Low Pressure Mod for Xvalves ?

[BigEvil]

instead of having the sear reset by a high pressure difference behind it, might it be magnetically assisted to lower the necesaary to reset pressure?

That issue can probably be bandaged by having a two way noid or ram. Push and Pull. But then you might have timing issues with the on/off pin.

[SlartyBartFast]

If efficiency means more shots per fill, TK has said it before. The answer is HIGHER chamber pressures.

There was a thread about filling the chamber to attain this.

If you want to shoot lower into the tank, why? How low you go into the tank is only important in two cases:
1 - you actually get more shots per fill.
2 - your field can't give you decent HP fills.

[nicad]

The sear does not requite a "certain" amount of pressure to operate.
The lvl7 mags ran at 380-400 psi for 300fps.
the lvl10 can require as much as 600psi for 300fps.
This is what the chamber runs on just to get the ball up to velocity.. anything extra you give it in a higher output tank will start affecting the reactivity, recharge rates, etc.

What was changed from the lvl7 to lvl10 to require the higher pressure?
smaller bolt stalk -> more restriction on air flow to fire ball requires more pressure to ge past the restriction. The bolt spring was optionally upped as well, so more force to overcome that requires more pressure.

At 0.55ci, the mag _should_ be able to run at 300psi if all of that air is used and done so with a high enough flow rate.

[hitech]

At 0.55ci, the mag _should_ be able to run at 300psi if all of that air is used and done so with a high enough flow rate.

Yup. We just need longer effective length barrels.

[RapidTransit]

Has anyone ever looked into making the power tube ID bigger with a new bolt. Maybe someone can jump in with a good surface area vs pressure formula. Heres a wild idea with an adjustable air chamber size start the day with HP, and a very fast recharge rate and as the Air dwindles adjust the chamber for more volume o get deeper into the tank.

If the chamber were smaller and the inner diameter increased of the power tube increased, would this cause faster recharge rates and less air?

[hitech]

Has anyone ever looked into making the power tube ID bigger with a new bolt...If the chamber were smaller and the inner diameter increased of the power tube increased, would this cause faster recharge rates and less air?

I believe that would all work. However, making it is a lot more invloved than it may sound at first. You still need enough room between the inside wall of the bolt and the power tube that it doesn't become a restriction. To get it all just right might require custom sized orings, resulting in a higher cost. But, yeah, I think it would work. If I win the lottery I would try that as an one of my projects to improve the 'mag...