Q re: Maxing out my mash Tun

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weisseguy
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Q re: Maxing out my mash Tun

Post by weisseguy » Tue Sep 11, 2018 8:43 am

So I’ve already used the Green Bay Rackers “Can I Mash it” calculator but I’m skeptical of the results so I wanted to double check with you guys.

What is the maximum amount of grain I can mash in an 11.7gal tun with 0.5gal dead space assuming 1.25 qt/lb mash thickness?

Also, what are the pros and cons of increasing the mash thickness? How thick is too thick?

As always, thanks in advance!


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mumblecrunch
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Re: Q re: Maxing out my mash Tun

Post by mumblecrunch » Tue Sep 11, 2018 12:54 pm

weisseguy wrote:
Tue Sep 11, 2018 8:43 am

Also, what are the pros and cons of increasing the mash thickness? How thick is too thick?
Lots of good info about mash thickness and its effect on efficiency here: Braukaiser

Generally I think you'll find that it suggests thinner mashes tend to yield better efficiency. The caveat is that a maximally thin mash (e.g., no-sparge) loses about 7-8% efficiency. Thinner mashes are also less likely to produce dough balls.

If you're looking to do a really big beer with a manageable mash thickness to try to maximize efficiency you might be better off doing two smaller mashes or even experimenting with re-iterated mashing (I think a few members here have tried this with decent results, I just can't remember who).

If you're less concerned about efficiency and you just want to do a big beer in a single mash (minimize time spent), I've never seen anyone claim the "Can I Mash It" calculator was wrong.

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weisseguy
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Re: Q re: Maxing out my mash Tun

Post by weisseguy » Tue Sep 11, 2018 1:31 pm

mumblecrunch wrote:
weisseguy wrote:
Tue Sep 11, 2018 8:43 am

Also, what are the pros and cons of increasing the mash thickness? How thick is too thick?
Lots of good info about mash thickness and its effect on efficiency here: Braukaiser

Generally I think you'll find that it suggests thinner mashes tend to yield better efficiency. The caveat is that a maximally thin mash (e.g., no-sparge) loses about 7-8% efficiency. Thinner mashes are also less likely to produce dough balls.

If you're looking to do a really big beer with a manageable mash thickness to try to maximize efficiency you might be better off doing two smaller mashes or even experimenting with re-iterated mashing (I think a few members here have tried this with decent results, I just can't remember who).

If you're less concerned about efficiency and you just want to do a big beer in a single mash (minimize time spent), I've never seen anyone claim the "Can I Mash It" calculator was wrong.
All of this is fantastic info! Thank you very much!


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Bottled: "Arrow's Oil" Oatmeal Stout, "Jess" Cascadian Black Session IPA, "Nimble Park" English Mild, "Complacence" Pale Ale
Fermenting: "Fire Burial" Mosaic SMaSH IPA, "Midnight Slider" Smoked Baltic Porter
Planning: Evil Twin Bikini Beer Clone

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McGruff
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Re: Q re: Maxing out my mash Tun

Post by McGruff » Wed Sep 12, 2018 7:30 am

I use Green Bay Rackers the odd time and found it pretty accurate.

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weisseguy
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Re: Q re: Maxing out my mash Tun

Post by weisseguy » Fri Sep 14, 2018 7:20 pm

So I brewed a beer attempting to take my run to the brim and according to the GBR calculator I was maxing it out but in reality I had about 3 inches of space left. I realized three things:

1. I’m over estimating my dead space
2. I literally left out some malt my accident
3. I was slightly undershooting the total volumes anyway just to be safe.

Learning all this will be really helpful when I attempt new high gravity batches!

The end result of this will be two stouts. A RIS (est. ABV 9.5%) made from the combined 1st & 2nd runnings and another weakling (est. ABV 4%) from the 3rd runnings!

Thanks again for the support!
Cheers!




Sent from my iPhone using Tapatalk
Bottled: "Arrow's Oil" Oatmeal Stout, "Jess" Cascadian Black Session IPA, "Nimble Park" English Mild, "Complacence" Pale Ale
Fermenting: "Fire Burial" Mosaic SMaSH IPA, "Midnight Slider" Smoked Baltic Porter
Planning: Evil Twin Bikini Beer Clone

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