Full boil on a extract batch - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Extract Brewing > Full boil on a extract batch

Reply
 
Thread Tools
Old 02-14-2013, 07:01 PM   #1
steber
Recipes 
 
Nov 2011
Kingston, Pennsylvania
Posts: 314
Liked 16 Times on 14 Posts



So I've searched this topic and i'm finding very incosiestent results. I have a brewers best american cream ale kit laying around and I figured I'd brew up a extract kit instead of breaking out all the AG gear since my schedule is busy.

Since I have the equipment I'd like to do a full boil for better hop utlization and less harshness in the malt. Is there a formula to cut back the hops to get the same IBUs? Also, do I follow the LME, DME, dextrose additions per receipe or adjust that too?

Heres the ingredients

BOIL SIZE: 2.5

FERMENTABLES
3.3 lb. Extra Light LME 60 min
2.0 lb. Pilsen DME 20 min
1 lb. Corn Sugar 20 min


HOPS
1.25 oz. willamette Bittering 60 min
1 oz. willamette Aroma 10 min

Top off to 5 Gallons
--------------------------------------------------------------


As stated above I want to do a 5 gallon boil, not the 2.5 gallon.
__________________
Quote:
This is grain, which any fool can eat, but for which the Lord intended a more divine means of consumption... Beer!

 
Reply With Quote
Old 02-14-2013, 07:14 PM   #2
Yooper
Ale's What Cures You!
HBT_ADMIN.png
 
Yooper's Avatar
Recipes 
 
Jun 2006
UP of Michigan, Winter Texan
Posts: 69,731
Liked 8009 Times on 5598 Posts


You don't need to adjust the hops, really. But you could if the bittering hops you have are a higher AAU than you want for your bittering.

It used to be thought that hops utilization was impacted by wort gravity, but it's been proven wrong. What does impact the IBUs, though is "topping off". So, if you have 2.5 gallons of 50 IBU wort, and add 2.5 gallons of water (0 IBUs) the IBUs will be halved.

For a cream ale, I'd probably target 15-20 IBUs, so 1.25 ounce of bittering hops may be too much for either a full boil OR a partial boil, depending on the hops.
__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006

 
Reply With Quote
Old 02-14-2013, 07:27 PM   #3
steber
Recipes 
 
Nov 2011
Kingston, Pennsylvania
Posts: 314
Liked 16 Times on 14 Posts


Oh, I'm sorry I just realised I didnt mention that. They are both willamette additons. Just to add, they receipe shown is for a 2.5 gallon boil. Which I want to do a 5 gallon boil with. So essentially, by the logic given, I should half my hop additions on a full boil since the IBUS would be havled if i were to follow the directions?

If gravity doesn't matter, I suppose I could just use beer smith as if I were doing a AG batch, just to see what IBU range I'm in?
__________________
Quote:
This is grain, which any fool can eat, but for which the Lord intended a more divine means of consumption... Beer!

 
Reply With Quote
Old 02-14-2013, 08:02 PM   #4
VampireSix
Recipes 
 
Jan 2013
Posts: 71
Liked 2 Times on 2 Posts


Quote:
Originally Posted by Yooper View Post
It used to be thought that hops utilization was impacted by wort gravity, but it's been proven wrong.
When did this happen? I was under the impression that adding only some extract at the beginning of a partial boil would help boost IBUs to compensate for the top-off water.

 
Reply With Quote
Old 02-14-2013, 08:21 PM   #5
Weezy
HBT_SUPPORTER.png
 
Weezy's Avatar
Recipes 
 
Jan 2013
Pittsburgh, PA
Posts: 1,852
Liked 343 Times on 244 Posts


info on hop utilization is here:
http://www.howtobrew.com/section1/chapter5-5.html

[deleted misinformation...sorry for confusion!!]

 
Reply With Quote
Old 02-14-2013, 08:59 PM   #6
VampireSix
Recipes 
 
Jan 2013
Posts: 71
Liked 2 Times on 2 Posts


Quote from the section of Palmer's book that you linked:

As you will see in the next section, hop utilization decreases with increasing wort gravity. The higher concentration of sugars makes it more difficult for the isomerized alpha acids to dissolve.

So, the more watery (as far as gravity goes) the boil, the BETTER the hop utilization.

 
Reply With Quote
Old 02-14-2013, 09:07 PM   #7
steber
Recipes 
 
Nov 2011
Kingston, Pennsylvania
Posts: 314
Liked 16 Times on 14 Posts


And yet again as stated before the confusion and contradicting answers continue.. more over, my dilemma also is that I'm adding fermentables at different times.. my gravity from 60-20 is different from 20-flameout. Not to mention boil off rate which will constantly change the gravity as well.
__________________
Quote:
This is grain, which any fool can eat, but for which the Lord intended a more divine means of consumption... Beer!

 
Reply With Quote
Old 02-14-2013, 11:51 PM   #8
Adrenaline-Junkie
Recipes 
 
Nov 2012
Posts: 147
Liked 12 Times on 10 Posts


To be honest its getting way over thought in my opinion.

 
Reply With Quote
Old 02-15-2013, 12:00 AM   #9
steber
Recipes 
 
Nov 2011
Kingston, Pennsylvania
Posts: 314
Liked 16 Times on 14 Posts


Quote:
Originally Posted by Adrenaline-Junkie View Post
To be honest its getting way over thought in my opinion.
Agreed, have a simplistic answer? Is it as easy to just say half the hops if doing a full boil instead of topping off?
__________________
Quote:
This is grain, which any fool can eat, but for which the Lord intended a more divine means of consumption... Beer!

 
Reply With Quote
Old 02-15-2013, 01:09 AM   #10
Yooper
Ale's What Cures You!
HBT_ADMIN.png
 
Yooper's Avatar
Recipes 
 
Jun 2006
UP of Michigan, Winter Texan
Posts: 69,731
Liked 8009 Times on 5598 Posts


Quote:
Originally Posted by VampireSix View Post
Quote from the section of Palmer's book that you linked:

As you will see in the next section, hop utilization decreases with increasing wort gravity. The higher concentration of sugars makes it more difficult for the isomerized alpha acids to dissolve.

So, the more watery (as far as gravity goes) the boil, the BETTER the hop utilization.
His book is outdated. In about 2008, he came out and said he "got it wrong' in How to Brew, and that he knows that utilization is indeed independent of wort gravity. There are more updated podcasts and writings by Palmer concerning this.


Quote:
Originally Posted by steber View Post
Agreed, have a simplistic answer? Is it as easy to just say half the hops if doing a full boil instead of topping off?
No. Reduce them by 20% if you feel you have to do something, otherwise don't adjust.
__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006

steber Likes This 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
full boil small batch vs partial boil larger batch? bfinleyui All Grain & Partial Mash Brewing 30 12-13-2012 06:23 PM
half batch full boil same as full batch partial boil? Firechicken Beginners Beer Brewing Forum 5 10-15-2012 09:53 PM
Full Boil Extract Boil with question on batch volumes tjashing Extract Brewing 11 05-02-2012 03:19 PM
Extract Full Split Boil vs Large Boil with Top Off robanna Beginners Beer Brewing Forum 6 04-20-2012 04:41 PM
extract partial boil to full boil questions... smithnick0 Beginners Beer Brewing Forum 17 04-25-2011 09:46 PM


Forum Jump