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Brewing an imperial - epic boil times?

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user 31093

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Hi all!

I really want to do a rich full bodied imperial stout, I'm brewing all grain and am getting great results so far :icon_drool2:
As an imperial, I more or less want to double everything except volume eg 4.5% to 9%

I'm thinking I have 2 options...
1. True all grain - extra long boil to reduce volume, smaller batch as result. Will keep some 1.040 wort aside for the hops and boil separately. With this in mind, I'm thinking overboil the "main" batch then dilute when brewing if necessary.

2. A big partial - brew my usual all grain with extra "special" grains in anticipation of adding extracts to bring up gravity

My mash tun is 26L and my boil kettle is 40L so this will either end up as a 20something litre partial or a 10something litre all grain.

Option 2 is easy, option 1 is where I need assistance.
Other than the epic boil time and hop a dedicated hop wort, what else should I be mindful of?
 
Decided to go with the big fat partial option.

Recipe below - I stole it but added 1kg oats in place of 500g DME and added another 200g of roasted barley, because of roasted barley.

Putting in this order today, brewing Saturday :)


Recipe Specs
OG 1.106
FG 1.027

Batch Size 23L
Efficiency 70%


Fermentables
Maris Otter Malt 40.21% 3.900kg
LDME 25.77% 2.500kg
Flaked oats (toasted) 10.31% 1.000kg
Roasted Barley 8.25% 0.800kg
Caramalt 6.19% 0.600kg
Brown Malt 3.09% 0.300kg
Chocolate 3.09% 0.300kg
Crystal 120 3.09% 0.300kg

Hops
Pride of Ringwood 60.00 g @ 60 mins
Willamette 45.00 g @ 10 mins

Willamette 45.00 g @ 0 mins

Yeast
Safale S-04 75 %

Misc
[SIZE=11.818181991577148px]Whirfloc[/SIZE]
[SIZE=11.818181991577148px]No-Chill[/SIZE]
 
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