Sweetspotting, Volume & Springing

[Toestr]

Ok, so from my understanding sweetspotting is the pressure at which additional pressure no longer imparts additional energy to the ball because that additional pressure also closes the valve sooner. Therefore the sweetspot pressure is the most efficient pressure for the valve. So my question is how does springing and volume play a role in efficiency? It seems changing those would just change the pressure at which it sweetspots?

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[iamthelazerviking]

Yes the "sweet spot" would also depend on springs. If you swap out springs, you should re-sweet spot the reg. If you change hammer and or valve, redo it.

However, I'm using a WGP pre-set reg that someone else had sweet spotted for a somewhat different lower tube. I'm using stock WGP hammer and valve with ACP balanced springs and haven't touched the reg. It has yielded outstanding results as-is so just going to leave it alone.

[Toestr]

Yes the "sweet spot" would also depend on springs. If you swap out springs, you should re-sweet spot the reg. If you change hammer and or valve, redo it.

However, I'm using a WGP pre-set reg that someone else had sweet spotted for a somewhat different lower tube. I'm using stock WGP hammer and valve with ACP balanced springs and haven't touched the reg. It has yielded outstanding results as-is so just going to leave it alone.

Thanks. My question was more to do with how can springing, volume, hammer weight etc effect efficiency if a valve is sweetspotted?

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[Spider!]

Sweet spotting is really just about consistency, making valve dwell time part of velocity regulation. It does imply that you are not wasting gas on high velocity, which is more noticeable with co2.

Include in your list of effects bolt shape, barrel bore and barrel length.

They was some nice research in the past, maybe still on automags.org in the deep blue section. Iirc, the most efficient shot results from a high impulse at the bolt face. Unfortunately, we used to blow up a lot of paint on the bolt face of high pressure markers.

With hPa, the inconsistency associated with being off of the sweet spot is usually not so bad. You can tune for a short high pressure shot, but one weak ball can ruin your gains.