Boil Vigor - Home Brew Forums
Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Boil Vigor

Reply
 
Thread Tools
Old 03-07-2007, 12:31 PM   #1
WormBoy
Chief Bottle Washer
HBT_LIFETIMESUPPORTER.png
 
WormBoy's Avatar
Recipes 
 
Feb 2007
Islip, New York
Posts: 332



I had a question about how "hard" of a wort boil is preferred. I have my kettle on my kitchen stove (gas). Its a 32 qt SS and it sits over two medium sized burners. With the cover on it creates a good rolling boil. My question is this, I was brewing with a friend last weekend, and he thought we should keep the cover on so that the boil was a good hard boil. I tend to keep the cover off, and the boil is much less rolling. I had read that you want the cover off. Is there any problem with a less vigorous boil?


__________________
Fermenting: My desire to brew!

 
Reply With Quote
Old 03-07-2007, 12:41 PM   #2
Kadmium
Recipes 
 
Jan 2007
Melb, AUS
Posts: 169

A less vigorous boil will give you less hop utilization (bitterness) but more aroma / flavour. A higher boil will give you more utilization, but less aroma / flavour. Keeping the cover on is a bad idea, as hot wort is producing diacetyl (butter scotch / popcorn taste) which can be nice in some beers (cream ales) but is usually a bad thing, and can become over powering and rancid. Keeping the cover on means the diacetyl is not evaporating and is simply falling back into your pot. It is allways a good idea to boil your wort with the cover off.

just my 2 cents...



__________________
Have a good one mate, K

Primary: Nierra Sevada

Carboy1: Sanitizer
Carboy2: Sanitizer

Kegged - Burnt down the Hause ale

 
Reply With Quote
Old 03-07-2007, 03:42 PM   #3
AdIn
 
AdIn's Avatar
Recipes 
 
Dec 2005
Sammamish, WA
Posts: 306
Liked 2 Times on 2 Posts


Good rolling boil also required in order to coagulate proteins in your wort and create good hot break material. As Kadmium said it also required to get rid of diacetyl, for that boil with 10-15% evaporation rate should be good enough. It means you can have cover partially on as long as you provide correct evaporation rate. And try to avoid condensations from the cover dripping back in to your wort.
__________________
Non-alcoholic beer is a first step to a rubber woman

 
Reply With Quote
Old 03-07-2007, 04:40 PM   #4
AdIn
 
AdIn's Avatar
Recipes 
 
Dec 2005
Sammamish, WA
Posts: 306
Liked 2 Times on 2 Posts


Small correction, get rid of DMS, not diacetyl. Diacetil is a product of fermentation.
__________________
Non-alcoholic beer is a first step to a rubber woman

 
Reply With Quote
Old 03-07-2007, 05:09 PM   #5
david_42
 
david_42's Avatar
Recipes 
 
Oct 2005
Willamina & Oak Grove, Oregon, USA
Posts: 25,593
Liked 151 Times on 142 Posts


So long as large bubbles are breaking the surface constantly, you should be fine.
__________________
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"

"I would like to die on Mars, just not on impact." Elon Musk

 
Reply With Quote
Old 03-07-2007, 06:35 PM   #6
Reverend JC
2500 gallons year to date
HBT_LIFETIMESUPPORTER.png
 
Reverend JC's Avatar
Recipes 
 
Jun 2006
Your Mom's
Posts: 1,880
Liked 3 Times on 3 Posts


My food science sister inlaw said that a boil is a boil. Vigor with reguards to boil mearly tells you how much liquid you will lose due to evaporation and as stated earlier, hop utilization.
__________________
"Just because i don't care dosen't mean I don't understand." -Homer Simpson


http://www.modernmonks.com

 
Reply With Quote
Old 03-08-2007, 05:24 PM   #7
WormBoy
Chief Bottle Washer
HBT_LIFETIMESUPPORTER.png
 
WormBoy's Avatar
Recipes 
 
Feb 2007
Islip, New York
Posts: 332


Thank you all for your replies. Glad to hear that the boil does't have to be all that vigourous, because my two burners at full blast with the keetle cover off can't do better.
I guess what I have been struggling with is that my buddy has 25+ years brewing experience and sometimes I find info like this that conflict with his advice and I find myself tip toeing around some things. I guess its a balance. Well, I'm glad to have the advice. And between his advice and my learning, I guess I will work it out.
__________________
Fermenting: My desire to brew!

 
Reply With Quote
Old 03-08-2007, 05:29 PM   #8
olllllo
[]-O-[]
HBT_LIFETIMESUPPORTER.png
 
olllllo's Avatar
Recipes 
 
Apr 2006
Phoenix, Arizona
Posts: 13,330
Liked 139 Times on 113 Posts


Quote:
Originally Posted by WormBoy
Thank you all for your replies. Glad to hear that the boil does't have to be all that vigourous, because my two burners at full blast with the keetle cover off can't do better.
I guess what I have been struggling with is that my buddy has 25+ years brewing experience and sometimes I find info like this that conflict with his advice and I find myself tip toeing around some things. I guess its a balance. Well, I'm glad to have the advice. And between his advice and my learning, I guess I will work it out.
That's why I like this board. You can have 25 years of experience, but a practice that could be improved but isn't, is just that- a poor practice, no matter how many times or years you do it.


__________________
Rabbit And Coyote Schwag
Rob - Phoenix Ambassador to Milwaukee
Where did your avatar go?
Ginger Beer for Moscow Mules Bacon Vodka
Twitter

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
full 5 gal boil - recipe calls for 2.5 gal boil - hops ammounts? vthokie98 Beginners Beer Brewing Forum 1 12-10-2012 09:40 PM
Calculating wort expansion along with pre and post boil boil volumes greggor General Techniques 4 10-23-2009 12:01 PM
Boil vigor maltMonkey General Techniques 8 04-25-2008 01:33 AM
boil vigor scohop All Grain & Partial Mash Brewing 3 06-17-2007 03:11 AM
Brew Vigor Dark_Ale Recipes/Ingredients 1 02-11-2005 01:44 PM


Forum Jump