Author Topic: Mash temperature differences  (Read 3720 times)

Offline bluedog

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Mash temperature differences
« on: February 14, 2010, 09:33:18 AM »
Hi all,
When I mash I have a floating thermometer in the pot. I will get different readings if I check different spots. My question is if I take a sample of the liquid and the temperature is correct (let's say 152 F) does it matter if the temperature in the grain bed flucuates? I am stirring the grain in the mash tun every 5 minutes or so.

Offline weazletoe

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Re: Mash temperature differences
« Reply #1 on: February 14, 2010, 10:24:38 AM »
  When you doe in, you need to do a really good stir, five mins or so. Then, what I do is use a digital thermometer, and stir with that. The temp varies by a bit, but as long as it is a close average, I'm happy with it.
A man works hard all week, so he doesn't have to wear pants all weekend.

Offline denny

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Re: Mash temperature differences
« Reply #2 on: February 14, 2010, 10:26:06 AM »
I'm with Weaze....stir at dough in until you get consistent temps.  Then close the cooler and don't stir anymore.  Whenever you open it to stir, you lose heat.
Life begins at 60.....1.060, that is!

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Offline weazletoe

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Re: Mash temperature differences
« Reply #3 on: February 14, 2010, 10:28:53 AM »
Technically, since I learned this method from you..

I'm with Denny.
A man works hard all week, so he doesn't have to wear pants all weekend.

Online euge

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Re: Mash temperature differences
« Reply #4 on: February 17, 2010, 12:26:04 AM »
Found out the hard way. Stir it till yer arm hurts and it doesn't hurt to leave the tun alone after that. A good spoon is good indeed. Stir it like crap again before you sparge.

And a good preheat is critical. Don't skimp.
The first principle is that you must not fool yourself, and you are the easiest person to fool. -Richard P. Feynman

Offline ndcube

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Re: Mash temperature differences
« Reply #5 on: February 17, 2010, 06:32:27 AM »
I'm with Weaze....stir at dough in until you get consistent temps.  Then close the cooler and don't stir anymore.  Whenever you open it to stir, you lose heat.

That's what I do to.  Sometimes I'll open up for a pH sample.

Offline dhacker

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Re: Mash temperature differences
« Reply #6 on: February 17, 2010, 06:52:44 AM »
OR . . .

Let the motors do the work and never open the lid!   :D


Just brew it...

Offline beerocd

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Re: Mash temperature differences
« Reply #7 on: February 17, 2010, 07:06:12 AM »
OK,  how about a thread about your crazy cooler? Can't exactly make out what's going on with the manifold either, but now I'm interested...
The moral majority, is neither.

Offline ndcube

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Re: Mash temperature differences
« Reply #8 on: February 17, 2010, 07:12:08 AM »
I'd like to see more too.  From the pic it almost looks like the lid can't close b/c the props will hit the sides.

Offline dhacker

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Re: Mash temperature differences
« Reply #9 on: February 17, 2010, 07:47:22 AM »
The lid will close as long as the bottom props are indexed in relation to the tun sides . . which can be done via the top shafts on the motor . . a quick spin and they will line up fine. 17 RPM stirs the mash the entire time before sparge . . spool 'em up during the sparge, stop and let it settle for a minute or so before lauter drain . . piece o' cake and no heat loss from opening the lid. The #8 copper wire spiraled onto the braid was originally done to add support, but I subsequently found it unnecessary

A few more pics of the system . . it has been updated some since I took these.













« Last Edit: February 17, 2010, 07:52:04 AM by dhacker »
Just brew it...

Offline denny

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Re: Mash temperature differences
« Reply #10 on: February 17, 2010, 09:13:30 AM »
Some people are such friggin' overachievers!   ;)  Very cool!
Life begins at 60.....1.060, that is!

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The best, sharpest, funniest, weirdest and most knowledgable minds in home brewing contribute on the AHA forum. - Alewyfe

Offline dean

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Re: Mash temperature differences
« Reply #11 on: February 17, 2010, 10:20:29 AM »
Damn thats Pretty!!   :)   Houston... we have ignition.   8)

Offline bluesman

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Re: Mash temperature differences
« Reply #12 on: February 17, 2010, 10:22:57 AM »
Absolutely a work of art!
Ron Price

Online euge

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Re: Mash temperature differences
« Reply #13 on: February 17, 2010, 10:28:17 AM »
OMG!

Beautiful. Fantastic craftmanship.

I must not be thinking enough about brewing.
The first principle is that you must not fool yourself, and you are the easiest person to fool. -Richard P. Feynman

Offline dhacker

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Re: Mash temperature differences
« Reply #14 on: February 17, 2010, 01:47:23 PM »
Hey, thanks guys for the kind words.

Sad thing is that I'm almost done with the second generation version of "Hack's Whacked Orville and Wilbur Whirly Masher" based on a new Coleman 70qt. Extreme.  ::)  :-[
Just brew it...