Happy HolidaySs Giveaway - Last Sponsor Giveaway of the Year!

Come Enter the BrewDeals/FastFerment Giveaway!


Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > HELP!!...mash temps
Reply
 
LinkBack Thread Tools
Old 06-28-2011, 08:50 PM   #1
Gropo
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2010
Location: Leavenworth WA
Posts: 139
Default HELP!!...mash temps

How the fark am I loosing 30 degrees to the tun?? According to promash, for my 8.5 lbs of grain my strike water should be around 168, which it was. After dough-in my grain bed was at about 135. I've added 2 quarts of boiling water and I'm at 138. Do I keep adding water?? This is a Scottish BTW

__________________
Gropo is offline
 
Reply With Quote Quick reply to this message
Old 06-28-2011, 08:55 PM   #2
cercueil
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2008
Location: New Jersey
Posts: 243
Liked 4 Times on 4 Posts
Likes Given: 7

Default

What the hell are you using for a mash tun? Liquid Nitrogen?

__________________
On Tap
Cerises Fonces (Dark Cherry Belgian Quad)

Up Next
Oaked IPA?
cercueil is offline
 
Reply With Quote Quick reply to this message
Old 06-28-2011, 08:58 PM   #3
Gropo
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2010
Location: Leavenworth WA
Posts: 139
Default

It's a hand-me-down 20 gallon plastic tun, which sits in an insulated plywood box. Maybe the dense foam insulation is pulling the heat out?? Anyway, should I keep adding water to try and rescue this, or consider it a lost cause?

__________________
Gropo is offline
 
Reply With Quote Quick reply to this message
Old 06-28-2011, 09:00 PM   #4
Golddiggie
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
Golddiggie's Avatar
Recipes 
 
Join Date: Dec 2010
Location: Between here and there, and everywhere
Posts: 12,058
Liked 480 Times on 421 Posts
Likes Given: 266

Default

Was the grain, and mash tun, in thr fridge/freezer and not have time to warm up? What's the temps where you are? What are you using for a mash tun (as already asked)?

I think you need to figure out why you got such a large temp drop. You could pull some of the wort/mash and heat it to get your temp. I would verify the thermometer readings first though. What are you using for a thermometer?

__________________
Hopping Tango Brewery

跟猴子比丟屎 ・ Gun HOE-tze bee DIO-se

On Tap: Caramel Ale, Mocha Porter II, MO SMaSH IPA
Waiting/Carbonating: 12.5% Wee Honey II, 8.9% Old Ale, English Brown Ale, Lickah ESB, Mocha Porter II
Fermenting
K1:
K2: Epic mead
K3: TripSix
On Deck: Caramel Ale
Aging:mead
Mead [bottled]:Oaked Wildflower Traditional, Mocha Madness, Blackberry Melomel, maple wine
Golddiggie is offline
 
Reply With Quote Quick reply to this message
Old 06-28-2011, 09:00 PM   #5
cercueil
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2008
Location: New Jersey
Posts: 243
Liked 4 Times on 4 Posts
Likes Given: 7

Default

I would try and get it till about 148 if you can. Mash for at least an hour or maybe more. The lower the mash temp the longer you have to mash for.

__________________
On Tap
Cerises Fonces (Dark Cherry Belgian Quad)

Up Next
Oaked IPA?
cercueil is offline
 
Reply With Quote Quick reply to this message
Old 06-28-2011, 09:00 PM   #6
cabal09
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2010
Location: FTCKY
Posts: 176
Default

Did you pre heat the mash tun?

__________________

Don't touch that please, your primitive intellect wouldn't understand alloys and compositions and things with... molecular structures.

cabal09 is offline
 
Reply With Quote Quick reply to this message
Old 06-28-2011, 09:02 PM   #7
cravej
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Philly
Posts: 224
Liked 5 Times on 5 Posts

Default

Is the thermometer accurate?

__________________
cravej is offline
 
Reply With Quote Quick reply to this message
Old 06-28-2011, 09:05 PM   #8
Gropo
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2010
Location: Leavenworth WA
Posts: 139
Default

I calibrated my digital thermometer before brewing. Grain and tun were at ambient temps...about 67 - 68. I'm stumped. Will I get any kind of conversion at all with mash temps this low???...I'm approaching 6 gallons of water in the mash right now. FUBAR

__________________
Gropo is offline
 
Reply With Quote Quick reply to this message
Old 06-28-2011, 09:20 PM   #9
BrewerinBR
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
BrewerinBR's Avatar
Recipes 
 
Join Date: Feb 2011
Location: Big Rapids, Michigan
Posts: 1,290
Liked 121 Times on 91 Posts
Likes Given: 42

Default

Do a Decoction ... Here is a calculation:
to determine the amount to extract:
((D-T) * (G * (0.3125+R) / (212-T))
Where
D = Desired Temperature of mash after decoction is added back in
T = Current temperature of mash
G = Total Grain in LB
R = Ratio of Quarts of water per pound of grain
212 is the Temp in F of the decoction.
0.3125 is the consistent approximate of the mashes capacity to absorb heat.
This will tell how much to extract from the Mash Tun.
You bring the extract to 150 to 153 F and rest 10 minutes. Then bring the extract to a boil and boil for 10 minutes. Then add it back to the total mash to bring you to the next rest.

__________________

I seek not a hobby to fill my time; I seek a passion to fill my life!

Basement Brew Room Build:
http://www.homebrewtalk.com/f51/base...-house-247971/

"Shame on the man of cultivated taste who permits refinement to develop into fastidiousness that unfits him for doing the rough work of a workaday world." -Theodore Roosevelt


Reason: more info
BrewerinBR is offline
 
Reply With Quote Quick reply to this message
Old 06-28-2011, 09:25 PM   #10
iaefebs
Registered User
HBT_SUPPORTER.png
Feedback Score: 2 reviews
Recipes 
 
Join Date: Aug 2010
Location: West Coast, MI
Posts: 2,663
Liked 242 Times on 176 Posts
Likes Given: 605

Default

After you save this batch...... next time...... pre heat the mash tun....

__________________
iaefebs 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
FG and mash temps... J311gonzo All Grain & Partial Mash Brewing 2 04-28-2011 07:03 PM
hitting mash temps by adding cereal mash martinworswick All Grain & Partial Mash Brewing 1 11-28-2009 07:00 PM
Mash Temps? Superdave All Grain & Partial Mash Brewing 4 03-14-2009 04:49 PM
Mash Temps? fixie All Grain & Partial Mash Brewing 11 02-28-2009 11:59 PM
Mash Temps robmee All Grain & Partial Mash Brewing 1 10-01-2005 09:42 PM



Newest Threads

LATEST SPONSOR DEALS