The Great Bottle Opener Giveaway

Home Brew Forums > Home Brewing Beer > General Techniques > Should I stir my mash often

Reply
 
LinkBack Thread Tools
Old 01-14-2013, 08:52 AM   #1
Wheelspin
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2012
Location: Johannesburg, South Africa
Posts: 116
Liked 5 Times on 3 Posts
Likes Given: 7

Default Should I stir my mash often

I've just completed a HERMS system and have done 4 brews so far.

Problem is that I'm having some trouble getting decent efficiency and am wondering if stirring my mash often during 60 minute mashing reticulation would help with efficiency.

I currently only stir it once or twice.

__________________
Wheelspin is offline
 
Reply With Quote Quick reply to this message
Old 01-14-2013, 08:55 AM   #2
dbsmith
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Seattle, Wa
Posts: 410
Liked 27 Times on 19 Posts
Likes Given: 24

Default

You should be getting decent efficiency, considering many brewers don't even stir at all. I usually stir about every 10-15 minutes of the mash, but that is because I just can't leave well-enough alone. Your problem may be related to something else, like your grain crush.

__________________
dbsmith is offline
 
Reply With Quote Quick reply to this message
Old 01-14-2013, 09:09 AM   #3
Wheelspin
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2012
Location: Johannesburg, South Africa
Posts: 116
Liked 5 Times on 3 Posts
Likes Given: 7

Default

I don't seem to have any problems with stuck mashes so should I double crush my grains ?

Crush looks fine (in my limited experience) to me as it is with a single crush ???

Also, what effect does mashing temps have on efficiency ? I've been aiming for 155 F but sometimes it runs away with me and strays up to 158 F even 161 F for short periods.

__________________
Wheelspin is offline
 
Reply With Quote Quick reply to this message
Old 01-14-2013, 09:14 AM   #4
dbsmith
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Seattle, Wa
Posts: 410
Liked 27 Times on 19 Posts
Likes Given: 24

Default

Your temp sounds perfectly fine. Try double crushing your grains. How is your sparging? How accurate are your volume measurements?

__________________
dbsmith is offline
 
Reply With Quote Quick reply to this message
Old 01-14-2013, 09:32 AM   #5
Wheelspin
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2012
Location: Johannesburg, South Africa
Posts: 116
Liked 5 Times on 3 Posts
Likes Given: 7

Default

Thanks dbsmith, I'm going to try a double crush.

My volumes should be good but I'm going to double check the measures I put on my site glasses.

I've just entered my calculations on the the Brewers Friend (www.brewersfriend.com/brewhouse-efficiency) efficiency calculator which gave and efficiency of 72% which I suppose is not bad. Good in fact.

However, my OG was 1,048 but the wheat beer recipe I used listed an OG of 1,055 so I'm quite a bit short on what was expected. See below.


Recipe Type: All Grain
Yeast: US-06
Yeast Starter: No
Batch Size (Gallons): 19 L
Original Gravity: 1.055
Final Gravity: 1.008
IBU: 13.8
Boiling Time (Minutes): 90
Color: 3.7
Primary Fermentation (# of Days & Temp): 14 at 16.6 C
Tasting Notes: Taste: (41.0 apparently) Very nice simple Wheat beer. Perfect color but the alcohol i

226 gram Rice Hulls (0.0 SRM) Adjunct 5.00 %
2.5 kg Wheat Malt, Ger (2.0 SRM) Grain 55.00 %
1.8 kg Pale Malt (2 Row) US (2.0 SRM) Grain 40.00 %
33 gram Hallertauer [3.00 %] (90 min) Hops 13.8 IBU
1.00 tbsp PH 5.2 Stabilizer (Mash 90.0 min) Misc
1 Pkgs Safbrew WB-06 (Fermentis #WB-06) Yeast-Wheat

__________________
Wheelspin is offline
 
Reply With Quote Quick reply to this message
Old 01-14-2013, 09:46 AM   #6
dbsmith
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Seattle, Wa
Posts: 410
Liked 27 Times on 19 Posts
Likes Given: 24

Default

Well, listed recipes always base an OG off of some sort of base efficiency..a lot of times it is 75%. Others use 65-70%. It just depends on the source. 72% is not too shabby, so don't be too disappointed. Just try to improve your system one step at a time..such as how you sparge, how you measure, etc. After you learn your system, you can easily adjust your recipes accordingly. I'm sure that your beer is going to turn out just fine, so don't sweat it.

__________________
dbsmith is offline
 
Reply With Quote Quick reply to this message
Old 01-14-2013, 11:37 AM   #7
dcarter
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2006
Posts: 362
Liked 22 Times on 19 Posts
Likes Given: 10

Default

I just made the maiden batch in my new all electric HERMS system this weekend and didn't stir at all during the mash. I stirred when adding the grains to the water to break up any clumps but that was it. I hit 87.9% efficiency. Your temps look fine but you seem to be on the high end for dry beer but that should'nt affect conversion, just fermentability. I would look at your crush and maybe check your flows on the HERMS and kick them up a little to get more contact time. You can also mash for a little longer as well, which is very easy with a HERMS. Good luck and let us know how it turns out.

__________________
Primary:Sierra Nevada Pale Ale Clone

My trash heap fridge rescue and conversion to a first class fermentation chamber

If you don't like your job, you don't strike!.....You just go in everyday and do it really half a$$ed, THATS the American way! - Homer J Simpson
dcarter is offline
 
Reply With Quote Quick reply to this message
Old 01-14-2013, 11:44 AM   #8
Wheelspin
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2012
Location: Johannesburg, South Africa
Posts: 116
Liked 5 Times on 3 Posts
Likes Given: 7

Default

When you say "FLOWS ON THE HERMS" are you referring the speed of circulation ? I've deliberately kept the flows quite slow, not sure why. Maybe I thought it would spend more time in the grains doing it's leeching thing.

Any idea of how many liters (or quarts) per minute would be ideal HERMS recirculation rate ? On a 5 gal batch.

__________________
Wheelspin is offline
 
Reply With Quote Quick reply to this message
Old 01-14-2013, 11:58 AM   #9
redman67
HBT_SUPPORTER.png
Feedback Score: 11 reviews
 
redman67's Avatar
Recipes 
 
Join Date: Feb 2010
Location: Taunton, MA
Posts: 394
Liked 13 Times on 11 Posts
Likes Given: 7

Default

I flow wide open on recirculation, no need to restrict it

__________________

Because God hates it when you drink bad beer

redman67 is offline
 
Reply With Quote Quick reply to this message
Old 01-14-2013, 12:09 PM   #10
Wheelspin
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2012
Location: Johannesburg, South Africa
Posts: 116
Liked 5 Times on 3 Posts
Likes Given: 7

Default

OK thanks, makes perfect sense

__________________
Wheelspin 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
How often to stir mash? illinibrew04 All Grain & Partial Mash Brewing 55 12-30-2013 09:35 PM
To stir mash or not to stir? ImperialStout All Grain & Partial Mash Brewing 17 12-04-2011 09:17 PM
Decoction mash tun tips? To stir or not to stir? Hopheader General Techniques 4 02-24-2011 09:36 PM
Mash-in and stir? pretzelb All Grain & Partial Mash Brewing 3 10-30-2010 10:49 PM
To Stir or Not To Stir : Mash Technique Question mmb General Techniques 19 03-02-2009 05:48 PM