Doug valve, E-tac, regulator (JDS or otherwise)
Is it possible to use Doug’s valve, an E-Tac (not E-TacReg), and a 3000psi JDS regulator? Have a 257 TD and was looking to regulate the airflow to get more consistent shots with a 4500 psi tank.
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Thanks
Now I just have to figure out how to build a regular that will work.
Awesome Build Doug. Outstanding work as usual. 😀
The plates are screwed on. They are there to cover up the frame on this gun. With the solid scope rail and the trigger guard that the frame sits in the covers probably don’t do much besides make it look nice.
Once anodized I will put green loctite on the backs when assembling and red loctite on the screws that hold them on.
That is quite the pre-chamber Doug! With that kind of pressure I suppose you do need that volume to be released all at once. I assume it would slow way down to go through the valve PLUS having the valve close to soon!
Nice Job!
Also, Do the side plates that cover the scope area are they solid and just epoxied together for stability? I don’t see any assembly screws?
Thanks, Rick
u da man, Doug…thank you for the update…I have the same tank, nice and compact…looking forward to you figuring it out
Answer is no.
I built a setup for EBR. I finished it and gun mods at 11:30 pm and had to leave at 2:45 am for AZ. I spent 3 days shooting there and gave up and shot the .308.
The problem is the regs. They do not work when set to 3000 psi. We had 2 different setups with JDS and a Ninja reg and both guns had the same problem. When tank is at 4500 psi chamber pressure was 3200 psi. As tank pressure dropped so did the chamber pressure. It would take letting it set and watching the gauge on the chamber creep up. Problem was as tank pressure went down it wouldn’t go all the way back to 3200 psi. 200 psi is like 4-5 inches at 200 yds.
Here is what I built. I have about 20 hrs into this in my lathe and 2 miniutes in my friend Tom’s CNC mill to finish the one spot I couldnt. It is a 20 ci chamber. That’s 327 ci. It was built for a 4500 psi fill at 3:1 safety factor. Right now I made a reg blank and just use it as a 88 ci tank setup that I can fill to what ever pressure I want works good at around 3500 for around 20 shots that are real consistent. I will figure out and build a reg that will hold a consistent pressure and fast recovery.
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Super cool man, glad to see your still at it.