hammer slap???
ive been thinkin about this…. is there anyway to quiet down the hammer slap without having to machine anything (i know tony does it but looking for a “home remedy”) i dont have my equipment anymore so it hase to be fairly easy… im not sure were to start??
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i will do that test shortly….. i will warn u though the tuning gets very annoying with the oring… one .001 makes a difference between 10psi per shot and 26psi per shot… and ive also learned that pw wheel and oring size make a huge difference on efficiency… power wheel at 7 i lose every ounce of effieciency i ever had but at 6 its good… the oring just makes it alot more sensitive to adjustment than without…. i will post results soon of my tests..
Wow, amazing 30-shot string! That is as good or better than most regulated valves I have seen. Great job. 1hr fiddling with it and the cost of a 0.070″ rubber o-ring is nothing compared to the end result which is awesome shot consistency and efficiency.
What happens with shots 30 – 40, or 50? Is the consistency still very reasonable? I mean you still have a lot of air left @ 2700psi. I would think you should get a great 40 or 50 shot string, where most of us refill after 25 shots to keep the consistency and POI the same. I am going to the hardware store to get the o-ring tomorrow for my .22 Condor.
yeah i will try to get them those are far more effective than my dime technique ….
get ya one of these anywhere automotive supplies are sold.
http://upload.wikimedia.org/wikipedia/commons/d/df/FeelerGauges.jpg
idk… i dont have measurement tools (im working on getting them) but it is exactaly the thickness of a .070 oring + a dime thats all i can say at the moment…i use different stuff to tune my top hats
So what was the final gap setting for the tophat? 😕 Great shot string BTW.
oh…. yah its a .25….. shooting 25.4 grain jsbs all wieghted and washed…
airgunner:
it wass from the just hammer and top hat… my tank makes a ding that resinates in the air tank it gets very annoying.. i have checked the gap and made sure it wasnt hitting and it wasnt, u mite just not have that problem… but i did and its not there anymore.. but im more impressed with the efficiency of it now…
colster1000,
Hey, I’m confused, is that a .25 caliber shooting JSBs or a .22 caliber shooting 25 grain JSBs ❓
Either way that’s one great tuning job with only 10 PSI per avg. shot and 30 shots with minimal spread.
Great tuning job ❗
Hi colster1000 – why was your top hat dinging ? That could only be because the strike was to hard for the gap. So you still are whacking it to hard, just bouncing off the oring. hmmm… explain that to me.
forgot to mention i played around with top hat gap and pw wheel for an hour to get these #s but it was worth it…
ok here ar my numbers with oring using .25 jsb’s…. 30 shots, start pressure 3000 end pressure 2700 pw wheel at 6….average of 10psi per shot… oring helps alot
1.956
2.940
3.945
4.949
5.943
6.942
7.940
8.941
9.943
10.943
11.945
12.946
13.942
14.943
15.942
16.942
17.946
18.942
19.942
20.943
21.946
22.941
23.945
24.942
25.942
26.943
27.945
28.941
29.943
30.941
average spread is only 5.5 fps id say that good!! and the oring takes away that valve ding…. niceeeeeee… this is perfect for those who want efficiency
airgunner
yah i just stretched it over with som pliers…
gearhead..
my buddies tried to do that it is possible it just takes away the noise dampening aspect… but it does help effinciency alot…
AirGunner1,
The rubber oring can strech like a regular rubber. Or the newer valve stems can be wedged out being careful to not bend it. It can be worrysome re-inserting the valve stem. Just work the oring over the top hat for now.
gearhead,
Would only add cost and may deminish the positive effect of inertia dampening.
What abot maching an oring grove on the back of the top hat ??? Anyone done this
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ok well i did the test i went to 50 shots….. start pressure was 3000psi end pressure was 2500psi so even after 50 shots it still mantained 10 psi per shot…the velocity with .25 jsb’s 25.4 grains was was an average of 941fps with an average spread of 5fps and the lowest velocity recorded was 939 and highest was 947… there was no poi change wats so ever… i could kept going but i dont like dropping below 2500psi so that was all… pw wheel is in same place as earlier… i would say i squeezed as much performance as im gonna get outa my gun…. oh and all pellets were weighted and washed to exacts weights of 25.4 grains and barrel was cleaned before the test…all shots were fired with gun exactly level to give best results on the chrono…. and that concludes todays tests…