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Old 09-11-2013, 03:58 PM   #1 (permalink)
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High or low dwell for smoothest shot

In some videos, people say that lower dwell equals smoother shot, but some other guides or forum threads claiming that when they raise dwell a bit they get "a smoother shot"

And it comes to a spool with lpr ala DM.

They then say that high dwell and low lpr should be like butter.

Anyone done some experiments with this?
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Old 09-11-2013, 05:35 PM   #2 (permalink)
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Originally Posted by Pimmen View Post
Anyone done some experiments with this?
A little bit, but only enough to tune my own markers.

I do know there is a balance between the moving parts and air pressure, and every marker has its own particular "zone" that makes it work at its best.
That "zone" can be a little higher or lower depending on the user. In general it falls near the middle of maximum & minimum.

Boyles' Law states Volume over Pressure = Pressure over volume.
(one CI of air @ 500psi is = five CI @ 100psi)
It's only when you push it to extremes that mechanical problems show up and you can actually feel a difference in how the marker is operating.
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Old 09-11-2013, 11:08 PM   #3 (permalink)
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It all depends on the gun.

A shocker for example - The dwell doesn't make the bolt push any harder or softer back and forth, it just dictates how long the bolt is held forwards for until it is allowed to be push back again.

For markers with a low pressure reg like a DM - The higher the LPR is set, the harder the bolt is going to move back and forth because there is more pressure behind it. You want to get the LPR as low as you can with it still being able to cycle and not have the bolt stick, then adjust the dwell so it move fully back and forth. So it does kind of have to do with smoothness, but not directly.
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Old 09-11-2013, 11:12 PM   #4 (permalink)
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What's a dwell?
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Old 09-12-2013, 11:46 AM   #5 (permalink)
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What do you mean by "smoother?"
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Old 09-12-2013, 11:47 AM   #6 (permalink)
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Im looking for the least kick and low sound signature.
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Old 09-12-2013, 11:48 AM   #7 (permalink)
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Efficiency isn't an issue because I always fill between points anyway.
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Old 09-12-2013, 11:55 AM   #8 (permalink)
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Quote:
Originally Posted by Hawkeye20 View Post
What's a dwell?
I think springs or something like that.




With dwell it's a balance. Like someone said, mostly things with an LPR.
A single tube spool is normally a dump chamber so dwell doesn't change much aside from BPS if you go too high.

On guns like poppets and spools with an LPR. The higher the dwell the lower the lpr, shorter the dwell the higher the lpr.

You're balancing lpr-dwell-consistency, too high or low of a dwell will cause problems.
But I've found normally bumping the dwell up a couple numbers and lowering your lpr causes a SLIGHTLY softer shot.
Dm's I've owned almost all ran below 2turns on the lpr, and stock is normally 3.5 I think.
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Last edited by JLuke; 09-12-2013 at 11:58 AM.
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Old 09-12-2013, 11:55 AM   #9 (permalink)
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More volume equals less pressure, HVLP. Longer dwell means more air can get in with lower pressure. This means in many markers you get less kick/pop. aka a smoother shot.
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Old 09-12-2013, 11:57 AM   #10 (permalink)
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Quote:
Originally Posted by Hawkeye20 View Post
What's a dwell?
Dwell is how long the valve stays open to let air into bolt behind the ball. Some guns use springs other use electric.
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