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-   -   Is my imperial stout done fermenting (http://www.homebrewtalk.com/f163/my-imperial-stout-done-fermenting-314818/)

strongarm 03-21-2012 03:03 AM

Is my imperial stout done fermenting
OG 1.109
4weeks later SG 1.029

Used wyeast1728 attenuation 69-74%

Looks to me like it's finished out .26X109=1.02834

I usually know this since I buy kits and it tells me but this time I altered the recipe so I wasn't sure. Hope it's ready to rack since I need the bucket for a brew this weekend.

D0ug 03-21-2012 03:14 AM

People usually don't advocate racking until the specific gravity is stable for at least three days.

It looks like the apparent attenuation is around 73.3% and the abv is around 10.5%, but that yeast can go a little higher.

I'd go by the gravity readings and not the numbers. Just my 2 cents.

I really like the 1728 by the way, I used it on a wee heavy and fermented at the very low end of the recommended temperature range. It gave a nice smoke flavor to the brew with out using any peated or smoked malts. It was kind of neat.

spenghali 03-21-2012 05:19 PM

Take a gravity reading 3 days apart, just because wyeast lists its attenuation range of 63-74% doesn't mean it can't attenuate higher, there are many factors that contribute to attenuation.

phenry 03-21-2012 05:42 PM

There's almost no reason to rush an Imperial Stout. I would check the gravity a week from now, and if it's the same then feel free to bottle/bulk age in secondary.

chuckstout 03-21-2012 06:13 PM

You could just buy another bucket, gives you more reason to brew more often, brew on

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