Well looks like I won't be shooting my Impact for awhile.

I was finishing up on another one of Ernest's upgrades for the older MK1 guns and this happened. 😭 I drilled out the valve adjuster to the 7.30mm suggested and put it in the knob but it was tight so I very lightly tapped it with a smallish hammer and it folded over. Drilling to 7.30 doesn't leave much in the way of wall thickness on the adjuster screw. Expect a month or two if things go as usual when I order the part from FX. Probly get a couple just in case.

But then the thought occurred that I can get a metric bolt with the same threads, drill it out and have a werqing gun in a couple of days. It won't look that nice but it will be functional anyway. So I cleaned up the sharpest of the burrs so I would not cut myself when I take it to Parkrose hardware to get a bolt to match it.



https://www.youtube.com/watch?v=YDjxW8vYk9g&ab_channel=ErnestRowe





Just another day in the life of a poor addicted soul. 😉
 
The other thing I was tinkering an other day...with my mk2 PP

The valve adjuster hole I have is 7.3, but the spring is 7.2 (C42 1x7.2x45) . And if I have a closer look there when all assembled and the adjuster is at line 4 or 3 ...

Now watch this, saying it in microseconds.

The hammerseat kicks the spring, the spring morphs (contracts in length but also expands in dia) , but how much is a room in between the spring and the hole inner wall? 0.2

If you would paint inside the hole with a die spotting blue, I bet you the spring will rub it off. What is my point?

We will never get a 100% repeatable f/s because of this scraping = frictions with the spring - which actually controls the valve timing.

To prove this my statement I will pickup some springs with several wire sizes, but 6.5 OD max next time I visit the city.


 
One thing that I’ve never really understood about this hobby of ours: Why do peps take an awesome shooting PCP and start fuxing it up?? Tuning with FPS and pellet type, weight etc I do understand....but expanding ports, drilling parts, basically re-engineering an already professionally engineered and produced PCP that someone paid $1,000’s for never really made since to me. Now I get it if peps are trying to produce something that is better, patent and resell their idea / technology and invention to make ROI. But sooo often the end result is not optimum and the gun is then off loaded to someone else. Really 1 inch groups at 100 yards or meters is exceptional for what these PCP’s are designed to do, expecting pellet on pellet at 100 yards is simply not obtainable....unless one of these fuxineers makes a 100 yard long barrel.....even then you will not get a 1 hole group the exact diameter of the projectile you are sending!

Just an opinion

Beach-gunner
 
OK, I just power up my Impact first time after some two weeks of tinkering, it leaked out the tank in 30 second...on the PP valve tube-end oring (B23 or somewhere there).

A while back I ordered a larger bag of all spares for a complete service, but a box is buried deep in my basement lockers somewhere. I am doing alone myself my basement project for third months already, imagine I am just tossing things around every like two-tree days.

Thursday evening, 8.10 pm, what else to do? I go now deep diving until I find the orings, and no sleep until all done.



Edit:

Replaced the oring, 9.25 pm boresighting done. Isn't this fun?
 
Well I did this to myself. The bit I used had a 7.31mm shaft but cutting end was a bit larger so the walls on the adjustment screw ended up a little on the thin side. Also I was going by Ernest's information and he drilled it out according to the springs he had available. The spring included in the Slug Power Kit only required a 6.30 hole. So with that figured and another adjustment screw now available I have the mod finished.

But with the whole world burning down and all I am having trouble getting out to the range to test the new mods out. Opened the door and closed it back up in a hurry as the smoke burned my eyes and nearly choked me.



50 miles south Chinook Landing 3 miles North



Neighbor family took this pic 50 miles south. I took the other pic three miles from home. Looking east visibility limit

is about 1/4 mile.
 
OK, I just power up my Impact first time after some two weeks of tinkering, it leaked out the tank in 30 second...on the PP valve tube-end oring (B23 or somewhere there).

A while back I ordered a larger bag of all spares for a complete service, but a box is buried deep in my basement lockers somewhere. I am doing alone myself my basement project for third months already, imagine I am just tossing things around every like two-tree days.

Thursday evening, 8.10 pm, what else to do? I go now deep diving until I find the orings, and no sleep until all done.



Edit:

Replaced the oring, 9.25 pm boresighting done. Isn't this fun?


It is so much fun is it not? ;^) If it was not for this I would be more than bored. 
 
One thing that I’ve never really understood about this hobby of ours: Why do peps take an awesome shooting PCP and start fuxing it up?? Tuning with FPS and pellet type, weight etc I do understand....but expanding ports, drilling parts, basically re-engineering an already professionally engineered and produced PCP that someone paid $1,000’s for never really made since to me. Now I get it if peps are trying to produce something that is better, patent and resell their idea / technology and invention to make ROI. But sooo often the end result is not optimum and the gun is then off loaded to someone else. Really 1 inch groups at 100 yards or meters is exceptional for what these PCP’s are designed to do, expecting pellet on pellet at 100 yards is simply not obtainable....unless one of these fuxineers makes a 100 yard long barrel.....even then you will not get a 1 hole group the exact diameter of the projectile you are sending!

Just an opinion

Beach-gunner


I have not found to many things in the world that cannot be improved upon from the way they come from the professional engineers and OEM manufacturers. FX and others have taken some the mods we do and incorporated them into their next gen guns. So the guns are constantly and consistently getting better all of the time. Yes, we do mess up sometimes but it's easily fixed and we can go on from there having learned something from the experience.

With the proper tune I have been shooting 1/2 inch groups for the most part at 100 yards with my Gen1 Impact. Now with two more accuracy mods recently finished maybe 3/8ths inch groups are possible? If the world ever stops burning I will get out to the range for some tuning and find out if anything I have done makes things better. I have high hopes that my latest mods will help. If not all I have lost is a bit of time and a few $. Being retired and shut in with the Chinese virus and the world burning I have plenty of time on my hands.

My brother wants to keep everything stock. Me I have not found a product that does not need modified in some way or another. It takes both kinds to make the world a better place.

I may not get that one hole group at 100 yards, although I have got a few three shot one hole groups, but maybe I can get a cloverleaf. ;^)
 
Well that is not looking good Duane, you be careful out there man. 

I was hoping that you were posting up some groups or good news about your tune. 



The smoke from the West Coast is clear over here in Ohio now thanks to the jet stream, and you can even smell it off and on through the day. Kind of freaky, and made me think of you guys out on the coast.