JSAR SS Valve is better than ever!

[triggertreat]

I got my SS valve back after sending my older version in to JSAR for the latest upgrades to it. Man am I happy with the initial tune results I got today.

I ran the same hammer and spring setup I used for my signature tune that I ran many months ago and was able to repeat it and even better it by a little bit.  I did use a smaller jet this time (Mikuni 87.5) .0370" verses the .0600" I used before, which increased the efficiency from 1.45 to 1.49 FPE/CI.  The ES is slightly lower too at 1.96% compared to 2.08%.  The average FPE is the same as before at 55.94 compared to 55.92 FPE.

The cocking effort is about the same, but I am running a shorter dwell with the smaller jet so I am impressed that I can reach the 56 FPE mark with a shorter dwell time using the same hammer and spring setup.  My spring lengths are customized by me.  I use the original TSS and I also have a gap on both springs.  I customize the lengths only because I want my TSS adjustments flush with the end cap as I use my thumb to cock the gun.  They are heavier rated springs than most use, but I use what it takes to allow a gap, reach 56 FPE, use a lighter than stock hammer and have a smooth thumb press.  It's still fairly easy to cock with all of that going on thanks to the balanced valve.

I don't know everything that was done to the valve.  I know some work was done to the seat area and the spool.  I did notice it sealed up immediately as soon as I cracked the tank valve open which is different than the old valve which took near 2000 psi to seal.  I bet this one doesn't leak, but am testing overnight to be sure.  I'll also be checking for first shot sticksion issues coming up, but am feeling good about that too as I was checking by hand every few hours before installing it.  Very pleased overall so far.

Looking at the string, I'm fairly confident I could come close to a 40/50 tune under a 4% ES, but am not really interested being it's used as a long range hunting gun.

I've got to thank JSAR for all of their efforts in upgrading my SS valve.  It was a fast turnaround and I was notified that it was on the way back to me by Jason I think it was, and Travis also checked to make sure I had received it  Very good support from the JSAR staff!

[Motorhead]

That's great news and really great if the sticksion issue is no longer !

I'm real close to revisiting my SS valve soon as my Nielson sampler pack of .177 slugs get here later in the week.

[KnifeMaker]

Looks good Keith!


Scott you know I will be watching with interest. My .257 barrel is with them now for an O ring groove in the breach. Looking forward to see what it will do in the Rainstorm. It was very accurate in the Talon/Dor with heavier bullets, Soooooo---

[oldpro]

 Sweet the mods are working! Im going to change the CNC program to incorporate this in future valves.

[mann]

Cool I'm glad the upgrades are help you. I believe I'm running the same jet in mine 87.5 let us know about the sticktion

[triggertreat]

The good news is my gun hasn't lost a drop of air overnight and all day today with the new SS valve.  I'm very happy about that.  It's been awhile since I've seen that.


The bad news is I got water in my chronograph today and it's not working correctly to test for sticksion issues.  All I can say for now is the first shot sounded like the second and so forth.  I do have the display working again, but I get errors still when shooting across it.  I will continue to try and dry it out.


What happened to the chronograph?   When I was unlocking my shed, my sippy cup tilted and poured water down into the sensor.  Stupid mistake,  but I'll press on.

[KnifeMaker]

Sounds like one of my days.


My Wife set up the package for JSAR, and left the check out for the shipping return. I need to apologize and call for instructions. GRRRRRR!!!


Just as much my fault as hers. Well, mostly mine. LOL!!!


I got kinda fed up with my old Chrony, and sorta shot it. By accident I swear!


The new Caldwell is much better. I enjoy it, and particularly the seeming lack of errors showing up. The old Chrony gave as many errors as readings. LOL. 


Knife

[skorec]

Sweet the mods are working! Im going to change the CNC program to incorporate this in future valves.

Travis , 
 
SS Balanced  valve is perfect and  it is also  improving day by day  but unfortunately you have forgotten  to send me some upgrade for my Puncher valve.  Also I have no any PM answers from you.
Probably you are  too busy ? 

Peter

[triggertreat]

Sounds like one of my days.


My Wife set up the package for JSAR, and left the check out for the shipping return. I need to apologize and call for instructions. GRRRRRR!!!


Just as much my fault as hers. Well, mostly mine. LOL!!!


I got kinda fed up with my old Chrony, and sorta shot it. By accident I swear!


The new Caldwell is much better. I enjoy it, and particularly the seeming lack of errors showing up. The old Chrony gave as many errors as readings. LOL. 


Knife

I have the ProChrono Digital.  I like it, but if I can't get it going, I may order a Caldwell.  A lot of people seem to like them, and I wouldn't have to manually type out my numbers anymore.  The Free Spreadsheet also has a FPS filter for the Caldwell.

[USAFANG6799]

+1 for the Caldwell vs ProChrono.

[triggertreat]

+1 for the Caldwell vs ProChrono.

Have you had both, and if so why is the Caldwell better?

[PCPhack]

Were there updates to the design to avoid stiction?

[tracker1955]

Keith, if you need to you can borrow my Caldwell, I'm not using it at the moment. You can get a free app for a smart phone or Ipad and plug the chony right in to it, I use it with my old Ipad.

[triggertreat]

Keith, if you need to you can borrow my Caldwell, I'm not using it at the moment. You can get a free app for a smart phone or Ipad and plug the chony right in to it, I use it with my old Ipad.

Thanks Tom!  I may do that if I can't get mine going today.  I want to answer the stiction question we all have.

[Dairyboy]

Keith, buy this one and don't look back!

[triggertreat]

Ok, my chronograph is back in business.  Thanks for the offers and suggestions!


First shots this A.M.

• 819
• 855
• 846
• 860

Shots four hours later

• 814
• 847
• 863
• 857

So there seems to be a little stiction, but not too bad.  It may very well be the heavy silicon grease I applied to the O-rings.  Also, these O-rings are brand new and have at most 50 shots on them since I got the SS valve back from JSAR.  Time will tell.  personally I am very happy with this new valve.  I will continue to test the first shots a few more times.

[PCPhack]

This stiction thing is maddening.  It doesn't matter too much for plinking, but it sure does for hunting.

[nervoustrigger]

i haven’t followed all the details leading up to this point so this may be a dumb question but is this stiction symptom present with unregulated setups?

[PCPhack]

Yes, it can be.

[triggertreat]

i haven’t followed all the details leading up to this point so this may be a dumb question but is this stiction symptom present with unregulated setups?

Good question, but I couldn't say.  Mine is regulated.