first AGB...missed my target gravity - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > first AGB...missed my target gravity

Reply
 
Thread Tools
Old 12-19-2012, 11:31 PM   #1
hog2up
Recipes 
 
Nov 2012
Cleveland, Ohio
Posts: 54
Liked 1 Times on 1 Posts



did my first AGB today. hit my mash temp of 154F and held for 60 minutes at that temp.

fly sparged my 4.5 gallons at 170F...drawing 1/2 quart per minute. got a little over 7 gallons of wort from 9.08 gallons of mash and sparge. water.

supposed to hit 1.042-44 preboil SG.....hit 1.34. had to add some malt extract to bring it up to 1.044 before boil.

thinking my grain crush for the wheat wasnt fine enough...looking for thoughts as to why i missed so my preboil SG by so much.

dunkle weizen:

Ingredients
Amt Name Type # %/IBU
8.0 oz Rice Hulls (0.0 SRM) Adjunct 1 4.3 %
6 lbs Red Wheat Malt (2.4 SRM) Grain 2 52.2 %
2 lbs Caramunich Malt (60.0 SRM) Grain 3 17.4 %
1 lbs Barley, Raw (2.0 SRM) Grain 4 8.7 %
1 lbs Cara-Pils/Dextrine (1.5 SRM) Grain 5 8.7 %
1 lbs Wheat Malt, Dark (9.0 SRM) Grain 6 8.7 %
1.00 oz Tettnang [4.80 %] - Boil 30.0 min Hop 7 13.3 IBUs
1.0 pkg Hefeweizen Ale (White Labs #WLP300) [35.49 ml] Yeast 8 -

 
Reply With Quote
Old 12-20-2012, 03:34 PM   #2
winterc
Recipes 
 
Dec 2012
Cumberland, VA
Posts: 84
Liked 4 Times on 4 Posts


I don't see enough base barley malt in your recipe to provide enough enzymes to convert 7 lbs of wheat starch. Wheat doesn't come with it's own enzymes, I'm not certain raw barley has enzymes for the conversion, either. I thought that was the reason it's malted. That being said, my first wheat beer wasn't as efficient as I had wanted it to be either, it was 4 points low. I tightened up my grinder and my second attempt was a bit better. I started simple with my wheat recipe:

5 lbs Pale Ale Malt
5 lbs White Wheat Malt
8oz Rice Hulls
1 oz Saaz for 60
Wyeast 3068

1st attempt:
Projected OG 1.052 actual 1.048
Projected FG 1.013 actual 1.010

2nd attempt:
Projected OG 1.052 actual 1.052
Still fermenting

 
Reply With Quote
Old 12-21-2012, 02:03 AM   #3
helibrewer
HBT_SUPPORTER.png
 
helibrewer's Avatar
Recipes 
 
Nov 2011
Santa Rosa, CA
Posts: 3,808
Liked 324 Times on 274 Posts


What was your mash ratio (water per pound)? You should be able to get within 95% of these numbers:


In other words a mash thickness of 1.53qts/lb theorectically could give you a first wort of 1.080...so you should be able to get about 1.076 as a gravity coming out of your MLT (before any sparging).

If you're not then your problem is in the MLT (conversion) process and not in lautering.
__________________
Something is always fermenting....
"It's Bahl Hornin'"

Primary:
Kegged: Bourbon Barrel Imperial Stout
On Deck: German Lager

wubears71 Likes This 
Reply With Quote
Old 12-21-2012, 02:24 AM   #4
wubears71
HBT_LIFETIMESUPPORTER.png
 
wubears71's Avatar
Recipes 
 
Dec 2011
Webster Groves, MO
Posts: 372
Liked 30 Times on 18 Posts


Quote:
Originally Posted by helibrewer View Post
What was your mash ratio (water per pound)? You should be able to get within 95% of these numbers:


In other words a mash thickness of 1.53qts/lb theorectically could give you a first wort of 1.080...so you should be able to get about 1.076 as a gravity coming out of your MLT (before any sparging).

If you're not then your problem is in the MLT (conversion) process and not in lautering.
I learned something new today. Thanks.

 
Reply With Quote
Old 12-21-2012, 02:40 AM   #5
chickypad
lupulin shift victim
HBT_SUPPORTER.png
 
chickypad's Avatar
Recipes 
 
Jul 2010
SF Peninsula
Posts: 5,078
Liked 905 Times on 734 Posts


Quote:
Originally Posted by winterc View Post
I don't see enough base barley malt in your recipe to provide enough enzymes to convert 7 lbs of wheat starch. Wheat doesn't come with it's own enzymes
That's actually not true, wheat malt has about equivalent diastatic power to barley malt. Unmalted wheat is a different story.

 
Reply With Quote
Old 12-21-2012, 02:44 AM   #6
Qhrumphf
Stay Rude, Stay Rebel, Stay SHARP
HBT_LIFETIMESUPPORTER.png
 
Qhrumphf's Avatar
Recipes 
 
Apr 2011
Arlington (DC), VA
Posts: 13,504
Liked 3475 Times on 2479 Posts


Quote:
Originally Posted by chickypad View Post
That's actually not true, wheat malt has about equivalent diastatic power to barley malt. Unmalted wheat is a different story.
+1

I've seen different sources conflict, but most agree that wheat malt's diastatic power exceeds 2-row, some its greater than pils malt, and some saying it's greater than 6-row. So it most certainly can convert that grain bill.
__________________
Souring: '14 Brett C Old Ale, '15 Lambic, '14 Lambic, '14 Flemish Red, '15 Flemish Pale, '15 Oud Bruin, '15 Session Kriek
Cellar: '10 Brett B Tripel, '11 Lambic, '13 Brett C English Barleywine, '13 Quadrupel, '13 Sour Stout, '14 Brett C Bitter, '14 Spontaneously Fermented Cider, '15 Wee Heavy, '15 100% Brett B Red, '15 100% Brett L Kriek, '15 Bière de Garde

 
Reply With Quote
Old 12-21-2012, 02:51 AM   #7
helibrewer
HBT_SUPPORTER.png
 
helibrewer's Avatar
Recipes 
 
Nov 2011
Santa Rosa, CA
Posts: 3,808
Liked 324 Times on 274 Posts


Quote:
Originally Posted by wubears71 View Post
I learned something new today. Thanks.
Braukaiser has a TON of great information on his site...all credit to him
__________________
Something is always fermenting....
"It's Bahl Hornin'"

Primary:
Kegged: Bourbon Barrel Imperial Stout
On Deck: German Lager

 
Reply With Quote
Old 12-21-2012, 12:45 PM   #8
hog2up
Recipes 
 
Nov 2012
Cleveland, Ohio
Posts: 54
Liked 1 Times on 1 Posts


Quote:
Originally Posted by helibrewer
What was your mash ratio (water per pound)? You should be able to get within 95% of these numbers:

In other words a mash thickness of 1.53qts/lb theorectically could give you a first wort of 1.080...so you should be able to get about 1.076 as a gravity coming out of your MLT (before any sparging).

If you're not then your problem is in the MLT (conversion) process and not in lautering.
I mashed at 1.25 qt water per pound. I really think it was my grain grind....my red wheat should have been ground finer than it was. It's a much harder grain than other wheat, and it simply didn't crush enough I think.

I've built a new recipe that I'm going to use different wheat ground finer, and more ferment able base malts vs. nonfermentables:

See recipe in photo.
Click image for larger version

Name:	image-724330745.jpg
Views:	127
Size:	66.7 KB
ID:	89573  

 
Reply With Quote
Old 12-21-2012, 04:12 PM   #9
RM-MN
HBT_SUPPORTER.png
Recipes 
 
Nov 2010
Solway, MN
Posts: 9,791
Liked 1773 Times on 1407 Posts


Wheat is a smaller kernel than barley and is harder too so it really is hard to get the proper crush and a poor crush will give you poor extraction of sugars. Some people have had success by wetting the wheat slightly to soften the kernels so they crush easier and other have closed the gap in the crusher to accommodate the small kernel.

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Missed target gravity by quite a bit, what happened? ninjai All Grain & Partial Mash Brewing 5 11-26-2011 04:41 PM
Odd beer missed target gravity -- prime or not? 61061 Bottling/Kegging 1 12-10-2010 07:05 PM
2nd AG batch - Missed target gravity ??? BeerNewbie All Grain & Partial Mash Brewing 7 12-11-2009 03:44 PM
Missed my gravity target? nicadrick Beginners Beer Brewing Forum 7 11-03-2009 09:17 PM


Forum Jump