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-   -   S-04 ale yeast fast fermentation (http://www.homebrewtalk.com/f163/s-04-ale-yeast-fast-fermentation-358262/)

Jeepinctbrewer 10-02-2012 02:36 PM

S-04 ale yeast fast fermentation
3 Attachment(s)
just brewed a partial mash NB oatmeal stout with s-04 yeast SG 1049
i noticed the fermentation on this one is really fast, the krausen was only there for a day. still bubbling away. temp is around 67 deg
pitched yeast around 2 pm on sunday, is this normal for this yeast? thanks

ersheff 10-02-2012 05:02 PM

Haha. Man, I just had a monstrously quick fermentation with S-04.
Of course, I have no idea what my pitching temp was because my thermometer was all over the place. But it was definitely high!
Also got up to 72F in the room overnight.
Anyway, krausen was gushing out the top by the next morning, but all visible activity (sans an occasional airlock bubble) stopped but the time I got home from work!
Strangely enough, I've got krausen gunk stuck all over the glass in the bottle's headspace, but I attribute that to the fact that it was a BIAB batch with no straining (tons of trub).

kh54s10 10-02-2012 05:05 PM

The krausen may be gone but that doesn't necessarily mean your fermentation is finished. You will need to take gravity readings to know that.

Jeepinctbrewer 10-02-2012 05:20 PM

Ok thanks, it's going to be in the primary for two weeks, and secondary for 2-4 weeks

duckmanco 10-02-2012 07:13 PM

It's completely normal for that (and most English strains I've found) to be fast and vigorous fermentors that chew through wort like none other. That kit recipe is fantastic by the way, you'll love it. I went through my PM version keg way too quickly.

Jeepinctbrewer 10-02-2012 07:36 PM

Figured it would be ok, I just ask Bc I did a esb with the same yeast, and it fermented a lot longer

jfr1111 10-03-2012 12:17 AM

S-04 is usually done in two to three days from the first signs of fermentation for 1.040-1.045 beers for me. It's also one of the worst yeast when it comes to the fermentation running wild: you really have to keep it in check or it'll get higher than 70F, which is, for most people, the very tail end of what I'd recommend. It gets very estery, and not necessarily in a pleasant way for most beers when it is fermented warm.

Jeepinctbrewer 10-03-2012 02:22 AM

It's stayed 70 deg

Jeepinctbrewer 10-03-2012 03:11 PM

nope i was wrong the last yeast i pitched was us-05 in a pale ale, that one fermented a lot longer then the 04

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