matador- fps tuners, assistance please
Hi all,
I am trying to reach 890 fps and Im on my way but I have some questions and would appreciate input from the ones familiar with the regulator and hammer spring tension process.
so…
regulator came marked with “130” (bars I suppose) and its current position in relation to the original 12 o’clock is around 5 o’clock.
increasing tension (HST) lower my fps to around 890 and decreasing the tension takes her up to 930 fps.
If I would continue to losen the HST screw it would soon jump out.
I assume from the above that I have some turning in left to do on the regulator and that 890 fps should be reached by increasing HST up to X fps (peak) and from there it goes down again.
* Is the above assumption correct?
* Did any of you investigate where your fps tops out before backing down again?
Grateful for your input, Q
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Viewing 8 replies - 1 through 8 (of 8 total)
You could always shorten spring a coil or two to get adjuster deeper into block. I also rely on my Matador gauge for chrony work. Remember when filing you will need a slighter higher front side pressure just to open valve on gun to fill it. The gun gauge reads pressure on backside of tank so your CF fill gauge should read a couple hundred psi higher on front side
Well Robert, Im one of the selected few who get to operate a bottle without a pressure gauge… I just fill slowly up to 200 bars – using the matador gauge as the one and only truth.
regarding the HST screw… if you turn CCW it will eventually fall out.
I have a total of 10mm thread on the HST screw and I guess it should be minimum 3mm in (about 2 turns) to be considered secure.
Q
Fill up your R3 to 150 bar, then close the bottle AND leave the probe connected.
You can check the presure on your gauge at the bottle after each shot.
This way you can compare the gauges, mine is 15 bar of.
I never had the problem of turning the hst to much out,
I think you would be the first….
But then again, you’ve had some problems I didn’t see eighter… 🙂
Good luck!
Regards, Robert.
Ok, where would a good starting point be for the HST screw… or better yet, what is the minimum depth of the HST screw for it to be considered secure in its position?
How can I check at what pressure its going of reg if not with the onboard pressure gauge? and what pressure should I aim at?
Thanks, Q
Hi Q,
When you’ve adjusted the reg, first turn the hst two whole turns lose.
Then work your way up a 1/4 turn (or 1/8 turn if you’ve got the time) each time to the speed you want.
Check the presure when your R3 is going of reg, not with the gauge on the tube.
Regards,
Robert
Hi and thanks for your input,
yes – turned regulator CW, from 12 position to 5 position.
I have a .25 cal, not a .22 and when I first got the rifle it was shooting at around 950 fps.
increased HST seems to increase fps up to a certain level and after that it has some sort of negative effect and fps decreases even though you are increasing HST…
I have experimented with the HST (at my current 5 o’clock regulator position) and I can shoot at 890 but Im on the “wrong side”… dont know if that makes sense.
I will turn regulator to 7 and work my way up instead of like now, down.
First l’ll assume 18 grain JSB pellets as well as a few thousand shots broken in. Starting shot string at same fill pressure ie 200 bar?
Second- did your turn regulator screw clockwise from 12 towards 5 (lowers Bar=lower Fps=flatter shotstring ) or counterclockwise(increase bar=increase fps= creates hump in shot string)? If you turned clockwise to 5 you should definitly be under 890 range max.
Turning in HST clockwise increase fps up to where reg chokes it off, if I’m reading you’re post correctly you saying its decreasing fps.
1/4 to 3/8 turn in on reg seems common on R3 to get them to 870-890fps range. You should not be seeing any hump(bell curve) in your shot string or inconsistent spikes if regs working correctly.
Take your reg out Make sure internal/external orings ok and that whole valve body assembly is together nice And snug. I could originally disassemble mine with light finger pressure.
When I adjusted reg, if using clock face as reference, each hr resulted in appx 15fps reduction and curve became flatter.
What’s your shot string look like now?
Viewing 8 replies - 1 through 8 (of 8 total)
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Hi Q,
Could you make some pics of the situation?
If you take the parts of your old adjuster and the new one, to compare.
If you have only the gauge on the tube, I can not help you futher on the presure thing.
The valve on gun is just an o-ring, I don’t think the presure needs to be a lot diferent on the inside of the tube or the filling gauge.
For sure not the 15 bar of mine…
Maybe Ed him selfe knows how much of a diference it can be.
Regards,
Robert