Kegconnection Complete Starter Kit and More Giveaway!


Home Brew Forums > Home Brewing Beer > General Techniques > Diacetyl rest?

Reply
 
LinkBack Thread Tools
Old 02-28-2009, 11:53 PM   #1
zacster
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2008
Location: Brooklyn, NY
Posts: 982
Liked 19 Times on 18 Posts

Default Diacetyl rest?

My lager had been fermenting for 10 days at about 48-50 degrees, sometime even lower, depends on the weather. But yesterday, the temp in NYC peaked at 61. The beer itself was up to 56 in the fermenter. Since it had already cooled down outside I let the beer cool down with it. It is much colder today, so the temp is back down to 52 and probably still falling.

My question is this: Did I get a diacetyl rest by letting the temp go up to 56 in the carboy for about 24 hours? Or does it take longer than that, or needs to be warmer? The fermentation is still going, my gravity reading yesterday was 1.020, it should go down closer to 1.010.

I was hoping to transfer to the secondary this weekend, but I think I'll let it sit another week in the primary. The weather is supposed to stay cold all week so I'll have good refrigeration. I have a mid-April party that this is supposed to be for and my count says it won't quite make it, 4 weeks to lager, 3 weeks in the bottle. Maybe I need to buy a keg setup so I can force carb it.

__________________
zacster is offline
 
Reply With Quote Quick reply to this message
Old 03-01-2009, 03:42 AM   #2
BlindLemonLars
Conqueroo Brew
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
BlindLemonLars's Avatar
Recipes 
 
Join Date: May 2007
Posts: 4,445
Liked 10 Times on 10 Posts
Likes Given: 31

Default

The rest is usually a little warmer, and a little longer, and not done until primary fermentation is essentially done. But if you pitched cold, there may not be any need for a rest. Unless you taste diacetyl at this stage, I wouldn't bother.

__________________
BlindLemonLars is offline
 
Reply With Quote Quick reply to this message
Old 03-01-2009, 03:48 AM   #3
Revvy
Post Hoc Ergo Propter Hoc
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Revvy's Avatar
Recipes 
 
Join Date: Dec 2007
Location: "Detroitish" Michigan
Posts: 40,804
Liked 2711 Times on 1629 Posts
Likes Given: 3484

Default

The rest is usually in the high 60's - 70's (whatever your "room temp" ) is for a minimum of 72 hours...Mine have been between 72 hours and a full week, depending on my schedule...

If you haven't read it, I can't recommend Bm's thread highly enough...http://www.homebrewtalk.com/f13/prev...ghlight=butter

__________________

Like my snazzy new avatar? Get Sons of Zymurgy swag, here, and brew with the best.

Revvy's one of the cool reverends. He has a Harley and a t-shirt that says on the back "If you can read this, the bitch was Raptured. - Madman

I gotta tell ya, just between us girls, that Revvy is HOT. Very tall, gorgeous grey hair and a terrific smile. He's very good looking in person, with a charismatic personality... he drives like a ****ing maniac! - YooperBrew

Revvy is offline
 
Reply With Quote Quick reply to this message
Old 03-01-2009, 03:54 AM   #4
Professor Frink
Feedback Score: 0 reviews
 
Professor Frink's Avatar
Recipes 
 
Join Date: Sep 2006
Location: San Diego, CA
Posts: 3,106
Liked 13 Times on 13 Posts

Default

Like Blind and Revvy said, you probably didn't get a full rest, but not all lager yeasts require diacetyl rests. The best way is just to check the beer when you're about 3/4 through fermentation, you can usually tasted the diacetyl.

__________________
Primary: Cherrywood Smoked Porter
60 Minute IPA
Secondary:
On tap:Amber Ale
Milk Stout

Lagering:


http://www.lazydogbrewery.com
Professor Frink is offline
 
Reply With Quote Quick reply to this message
Old 03-01-2009, 04:16 AM   #5
Kaiser
Feedback Score: 0 reviews
 
Kaiser's Avatar
Recipes 
 
Join Date: Nov 2005
Location: Pepperell, MA
Posts: 3,904
Liked 114 Times on 71 Posts
Likes Given: 4

Default

You should see the diacetyl rest less as a rest soley for reducing diacetyl and more as a warm rest for accelerated maturation and fermentation completion. When I do this rest it is for getting the gravity to the FG such that I can then crash the beer to 34 F and lager for 4-6 weeks. Lager fermentations can be sluggish and the yeas may need that extra help to finish the beer. Otherwise you may end up with a sweeter than desired product.

Kai

Kaiser is offline
 
Reply With Quote Quick reply to this message
Old 03-01-2009, 12:47 PM   #6
bmckee56
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2008
Location: Coraopolis, PA (Near Pittsburgh)
Posts: 926
Liked 4 Times on 4 Posts

Default

Quote:
Originally Posted by BlindLemonLars View Post
The rest is usually a little warmer, and a little longer, and not done until primary fermentation is essentially done. But if you pitched cold, there may not be any need for a rest. Unless you taste diacetyl at this stage, I wouldn't bother.
(sort of) What would "Diacetyl" taste like? I have an Imperial Stout that may have excessive diacetyl and I currently detect something in the flavor (like cleaning solution or chemical flavor), but I am to new and unfamiliar to determine if it is this or something else.

Salute!
__________________
On Tap #1 - East End Brew
On Tap #2 - Nada
On Tap #3 - Nuttin-Honey Ale
Fermenting - BMB's Cascading Citra Ale
bmckee56 is offline
 
Reply With Quote Quick reply to this message
Old 03-01-2009, 12:58 PM   #7
Yooper
Ale's What Cures You!
HBT_ADMIN.png
Feedback Score: 0 reviews
 
Yooper's Avatar
Recipes 
 
Join Date: Jun 2006
Location: Upper Michigan
Posts: 60,360
Liked 4280 Times on 3119 Posts
Likes Given: 825

Default

Quote:
Originally Posted by bmckee56 View Post
(sort of) What would "Diacetyl" taste like? I have an Imperial Stout that may have excessive diacetyl and I currently detect something in the flavor (like cleaning solution or chemical flavor), but I am to new and unfamiliar to determine if it is this or something else.

Salute!
In large amounts, diacetyl tastes like butter, or butterscotch. In small amounts, it may just give you a "slick" or oily mouthfeel or a slick feeling on your tongue.

It's not out of place in some beer styles, but definitely out of place in a lager!
__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006
Yooper is online now
 
Reply With Quote Quick reply to this message
Old 03-01-2009, 01:27 PM   #8
Revvy
Post Hoc Ergo Propter Hoc
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Revvy's Avatar
Recipes 
 
Join Date: Dec 2007
Location: "Detroitish" Michigan
Posts: 40,804
Liked 2711 Times on 1629 Posts
Likes Given: 3484

Default

I mentioned in another thread a couple days ago that I bought a sixer of Rogue Dead Guy, for the first time in awhile...I have had it on occasion in bombers, but decided on a sixer.

5 out of the 6 that I have had so far all taste like butterscotch, heavily of butterscotch...Which is really odd...I haven't noticed it in the bombers I've picked up on occasion...

Strange.

__________________

Like my snazzy new avatar? Get Sons of Zymurgy swag, here, and brew with the best.

Revvy's one of the cool reverends. He has a Harley and a t-shirt that says on the back "If you can read this, the bitch was Raptured. - Madman

I gotta tell ya, just between us girls, that Revvy is HOT. Very tall, gorgeous grey hair and a terrific smile. He's very good looking in person, with a charismatic personality... he drives like a ****ing maniac! - YooperBrew

Revvy is offline
 
Reply With Quote Quick reply to this message
Old 03-01-2009, 02:27 PM   #9
FireBrewer
Feedback Score: 0 reviews
 
FireBrewer's Avatar
Recipes 
 
Join Date: May 2007
Location: Fallston, MD
Posts: 2,035
Liked 13 Times on 11 Posts
Likes Given: 12

Default

Quote:
Originally Posted by zacster View Post
My question is this: Did I get a diacetyl rest by letting the temp go up to 56 in the carboy for about 24 hours? Or does it take longer than that, or needs to be warmer? The fermentation is still going, my gravity reading yesterday was 1.020, it should go down closer to 1.010.
The diacetyl rest is a means for the yeast to clean up after themselves when they're done. So, since in your case the gravity was 1.020, they're not done and it wasn't a diacetyl rest.

Quote:
Originally Posted by REvvy
5 out of the 6 that I have had so far all taste like butterscotch, heavily of butterscotch...Which is really odd...I haven't noticed it in the bombers I've picked up on occasion...
Maybe your palate has just improved? Or maybe it was a bad batch.

I remember reading that the minimum flavor threshold for diacetyl was one of the lowest and that in terms of flaws, it's one of the most easily recognizable. Some flaws I have a hard time picking out but diacetyl sticks out like a sore thumb with me. Blech!
__________________
FireBrewer is offline
 
Reply With Quote Quick reply to this message
Old 03-01-2009, 03:31 PM   #10
Revvy
Post Hoc Ergo Propter Hoc
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Revvy's Avatar
Recipes 
 
Join Date: Dec 2007
Location: "Detroitish" Michigan
Posts: 40,804
Liked 2711 Times on 1629 Posts
Likes Given: 3484

Default

Quote:
Originally Posted by FireBrewer View Post

Maybe your palate has just improved? Or maybe it was a bad batch.

I swear I picked up a bomber of Deadguy a couple weeks ago and didn't notice...I might have to do that...or maybe you are right, and my palate has become more sensitive....the other possibility is that I've become so used to my clones of Dead guy that I've forgotten what the original tastes like....But I still think I got a bad batch....

I know that it can be a result of fermentation, or certain infections...but I wonder of storage issues (like temp shifts or too high a storage) could cause it as well...
__________________

Like my snazzy new avatar? Get Sons of Zymurgy swag, here, and brew with the best.

Revvy's one of the cool reverends. He has a Harley and a t-shirt that says on the back "If you can read this, the bitch was Raptured. - Madman

I gotta tell ya, just between us girls, that Revvy is HOT. Very tall, gorgeous grey hair and a terrific smile. He's very good looking in person, with a charismatic personality... he drives like a ****ing maniac! - YooperBrew

Revvy is offline
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
More on Diacetyl Rest tbone General Techniques 2 08-29-2013 11:24 PM
Diacetyl Rest for Ale KCBrew Beginners Beer Brewing Forum 6 10-10-2009 08:50 PM
Diacetyl rest luv2brw General Techniques 4 07-13-2009 03:22 AM
Diacetyl Rest Glibbidy General Techniques 10 08-30-2006 01:18 AM
Diacetyl Rest Fatboy General Techniques 10 08-15-2005 03:58 PM