8 replies to this topic

[randomness]

I have a palmer's female stabilizer, a rear velocity adjuster, and the BT-4 spring kit.

I understand how you are supposed to sweet spot a regulator. My question is, which colored spring do I use in my marker to sweet spot my regulator?

[side-effects]

Due to the size and flow of the valve that is designed to operate at high pressure it is not going to sweet spot like a reg on a cocker or low pressure gun.

It is a juggling act between the FVA, RVA, main spring and reg pressure. I would wind the FVA all the way out.(not out of the gun just out far enough that it is not a restriction in the power tube) leave the black spring in it with the RVA half way out. Drop the reg pressure until you shoot close to your desired FPS and fine tune with the RVA. If you can't get the velocity low enough before it starves for air go to the green (i believe) spring. If you can't get it high enough or you end up with the reg at almost max output go to the red.

[Tomcat]

Are you using CO2? Air?

[randomness]

side-effects, on 12 April 2012 - 04:22 PM, said:

...leave the black spring in it with the RVA half way out. Drop the reg pressure until you shoot close to your desired FPS and fine tune with the RVA. If you can't get the velocity low enough before it starves for air go to the green (i believe) spring. If you can't get it high enough or you end up with the reg at almost max output go to the red.

Thanks... I've been reading about this everywhere I can (pbn, techpb, a5og, etc...). Some places tell me, go with the lightest spring (blue). Others say go for the stiffest (red). Since I am getting contradictory information, I am not sure which advice to follow.

Tomcat, on 13 April 2012 - 06:24 AM, said:

Are you using CO2? Air?

I'm running CO2.

[side-effects]

randomness, on 13 April 2012 - 12:04 PM, said:

Thanks... I've been reading about this everywhere I can (pbn, techpb, a5og, etc...). Some places tell me, go with the lightest spring (blue). Others say go for the stiffest (red). Since I am getting contradictory information, I am not sure which advice to follow.

Well you could probably get it to work with either, so both technically are right. I spent a bunch of time years ago messing around with this same thing. After all was said and done the benefit  was so small that it made all the time I spent worthless. Stock spring, stock pressure works every time. No BS. I'm not saying don't give it a try just don't expect to be amazed.

[randomness]

Thanks, I'm not expecting phenomenal results. The basic design of the CVX valve doesn't lend itself well to being air efficient. But, I have a slightly unorthodox setup that I'm trying to fine tune; so I need every bit of efficiency I can squeeze out of my marker.

[side-effects]

Well if you are looking for that little bit extra, you are on the right track. Make sure to let us know how you make out.

[randomness]

Thanks for all the help! I opted not to worry too much about sweet spotting the regulator; instead I'm using it like a velocity adjuster. Also, thanks for helping me keep things in perspective.

As much as I want to make my limited paint set-up as efficient as possible, I need to realize the inherent limitations that the CVX valve causes.

[Dorian Feyd]

What the Stab will mostly do is control pressure spikes and lows with C02. I think you want to set it up with a reg checker at the correct input level. As for getting better performance out of a BT polish the internals and upgrade the PT to an aluminum one with a delran bolt. the lighter the spring you get it to work with while still making field velocity will be the best on gas it will be. Good luck, Feyd..............