overstuff question

**flair4040** · 11-03-2011, 06:06

I am about to buy a "0" incubator from stormcrow. How does the rating change per ounce if you add overfill? For example, if I get 4oz of overstuff, what will the degree rating become? Thanks.

**raiffnuke** · 11-03-2011, 06:09

That is a very subjective subject, but I will tell you what he (Stormcrow) told me, there is 4oz difference between the 20* and the 0* Phoenix, so I figure roughly 5* per oz of overfill. But this doesn't take into account the change in baffle size. Your personal experience may differ with the amount of overfill.

**flair4040** · 11-03-2011, 08:26

Originally Posted by raiffnuke

That is a very subjective subject, but I will tell you what he (Stormcrow) told me, there is 4oz difference between the 20* and the 0* Phoenix, so I figure roughly 5* per oz of overfill. Your personal experience may differ with the amount of overfill.

So, for the 40z overstuff in the "0" underquilt, I may be close to -20 degrees. Nice.

**bigbamaguy** · 11-03-2011, 08:31

Call Adam and talk to him. He just did a video with Shug where he was using a -15*F Incubator.........see what the overstuff was on that one to see if your calculations are correct once you cross the "Zero Degree" barrier.

**Shug** · 11-03-2011, 08:32

Originally Posted by bigbamaguy

Call Adam and talk to him. He just did a video with Shug where he was using a -15*F Incubator.........see what the overstuff was on that one to see if your calculations are correct once you cross the "Zero Degree" barrier.

22 ounces of down in that UQ.......

**RKP** · 11-03-2011, 08:33

His incubator had 22 oz of down I believe for -15 degrees.

**lazy river road** · 11-03-2011, 11:28

I got a Winter Phoenix and Burrow on order with 3 oz over stuff which I expect to take me right down to zero and below. I got the over stuff cause I am a cold sleeper in winter and wanted the xtra warmth. But remember it's not only the amount of down stuffed into the quilt but also the baffle size and amount of clothing worn. A winter quilt with 4 oz over stuff with proper tarp pitch, insulation etc. I'd imagine would easily take you down to -10 or below depending on how you sleep. YMMV

**kayak karl** · 11-03-2011, 11:53

i asked this question before. doesn't over stuffing start to work in reverse at some point?

**pgibson** · 11-03-2011, 12:04

Originally Posted by kayak karl

doesn't over stuffing start to work in reverse at some point?

Yes, there is a point of diminishing returns. At some point the down gets to where it will not have room to loft. Pack it to tightly into a space and it won't hold warmth as well because there is not room for it to loft up and trap the heat. This will vary from one quilt to another depending on design and the amount of room there is available to fill. Increasing the density of the down over "normal" will help warmth retention to a point, more down in a set space will slow the movement of the heat up until the point you begin to lose lofting ability in the down due to it basically being compressed into the given space.

**OneThing** · 11-03-2011, 17:45

Originally Posted by bigbamaguy

Call Adam and talk to him. He just did a video with Shug where he was using a -15*F Incubator.........see what the overstuff was on that one to see if your calculations are correct once you cross the "Zero Degree" barrier.

Do you have a link to that video by chance? I would be interested in seeing it.