Modified BIAB - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Modified BIAB

Reply
 
Thread Tools
Old 06-21-2011, 03:50 PM   #1
Fathand
Recipes 
 
Sep 2010
Warren, MI
Posts: 202
Liked 15 Times on 15 Posts



I am slowing making the move to all grain after several year of extract and partial mash brewing and I have been doing a modified version of Brew in a Bag. I don't have a mash tun built just yet so in the interim I am using an unmodified cooler to mash in and using two 5 gallon paint strainer bags. I did a Hef this past weekend and wished my gravity was a little higher.

Here's what I did...

5 lbs Wheat malt
4 lbs Pilsner malt
1 oz Hallertau (60 min)

Mash at 153 for an hour with 12 quarts of water.
Sparged with additional 12 quarts of water at 170 for 15 minutes
Boil = 60 min

OG I got was 1.040. At the very low end of the range.
I did double crush the grains because I read that it helps increase the efficiency of BIAB.

What can I do to increase my gravity?

 
Reply With Quote
Old 06-21-2011, 03:54 PM   #2
commonsenseman
Recipes 
 
Feb 2011
White Bear Lake, Minnesota
Posts: 553
Liked 2 Times on 2 Posts


I am in a very similar situation. Mashing in an un-modified cooler with a large bag. Terrible efficiency.

I'll be interested to hear what the cheapest & easiest ways are for us to increase efficiency.
__________________
"EC-1118 is a monster yeast. But it is also clean and quick. Like a humane serial killer."

1 Gal: Brandon O's-Graff
2 Gal: Big Ol' Barleywine
5 Gal: Graham's English Cider
5 Gal: Apfelwein
__________________________________________
Bottled: Traditional Wildflower Mead, Burnt Apple Braggot, Apfelwein, Big Ol' Braggot
Kegged: Wee Bit O' Honey

 
Reply With Quote
Old 06-21-2011, 04:09 PM   #3
brewmcq
HBT_LIFETIMESUPPORTER.png
 
brewmcq's Avatar
Recipes 
 
Apr 2011
Houlton, ME
Posts: 1,800
Liked 534 Times on 366 Posts


I'm in a somewhat similar situation.

Assuming my calculations are correct, my first BiaB (Mash in a Bag) topped out at just over 88%... and they have been spiraling downhill since then..
__________________
Brew McQ | Welcome to my Pub | Brew McQ on Facebook | Northern Maine Home Brewers on Facebook | Untappd

What do YOU want out of this hobby? It's your hobby. Do it the way YOU want to do it. Don't depend on the rest of us to tell you how to do it.

 
Reply With Quote
Old 06-21-2011, 05:11 PM   #4
redcoat_or_rebel
Recipes 
 
Jan 2011
Austin, Tx
Posts: 171
Liked 6 Times on 5 Posts


if you are holding temps, then check your crush. i just mash in the BK. if you can reduce headspace you can hold your temps for an hour or more. then make up the rest with your sparge water.

88% aint bad.

 
Reply With Quote
Old 06-21-2011, 06:04 PM   #5
brewmcq
HBT_LIFETIMESUPPORTER.png
 
brewmcq's Avatar
Recipes 
 
Apr 2011
Houlton, ME
Posts: 1,800
Liked 534 Times on 366 Posts


Yup... 88% is darn good, which is why I'm a bit put off that my last batched have been in the 60's...

Brewing again tomorrow... gonna REALLY take my time on them and hope for another improvement.
__________________
Brew McQ | Welcome to my Pub | Brew McQ on Facebook | Northern Maine Home Brewers on Facebook | Untappd

What do YOU want out of this hobby? It's your hobby. Do it the way YOU want to do it. Don't depend on the rest of us to tell you how to do it.

 
Reply With Quote
Old 06-21-2011, 06:09 PM   #6
dcp27
Recipes 
 
Jan 2010
Medford, MA
Posts: 4,125
Liked 125 Times on 121 Posts


I find when I double crush I get lots of dough balls. if you dont break them up you'll lose a good chunk of efficiency.

 
Reply With Quote
Old 06-21-2011, 06:34 PM   #7
terrapinj
 
terrapinj's Avatar
Recipes 
 
Dec 2010
Santa Monica, CA
Posts: 2,415
Liked 170 Times on 126 Posts


how are you sparging?

are you stirring enough when you dough in?

 
Reply With Quote
Old 06-21-2011, 07:11 PM   #8
cadarnell
Recipes 
 
Dec 2010
Bloomington In., Indiana
Posts: 538
Liked 36 Times on 12 Posts


i made my last mash too thick .. i know that cost me some points .. i have been doing much beter with thinner mashes ..

 
Reply With Quote
Old 06-21-2011, 07:29 PM   #9
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
 
Bobby_M's Avatar
Recipes 
 
Aug 2006
Whitehouse Station, NJ
Posts: 23,330
Liked 1765 Times on 1122 Posts


Quote:
Originally Posted by Fathand View Post
I am slowing making the move to all grain after several year of extract and partial mash brewing and I have been doing a modified version of Brew in a Bag. I don't have a mash tun built just yet so in the interim I am using an unmodified cooler to mash in and using two 5 gallon paint strainer bags. I did a Hef this past weekend and wished my gravity was a little higher.

Here's what I did...

5 lbs Wheat malt
4 lbs Pilsner malt
1 oz Hallertau (60 min)

Mash at 153 for an hour with 12 quarts of water.
Sparged with additional 12 quarts of water at 170 for 15 minutes
Boil = 60 min

OG I got was 1.040. At the very low end of the range.
I did double crush the grains because I read that it helps increase the efficiency of BIAB.

What can I do to increase my gravity?
It's been asked but I'll second it. How did you sparge?

The way I'd do it is heat that sparge water up in your boil kettle to about 185F, pull the bag out of the MLT (let it drip drain first), then dunk it into the boil kettle/stir and let it drip before discarding.
__________________
Welcome to BrewHardware.com. I love you.
New Stirplates are IN!
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.

 
Reply With Quote
Old 06-21-2011, 07:34 PM   #10
wyzazz
Recipes 
 
Aug 2009
Atwater, OH
Posts: 4,315
Liked 56 Times on 53 Posts


Thinner mash, stirring really well, crush, squeezing the bag, raising the temp for mash out...

All of the above will help with your BIAB mashes.
__________________
Quote:
Originally Posted by Revvy View Post
And I'd like to see my 1.080 beers ready from grain to glass in a week, and served to me by red-headed twin penthouse pets wearing garter belts and fishnet stockings, with Irish accents, calling me "master luv gun," but we can't always get what we want can we? :)

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
A nice Podcast on BIAB from one of the Pioneers of BIAB gunner65 All Grain & Partial Mash Brewing 0 02-26-2011 01:24 AM
Question - modified biab or convert my 5 gallon cooler? JonClayton All Grain & Partial Mash Brewing 10 01-28-2011 11:36 AM
Do I have highly modified malt? Bane All Grain & Partial Mash Brewing 5 06-04-2010 04:35 PM
Modified BIAB: hitting 85%+ efficiency jaginger All Grain & Partial Mash Brewing 26 02-28-2010 03:37 PM
Modified vs. Unmodified Malts ZacMac All Grain & Partial Mash Brewing 8 03-22-2008 12:19 AM


Forum Jump