The Great Bottle Opener Giveaway

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Overshot mash temp - Bad JuJu?

Reply
 
LinkBack Thread Tools
Old 05-11-2009, 03:22 PM   #1
macabra11
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2009
Location: Boise, ID
Posts: 318
Default Overshot mash temp - Bad JuJu?

So I kind of had a bad feeling when I started making the starter for my IPA on Friday. Brewing Saturday was very spastic to say the least, and I am pretty sure there were gremlins in my equipment. My digital probe thermometer went wacky, and did not match up with my other two thermometers (actually all 3 were different, but the probe thermometer was WAY off).

I was shooting for a mash temp of 153º so I preheated the MLT, got the strike water up to 166º, added grains and the temp was about 149-150º. So I had some boiling water ready to go, and added a little (maybe 3-4 cups?), stirred and called it good. 90 minutes later when I took the lid off my MLT, the thermometer inside said 158º!!! So I overshot by 5º. I did a double batch sparge and collected my 7 gal of wort OK, but my efficiency was only 70% and my OG was under what was predicted.

What effect will a 158º, 90 min mash have on my beer? Is the high mash temp the probable cause for my low efficiency?

__________________

- macabra11
B - double E - double R - U - N

macabra11 is offline
 
Reply With Quote Quick reply to this message
Old 05-11-2009, 03:36 PM   #2
jkpq45
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2009
Posts: 278
Liked 1 Times on 1 Posts

Default

Sounds like a nice, thick IPA. May not be quite right for the style, but for me, it would be nice balancing all that alcohol and hoppyness with some mouthfeel.

In all reality, since you said you were having issues with your thermal guessing devices, your true mash temp will be different than what you measured. So no worries! It'll likely turn out fine, might even be a competition-winner in the style.

__________________
Solstice Brewing Co.
Fine Beers, Wines, Meads and Ciders
Since 2007
jkpq45 is offline
 
Reply With Quote Quick reply to this message
Old 05-11-2009, 03:39 PM   #3
Lil' Sparky
Cowboys EAC
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Lil' Sparky's Avatar
Recipes 
 
Join Date: Feb 2006
Location: Honolulu, HI
Posts: 4,013
Liked 47 Times on 32 Posts

Default

It's hard to tell since you didn't have a good handle on what your temps really were. Higher mash temps mean more alpha amylase activity, and at 158º you're starting to denature the beta enzymes, so you can get more unfermentable sugars and a sweeter/thicker/heavier beer in the end.

Next time, make sure you stir for much longer to let the temps stabilize. I bet your strike temp probably had you really close, and you just took a reading before the temps stabilized.

__________________
Quote:
Originally Posted by duffman2 View Post
I dub this beer the Double Slutty Triple Nutty Bodacious Booty Brunette!
Lil' Sparky is offline
 
Reply With Quote Quick reply to this message
Old 05-11-2009, 04:12 PM   #4
macabra11
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2009
Location: Boise, ID
Posts: 318
Default

Quote:
Originally Posted by Lil' Sparky View Post
I bet your strike temp probably had you really close, and you just took a reading before the temps stabilized.
I think you are right about that. The thermometer that I left in the MLT is VERY slow coming up to temp (but drops really fast), and I was in a hurry because I didn't want to let steam/heat out of my MLT. An extra min wouldn't have hurt if it meant I wasn't scorching my grains for an hour and a half.

The OG on this beer was SUPPOSED to be 1.073, but it actually hit 1.062. So now I am expecting this to be a 6% beer instead of a 7%.
__________________

- macabra11
B - double E - double R - U - N

macabra11 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
Keeping Mash temp during 90min Mash in 5gal Cooler MLT KYB All Grain & Partial Mash Brewing 13 01-30-2013 04:57 AM
Left Hand JuJu Ginger clemson55 Commercial Brew Discussion 3 04-11-2011 10:25 PM
Partial mash: mash temp too high - what to do? kcpup Beginners Beer Brewing Forum 6 10-18-2009 11:54 PM
bad JuJu InYerMouth All Grain & Partial Mash Brewing 6 03-03-2009 03:51 PM
Mash Temp Versus Mash Time mew General Techniques 8 07-16-2008 07:28 PM