Spike Brewing 12.5 Conical Fermenter Giveaway!

Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > 1st all grain O.G. way high. Is my efficiency low?

Reply
 
LinkBack Thread Tools
Old 01-07-2011, 08:06 AM   #1
jetmac
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
jetmac's Avatar
Recipes 
 
Join Date: Aug 2010
Location: Mcdonough, Ga
Posts: 1,159
Liked 17 Times on 17 Posts
Likes Given: 11

Default 1st all grain O.G. way high. Is my efficiency low?

Brewed my first AG. An American Ale from the Brewsmith software. I expected O.G. to be around 1.047 but it was 1.062. after 6 days fermenting at 70-71F the F.G. is at 1.028

I mashed with 3 gal of water but it resulted in 1.5 gal of wort. Is that pretty normal? I expected 2 gal.

Is my efficeiency of my mash tun too low?
Why was my O.G. so high?

Recipe:
8 lbs Pale Malt 2 row
1 lb Crystal 40L
.25 lb Munich Malt
.75oz Centennial 8.4% 60min
1 oz Cascade 6% 10min
White Labs WLP060

2L starter

Mashed 3gal 158F 45 min
Batch sparge 5 gal
60min boil

__________________
jetmac is offline
 
Reply With Quote Quick reply to this message
Old 01-07-2011, 11:16 AM   #2
Justibone
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2010
Location: Indianapolis, IN
Posts: 2,030
Liked 21 Times on 20 Posts
Likes Given: 69

Default

Grain does absorb some of the water you add. I think the rule of thumb is about .125 gallons per pound of grain, so for you that's 9.25 * .125 = 1.15 gallons absorbed. Wheat absorbs more.

If you expected 47 points in 2 gallons, that's 94. 94/1.5 = 63. Sounds about right.

Add more water next time.

Justibone is offline
 
Reply With Quote Quick reply to this message
Old 01-07-2011, 11:31 AM   #3
dzlater
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2008
Location: New Jersey
Posts: 1,041
Liked 27 Times on 26 Posts
Likes Given: 112

Default

For you're mash efficiency you need to use the total pre boil volume and the preboil gravity.

__________________
dzlater is offline
 
Reply With Quote Quick reply to this message
Old 01-07-2011, 12:55 PM   #4
jetmac
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
jetmac's Avatar
Recipes 
 
Join Date: Aug 2010
Location: Mcdonough, Ga
Posts: 1,159
Liked 17 Times on 17 Posts
Likes Given: 11

Default

My fermentation temp did drop from 70/71 down to 66/67 during a cold snap on the 3rd nite of fermentation . Could that have made the yeasties go dormant and not finish?

__________________
jetmac is offline
 
Reply With Quote Quick reply to this message
Old 01-07-2011, 01:20 PM   #5
jbug440
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2010
Location: north carolina
Posts: 85
Liked 2 Times on 2 Posts

Default

I don't think its done fermenting. Let it go another week and check the gravity.

__________________
jbug440 is offline
 
Reply With Quote Quick reply to this message
Old 01-07-2011, 01:23 PM   #6
timOD
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Collegeville, PA
Posts: 28
Default

What was your final volume after sparge? If 5-5.5 gallons, then it sounds like your hydrometer is off by about 15 points.

__________________
timOD is offline
 
Reply With Quote Quick reply to this message
Old 01-07-2011, 01:23 PM   #7
Justibone
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2010
Location: Indianapolis, IN
Posts: 2,030
Liked 21 Times on 20 Posts
Likes Given: 69

Default

No, yeast are fine at that temperature. Your mash volume is more likely to be the issue than a downspike in temperature.

If you taste it, and it tastes sweet, then you have a stuck fermentation. If it doesn't taste sweet, then it's fine and will be ready to bottle soon. Just take another hydrometer reading, and if it's the same as the one above then the beer is done fermenting (it might still be cleaning up it's side products, though).

If you don't want the gravity that high, you have a few options. Get some enzyme from your LHBS (you can use Bean-O if you want to). Or add some champagne yeast in there and see what they can do. Basically, until you have taken another hydrometer reading and tasted the beer to see if it tastes sweet, then you don't have enough information to proceed.

If you want a low-risk "something" to do right now, try swirling the closed fermenter to get some more yeast in suspension. It might help. It won't hurt (unless you spill).

That's just my opinion.

Justibone is offline
 
Reply With Quote Quick reply to this message
Old 01-07-2011, 01:50 PM   #8
jetmac
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
jetmac's Avatar
Recipes 
 
Join Date: Aug 2010
Location: Mcdonough, Ga
Posts: 1,159
Liked 17 Times on 17 Posts
Likes Given: 11

Default

Quote:
Originally Posted by timOD View Post
What was your final volume after sparge? If 5-5.5 gallons, then it sounds like your hydrometer is off by about 15 points.
Being my first brew this is something I completely forgot to check.
__________________
jetmac is offline
 
Reply With Quote Quick reply to this message
Old 01-07-2011, 04:43 PM   #9
dzlater
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2008
Location: New Jersey
Posts: 1,041
Liked 27 Times on 26 Posts
Likes Given: 112

Default

You can work it backwards to figure you're preboil gravity, if you know preboil volume, post boil volume and post boil gravity.

__________________
dzlater is offline
 
Reply With Quote Quick reply to this message
Old 01-07-2011, 06:38 PM   #10
Docjowles
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2008
Location: Fort Collins, Colorado
Posts: 172
Liked 1 Times on 1 Posts

Default

He said he mashed at 158. That's at the upper end of mash temps and is gonna give him a higher FG, although probably not 1.028-high. Also unless my math is wrong (likely ) he mashed at 1.3 quarts/lb which is a totally reasonable volume.

edit for typos

__________________
Docjowles 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
Poor all grain efficiency - PH level??? trevorc13 Beginners Beer Brewing Forum 3 08-12-2010 12:18 PM
first all grain. does my efficiency sound right? nootay Beginners Beer Brewing Forum 9 05-17-2010 02:16 PM
Drop in efficiency - too much specialty grain? axp Beginners Beer Brewing Forum 12 11-23-2009 01:38 PM
What number efficiency when starting out all-grain BillTheSlink Beginners Beer Brewing Forum 5 08-28-2009 11:08 PM
Mash Tun efficiency and Grain %'s BradS Beginners Beer Brewing Forum 1 06-22-2009 11:15 AM