Will Huma reg fix fx impact reg creep?

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Shinyknight

Shinyknight

Member
Feb 26, 2019
319
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Minnesota
Like most fx impact/crown owner. I'm having this reg creep. Usually creeps about 5 bars over night. But if leave for few days to a week without shooting. It will creep from 140bar to 150 bar. I know dry fire 2-3 times will bring it back down to normal. But tired of having to do it every time I let the gun sit. Anyone with an impact that switch to Huma reg can chime in and let us know how the Huma working for you? Does it fixed the reg creep issue? I'm temping to buying one but read it's no different from the fx reg. Then why would they be charging $115 for it if it's no different? Has to be better than stock reg? I'm about to press the order button on a Huma reg but worry it won't fix the creep and will waste $115 on it. So just want to know from those who switch how well the Huma reg vs fx reg before I order one. Thanks 
 
Before you drop some coin on a new regulator, how much is your first shot varying from the subsequent shots?

Reason I'm asking is because a rise from 140 -> 150 bar (2030 -> 2175psi) should not produce a meaningful change in velocity if the hammer strike is adjusted to have the rifle operating on the "knee" (approx 97% of maximum velocity). Just as an unregulated PCP will maintain a tight ES over a range of several hundred PSI when it's adjusted properly, so can a regulated PCP.

Even with conditions that are not favorable to self-regulation, for example a weak valve spring, it should be very possible to get a 1-2% ES if the pressure is varying only 150psi.
 
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Before you drop some coin on a new regulator, how much is your first shot varying from the subsequent shots?

Reason I'm asking is because a rise from 140 -> 150 bar (2030 -> 2175psi) should not produce a meaningful change in velocity if the hammer strike is adjusted to have the rifle operating on the "knee" (approx 97% of maximum velocity). Just as an unregulated PCP will maintain a tight ES over a range of several hundred PSI when it's adjusted properly, so can a regulated PCP.

Even with conditions that are not favorable to self-regulation, for example a weak valve spring, it should be very possible to get a 1-2% ES if the pressure is varying only 150psi.
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When on reg I get low 850 to high 865 with King heavy mk2. When let set overnight. First shot will be low 820, 2nd shot 830.. before it goes back into the 850s. For a $2000 gun. I'd like it to shoot 850-860. Come back next day and still shooting 850-860. Not in the low 820.
 
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Very happy with my Huma reg. 1.st gen Impact. Original never really worked like it should.
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I guess that settles it. Gonna place an order for a Huma reg. Damn can't believe spend $2000 on a high end rifle and still have to folk up another $115 just to get it right. Fx needs to fix their guns before selling to their customers. This isn't a $300 gautlet. Smh
 
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To give you some feedback I recently installed one of the new Gen 3 regs in a friends' Crown and saw absolutely no creep in the following two weeks I was playing with his gun. I installed the Extra High Pressure model that runs from 140 Bar all the way up to 195 Bar. It enabled me to set up his rifle to shoot the 34 grain MKI's at an Avg. V of 1015 ft/s for a whopping 78 ft lbs energy...equivalent in power to a .30 cal FX Boss, but with a much flatter trajectory and pellets that cost half as much as the .30 cal. pellets do! In my experiments I actually had the Gen 3 reg running flat out at 200 Bar just for fun...the pellets were smokin' out of the rifle but were not accurate so I set it down to 180 Bar to achieve 1015 ft/s. During all my experiments the new Gen 3 worked flawlessly. FX makes great air rifles but Huma makes better regs. Maybe someday the two will get together...?
 
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To give you some feedback I recently installed one of the new Gen 3 regs in a friends' Crown and saw absolutely no creep in the following two weeks I was playing with his gun. I installed the Extra High Pressure model that runs from 140 Bar all the way up to 195 Bar. It enabled me to set up his rifle to shoot the 34 grain MKI's at an Avg. V of 1015 ft/s for a whopping 78 ft lbs energy...equivalent in power to a .30 cal FX Boss, but with a much flatter trajectory and pellets that cost half as much as the .30 cal. pellets do! In my experiments I actually had the Gen 3 reg running flat out at 200 Bar just for fun...the pellets were smokin' out of the rifle but were not accurate so I set it down to 180 Bar to achieve 1015 ft/s. During all my experiments the new Gen 3 worked flawlessly. FX makes great air rifles but Huma makes better regs. Maybe someday the two will get together...?
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Thanks for the feedback. I plan to mainly shoot 34gr mk2. But over 1000 fps is way too fast imo. I prefer to shoot around 860-900s. Fx should just use Huma reg in all their guns. We pay top dollars for the fx guns. They ain't cheap. So they shouldn't have cheap plastic reg. The Huma is made of brass or metal while fx use plastic? Come on fx. Your guns are $1300-2000 and you are using cheap plastic reg? Smh
 
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Finally pull the plug and order a Huma reg. Will report back once it arrives. Hope it fixed this creep. Tired of it on a $2000 gun. Total was $120 shipped. 

1555572546_9666633615cb82742577cb5.98886556_Screenshot_20190418-022708.png



 
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I recommend cancelling your order from the Netherlands (since it's going to take 3 weeks to get here) and order from the USA... I have a gen2 16mm extra high pressure and even though they say 145-190 mine does 100 -170 with no problem.

https://www.trenieroutdoors.com/gear/huma-airgun-regulators/huma-air-fx-airguns-regulators/
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Dang already place order. I'll try to cancel it if there is a supplier in the USA. I'm planning to set pressure to 140-150. Should I get the 145-190 in case I ever decide to go higher? They can also go down to 120-130 bar if needed to correct? I have gen 3 impact.
 
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Maybe the Temperature causes the Creep.

According to :pV/T=nR

Of cause the equation above is not suitable for the High-Pressure-Air,but you can learn something from it,that is:

If the V is Constant,when the T increases,then the P increases.

So,how to judge the Reg is good or bad:

Staying in a room the Temperature is constant and fire it ,or fire it when the temperature is at the highest level of a day,

Then record the number of the Reg gauge and be patient,wait about 10 minutes and record it again,

After half an hour,you can record it again.

If the gauge number is increasing,then you should repair it.

Of cause the best way is putting a camera in front of the gauge to record the whole process.

In my opinion,the HUMA REG is not as good as I wish,

Sorry for my English,I can not do some math for you to prove why I said it is not good for me.

But I can tell U the reason, that is:

The disk spring of HUMA is not enough,they should be a double or much more.

According to the "equilibrium of forces" and force analysis the "valve stem" ,U can get the results.






 
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When on reg I get low 850 to high 865 with King heavy mk2. When let set overnight. First shot will be low 820, 2nd shot 830.. before it goes back into the 850s. For a $2000 gun. I'd like it to shoot 850-860. Come back next day and still shooting 850-860. Not in the low 820.
Click to expand...

Maybe I’m misunderstanding you but you’re saying sometimes your first shot is slow (820fps) but other times the first shot may be right where you expected (850 - 860fps)?

If so, that symptom is unlikely to be caused by creep. Creep tends to be consistent, so if he slow shots are caused by creep, you should get a slow shot 100% of the time you see the gauge sitting at the elevated pressure of 150 bar. If you are occasionally getting a full velocity shot when the gauge reads 150 bar, look elsewhere for the cause. Of particular interest would be the hammer and anything that may influence how consistently it strikes the valve. Viscous wet lubricants are the most common cause.
 
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When on reg I get low 850 to high 865 with King heavy mk2. When let set overnight. First shot will be low 820, 2nd shot 830.. before it goes back into the 850s. For a $2000 gun. I'd like it to shoot 850-860. Come back next day and still shooting 850-860. Not in the low 820.
Click to expand...

Maybe I’m misunderstanding you but you’re saying sometimes your first shot is slow (820fps) but other times the first shot may be right where you expected (850 - 860fps)?

If so, that symptom is unlikely to be caused by creep. Creep tends to be consistent, so if he slow shots are caused by creep, you should get a slow shot 100% of the time you see the gauge sitting at the elevated pressure of 150 bar. If you are occasionally getting a full velocity shot when the gauge reads 150 bar, look elsewhere for the cause. Of particular interest would be the hammer and anything that may influence how consistently it strikes the valve. Viscous wet lubricants are the most common cause.
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I meant when it's on the reg, 140 bar. It's shooting between 850-860 with 34 gr. If let sit overnight, the neddle is almost at 150 bar. Let sit for couple days and it can get up to 150 bar. First shot is always low. I tested with a chrony and get 820 on first shot. Then 830. And climb back to 850-860. And it's not due to temp. Cause I learn it in the house. Room temperature. Don't even take it outside. So no temp different. 
 
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I had this issue as well, so this is what I did: I chucked the piston in a hand drill, spinning it fast, I smoothed the sealing surface with the sharp edge of a razorblade. It takes very little pressure and a steady hand holding the razor straight to keep the edge square. Then clean and grease the regulator housing and parts well before assembly. Next, I removed the valve stem assembly and cleaned and greased the o-rings, rod and springs. I also cleaned the hammer weight and the tube it slides in of any grease so it would have no resistance in it's travel.



As far as the Impact being $2,000.00, there is a lot of research and development in them as well as a proportional number of machined and finished parts. That all adds up be figured into the cost of the gun when sold new to the public. If you don't believe the cost is justified, go to a machine shop and request a quote to have just the valve housing and seat recreated, with a three year warranty, and see what they would charge.
 
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Okay thanks for clearing that up.

Can you address the question of how it's tuned? The velocity shouldn't vary anywhere near that much for a 10 bar pressure delta if it's tuned to the knee.

BTW, Airgun-hobbyist explains the way to deal with creep at the root cause. It's caused by microscopic imperfections in the regulator's valve seat that allow a tiny amount of air to slowly weep through after the surfaces are otherwise squeezed together. My approach is slightly different however. I dress both surfaces against wet/dry sandpaper that is backed by a piece of glass plate (good flat surface). A progression of 600->1200->2000 grit typically does the trick.
 
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