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General Category => Extract/Partial Mash Brewing => Topic started by: Bigfundan on January 08, 2010, 12:50:39 AM

Title: More Yeast, Temp boost?
Post by: Bigfundan on January 08, 2010, 12:50:39 AM
I started an approximate version of Imperial Pilsner from Extreme Brewing on 12/26.  Started with an OG of 1.1. Fermentation did not take off for close to a week. ( Storing carboy in 48 degree fridge)  On 1/8 I noticed no more bubbles in the airlock.  Took another hydrometer reading at 60 degrees with 1.060 as the result.  Bubbles started again after I put on another sanitized airlock.  My questions are should I just let it keep going again, should I adjust the temp, and will I need a diacetyl rest before adding the final hops for secondary fermentation.  This is my first batch in over 7 years and don't want to mess it up.  Any help is appreciated.
Title: Re: More Yeast, Temp boost?
Post by: tygo on January 08, 2010, 02:57:24 PM
Your temp is probably a little low.  What yeast did you use?  How big a starter did you pitch?  Warm it up a bit and rouse the yeast and see if that helps.
Title: Re: More Yeast, Temp boost?
Post by: Kaiser on January 08, 2010, 04:25:24 PM
The temp is fine. When I’ll brew a big Pilsner soon I’ll even get it started around 44F (7C). The thinking behind this is to keep the fermentation cold while the yeast is actively growing and would be producing a lot of fusel alcohols. Later when the growth ceased I’ll ramp up the tempo to help the yeast finish. This is more important for high alcohol beers than regular lagers since there is more fusel production during their fermentation.

You didn’t pitch enough healthy yeast. This is shown by the long lag that you are experiencing. To get fermentation going again I’d let it warm up and add more fresh yeast. Maybe even rehydrated dry yeast since they already come fully aerated and with plenty of sterol reserves to withstand the alcohol.

Kai
Title: Re: More Yeast, Temp boost?
Post by: Beertracker on January 08, 2010, 07:29:05 PM
I'd keep it on the warmer side of the recommended yeast range until you get a good krausen then it's OK to turn down the thermostat. The "rule of thumb" is no more than 3° a day. Maybe play it some metal music?   ;D
Title: Re: More Yeast, Temp boost?
Post by: Bigfundan on January 08, 2010, 10:22:05 PM
I used the Wyeast Bavarian lager smack pack.  Boosted the temp up to 52 and noticed more activity.  Thanks for the helpful advice. :)
Title: Re: More Yeast, Temp boost?
Post by: brewhawk on January 10, 2010, 01:44:53 AM
Too late now, but with a  Big A** lager like that, a 1/2 gal. starter culture is appropriate.  Anytime your OG exceeds 1.08 and you want to use any lager yeast, you are better off pitching your yeast into a growler sized starter.  Check out Jamil Zainasheff's website, www.Mrmalty.com, for additional information.

BTW, love the idea of a doppelbock-sized Pils.  Yum!  Gonna have to try that myself.

Brewhawk
Title: Re: More Yeast, Temp boost?
Post by: tom on January 12, 2010, 04:14:01 AM
Actually, for  5 gallons of a 1.100 lager, mrmalty.com recommends using 2 vials in a 13 L starter (over 3 gallons!). I usually do a "5 gallon starter".
Title: Re: More Yeast, Temp boost?
Post by: Travis on January 22, 2010, 08:07:30 PM
Next time think about brewing a 5 gal. 1.035 starter beer first to ramp up your yeast population.  As it turns out, these lower gravity beers are also very popular around my house.
Title: Re: More Yeast, Temp boost?
Post by: a10t2 on January 22, 2010, 08:17:55 PM
Next time think about brewing a 5 gal. 1.035 starter beer first to ramp up your yeast population.  As it turns out, these lower gravity beers are also very popular around my house.

I actually brew 2.5 gallons of 1.040 pilsner as most of my lager "starters". That'll grow 400-500 billion cells, which is fine for a 5 gal batch of lager up to about 1.065-1.070, and you can pitch a fresh smack pack directly. (Or a 1 L starter if you're reculturing.)
Title: Re: More Yeast, Temp boost?
Post by: dhacker on January 23, 2010, 01:54:27 PM
Next time think about brewing a 5 gal. 1.035 starter beer first to ramp up your yeast population.  As it turns out, these lower gravity beers are also very popular around my house.

Is it hopless?

(not hopeless, but hopless)  :)
Title: Re: More Yeast, Temp boost?
Post by: Travis on January 24, 2010, 06:34:59 PM
I do use hops when making a 5 gal. starter beer because I drink it (usually lightly hopped), but not when making smaller starters.