Changing settings on the Impact - then changing back to factory settings

Jump to latest Follow Reply
D

DHart

Member
Jul 7, 2018
665
54
AZ, United States
I've read that when people start changing the settings on the Impact, they can get things all screwed up and mess up the accuracy. But obviously, the adjustments are available to fine tune to different pellet weights, reduce gas consumption, etc. Right?

So, I'm wondering... if you tweak the settings for different pellet weights or distances, and things go haywire accuracy-wise, can't you just change the settings right back to where they were when the rifle shipped from the factory - and thus get right back to original accuracy performance? Or is that easier said than done?

Also, would swapping in a Huma regulator, at time of purchase, on an Impact head off some of the problems that some people seem to be having with FX regulators?

I'd like to apply this same question (installing a Huma at time of purchase) to the Streamline and the Wildcat II, also? Would that likely prevent some regulator problems that people have after a time?

I'm considering purchase of Streamline, Wildcat II, or Impact - that's why I ask. Perhaps the less-adjustable Streamline or Wildcat II might be a better choice than an Impact for the average shooter?
 
When you get your Impact, there's a place in the owners manual to write down all the factory setting so that if you do make some misguided changes and you want to start over,you have that info. I just wonder how many owners do this or convince themselves they know more than the factory anyhow so they skip that step and jump right in with no way back?
 
Upvote 0
When you get your Impact, there's a place in the owners manual to write down all the factory setting so that if you do make some misguided changes and you want to start over,you have that info. I just wonder how many owners do this or convince themselves they know more than the factory anyhow so they skip that step and jump right in with no way back?
Click to expand...

Oh. That’s good to know. So if you have the presence of mind to record the factory settings first, then you can fiddle like crazy with no worries about getting back to factory settings and Iike-new performance once again?
 
Upvote 0
In impact you won't need to change every thing.

Valve adjuster comes fully open

You don't need to adjust hammer by that little hex screw, only turn it from high to low.

The only thing that you need to change is regulator pressure. So you can mark where is it then change it's pressure.

0.177C 100 to 120 bar

0.22C 100 to 130 bar (with JSB 16 I adjust it at 100 bar and power level low shoot them at around 278m/s)

0.25C 110 to 140 bar

0.30C 120 to 150 bar

So if you want to use 0.22 and 0.30 adjust regulator at 130 then for 0.22 set power level one and for 0.30 max power. the only important thing is keep pellet speed around 260 to 280 m/s.

Or if you want extreme accuracy in one caliber you can adjust it where ever you want.
 
Upvote 0
Arash. I agree like Steve said in his video about master tuning inpacts it's a easy gun why do people try to make it hahahahaha d it scares most buyers away. 

From the factory it's set valve is all the way open reg pressure is the only thing to play with. But all the older inpacts had regulator problems not the new inpacts the have better regulators you can adjust up and down with out degassing the gun so no worries it's not hard to mess with. 

But as arash said keep a chart book of pressure readings it's easy 177 115 to 120bar 22cal 120 to 130bar 25cal 130 to 140bar 30cal 140 to 155 bar. I have a 30cal and I would only buy 30cal it's most accurate if you see all the videos by all the top guys who shoot in bench rest competitions.

only get a inpact x don't get the older version they are a big difference in regulators and better o rings as well the outside looks the same but anyway. It's not a difficult airgun to work on very easy I have several airguns and it's my favorite of all time. John 
 
Upvote 0
Yes, I take measurements of everything and also take pictures for a reference.

I'll measure the valve stem, the hammer and the reg pressure. Reg pressure you can do by marking the gauge or getting an edgun edmu which I have found to be very useful for tuning. 

Once all measured, you can tune away and go back to different settings that worked. Try to do one at a time and see how that effected the groups. Take notes of everything.

Unlike mentioned above, I highly disagree that you wont have to touch the hammer tension. If you want optimum performance and efficiency, almost everything will need to be touched. Gun still groups great out of the box and is very well balanced.

Hope this helps.
 
Upvote 0
The problem with the Impact is that the regulator gauge isn’t very accurate and the markings are in 50 BAR increments so once you change it, it’s very hard to get back to where you started unless you physically mark the gauge itself.

FX and the dealers use much more accurate digital gauges when setting these guns at the factory or for warranty work.
 
Upvote 0
I some how not agreed. you don't need some fancy tools to adjust it.

For mine I used chronograph and set hammer at lowest power. Then set regulator at 150 bar then start shooting with it. Also I had 160bar in it.

each five shoot used one pellet.

Data was like that:
150 bar:200m/s

140 bar:230m/s

130 bar:260m/s

120 bar: 270m/s

110 bar: 273m/s

105 bar: 276 m/s

100 bar: 278 m/s

95 bar: 270 m/s

So I set regulator down to 100 bar and I knew that it's the most efficiency with lowest hammer tension I could get out of my gun. But if my maximum speed reached to 250 m/s so I needed to change hammer tension and redo the test.

But the most important thing is I simply marked the regulator pressure before change it. so if it's 10 bar off that's mean when I put back, it's 10 bar off again and noting goes wrong. Also all regulator pressure change after time so when you buy it it's set at 120 and after a year it's climb to 140.
 
Upvote 0
i Think if you add the valve setting to all that, is just too confusing for many people including myself, who knows the logic behind it? Too many variables.



nah arash, that data only shows that the velocity peaks at that low reg setting. Because you have way too weak hammer spring setting.

It does not mean it is the most efficient overall. I believe you have to go lot higher on the reg and higher on the hammer but not too high onhammer spring to achieve that. The gun will be quieter too.

plus you can have wondering poi if you don’t check the FPS across the fill, regulator or not.
 
Upvote 0
Okay, all good info! Might I suggest, sincerely, that before you change anything you run your own Chrono test. At least 32 shots w/ each pellet weight! If you're running over 860 w/ 34g 25 cal, (for ex.) Dont change. Its important know what fps each pellet runs truest . That varies by cal and weight.

As far as reg creep; owning 2 fx`s. IMHO FX regs are an inferior product. And i have Annie (25 cal Impact) that shoots 3 inch group @ 180 yds.
 
Upvote 0
I think the valve setting is redundant if a PCP is tuned properly, the higher reg setting high pressure will slam the knock open valve shut, well before it can bottom out/ hit touch the bumper on the adjuster. If you use lot of valve adjustment It can’t be right, correct me if I am wrong! No expert on Impact here, just logical reasoning maybe that’s why the crown has a transferport adjustment instead, which works better overall, old school



i would just leave the valve fully open, so one variable less to worry about 👌

probably you paid for something what is pretty much useless for most people in other words. If you set the adjuster way too in and reg too low, and at the same time you max out the hammer, will it damage the internals just like dry firing with no air?
 
Upvote 0
In some way I agree with Milacik and in some way not.

I think that valve adjuster is not that handy. If you want lower power you simply reduce hammer tension. Also in impact valve at 100 bar or more won't open that long to let air waste. all the time you have to reduce valve tension to keep speed down.

Maybe if you want under 20 joules you need to use valve adjuster to reduce the speed because with hammer and regulator adjustment you can't reduce speed that much.

So Fx found a transfer port adjuster and hammer adjuster is more useful than valve adjuster.

But in the other hand at first I thought like you. less the air pressure more the air goes out. but when I start shooting I found an interesting thing: I can shoot more. I have some idea: first is I have extra 20 to 50 bar to use in my gun so that's give me extra shoot and second is With a 100 bar I let valve open but air with 100 bar goes out so think of for each second that valve is open 50% less air goes out but valve opens longer. so 1 second that valves open at 150 bar is equal to 1.5 second that valve is open at 100 bar.
 
Upvote 0
You must log in or register to reply here.
Top Bottom
Back
Home
Forums
Resources
Menu