retro valve efficiency

[AkumA]

yeah yeah yeah..i did a search, but wasn't pleased with the results...so...

how can i reach maximum effiecieny from one fill?

my set up:
emag valve w/ lvl10
72/45 HP preset tank
one piece barrel (bigshot)
doc's mag.cocker adapter

thats about the most relevant things i can list for this thread.

what can i do/change/add/switch to get the most from my tank? im a previous cocker user, and i really liked how i get near 2k shots from one 68/45 tank.

thanks

[ChucktheMAGician]

Using the smallest LX spring and paint that matches well, not to big or small, are the only things I can think of.

[PyRo]

What he said, also you don't want a very long barrel (about 12in), and more porting=less gas efficancy.

[trxtr]

i suggest

ditch the pre-set and get an adjustable tank. without one, you really can't tweak the retro valves' performance too much.

[PyRo]

While I will agree with that, it isn't going to help his gas efficancy. I think 2000 off a 68/4500 before you get below 850psi or so left in the tank is really pushing it.

[AkumA]

im currently using my personal favorite barrel, the lapco bigshot, w/ the right paint. also looking for an autosprit for the right price.

as for adjusting input psi, can i just use an inline regulator? i had a CP reg on my trix, and that did very well for high rof.

[PyRo]

Putting that other reg on there is going to cut down the airflow to the valve. It may cause shootdown, you can try it if you want, but if you have a shootdown problem you know why. The level 10 also seems to like a higher input pressure than the level 7. I wouldn't go out and buy a reg but if you have one lying around it isn't going to hurt anything to try, plus it gives you an excuse to mess with your PB stuff

[athomas]

Don't use another regulator in line.

To maximize efficiency:

- use the shortest spring in the level 10. Even the shortest spring gives very good protection against chops. Using the shortest spring allows the chamber pressure of the mag to operate at about 400psi. This will allow maximum valve efficiency plus allow more air to be used out of the bottle.

- use a barrel that fits the paint you are using.

- use a barrel that has about 11" of unported distance from the breach to the start of the porting. If the porting area is not step drilled then keep the ported length to a minimum.



If you can achieve good efficiency with your mag you should be able to get about 1560 shots out of a 72ci 4500psi tank. The same efficiency on a good low pressure cocker will yield 1700 shots. Most mags using adjustable barrel systems and longer L10 bolt springs will only get about 1200 shots out of the same tank.

[PyRo]

Originally posted by athomas
Don't use another regulator in line.

Id just like to point out I already know this, i'm just saying if he has one laying around it isn't going to hurt anything to give it a try if he wants to reduce his reactivity. If he gets a shootdown problem from it its a five minute process of removing the thing.

[AkumA]

Originally posted by PyRo


Id just like to point out I already know this, i'm just saying if he has one laying around it isn't going to hurt anything to give it a try if he wants to reduce his reactivity. If he gets a shootdown problem from it its a five minute process of removing the thing.

i would, but the hyperline reg has LP springs installed. really don't fell like buying new springs.

if im getting those numbers and listed above, i would be a happy camper (not literaly).

[athomas]

What is the pressure you are running into your mag? You should maintain at least a 200psi pressure differential between the input and the valve chamber. If you use the short L10 spring it should operate at around 400psi. Therefore, you should use at least 600psi input to the mag to maintain a good recharge rate.