combo of power and reliability with months of testing.
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The Boss power mods Are due after the Crown complete testing, both action are almost the same so easy to apply on the Boss.
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Hello Ernest- I just started a thread about my power kit results after I noticed you posting here. I got very disappointing results. If you would please post inmy thread about what could possibly gone wrong.
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No need to call, just got a reply from Newman (FX Usa):
Thank you for reaching out to us! Unfortunately, we have put a hold on all new power kits until Ernest makes a final design. Thank you for your interest.
So...waiting list now
Thank you for reaching out to us! Unfortunately, we have put a hold on all new power kits until Ernest makes a final design. Thank you for your interest.
So...waiting list now
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I'm hoping I can just get the 2018 hammer kit.
All I want to do is make use of 150bar from my Crown 22. I need 30 - 40 more fps than what I can get now, which is 895 fps at 140bar with 21gr pellets.
All I want to do is make use of 150bar from my Crown 22. I need 30 - 40 more fps than what I can get now, which is 895 fps at 140bar with 21gr pellets.
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Pretty much of the same mind Bob. Maybe give Newman a call? I obviously can’t and I’ve not heard back from pre Xmas emails and a pending quote. I dunno that we need the over bored VS and matching valve stem to get the slug velocity for the higher weights as we’re just looking at Nielsen 19 & 21gr.
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I have an email into Newman so I'll give him some time to reply.
If I can get what I need from just the basic kit then I'll be happy. If Ernest doesn't think that's possible, then I guess I have no choice but to wait on the 2019 kit.
I don't think I'm asking for too much from the 500mm barrel........it's not like I want to push 23gr slugs at 930fps....I just want to shoot the 19 (or 21gr at the heaviest) at 930. Any heavier and I'd probably be better off with a 600mm barrel.
If I can get what I need from just the basic kit then I'll be happy. If Ernest doesn't think that's possible, then I guess I have no choice but to wait on the 2019 kit.
I don't think I'm asking for too much from the 500mm barrel........it's not like I want to push 23gr slugs at 930fps....I just want to shoot the 19 (or 21gr at the heaviest) at 930. Any heavier and I'd probably be better off with a 600mm barrel.
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The latest from FX USA. I don’t like it but it is what it is. See below email from Newman.
__________________________________
Hey Mike,
I apologize for having to change your order again, but these kits were still in their infancy and released too soon. After further testings, Ernest has determined that the kits can only be properly installed in-house, so we have cancelled all previous orders. We will be refunding your money tomorrow. If you wish to send in your gun when the new power upgrade becomes available in a few months, we can discuss payment again at that time. Again, we wish to apologize for this hassle that we have put you and several other customers through.
____________________________________
Maybe once they get this figured out they’ll offer the kits again?
Mike
__________________________________
Hey Mike,
I apologize for having to change your order again, but these kits were still in their infancy and released too soon. After further testings, Ernest has determined that the kits can only be properly installed in-house, so we have cancelled all previous orders. We will be refunding your money tomorrow. If you wish to send in your gun when the new power upgrade becomes available in a few months, we can discuss payment again at that time. Again, we wish to apologize for this hassle that we have put you and several other customers through.
____________________________________
Maybe once they get this figured out they’ll offer the kits again?
Mike
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