Abyss Imperial Stout – The big brew! New years Day 2012, a beer to brew-bottle-and-leave until New years Eve (or as long as you can wait! 6 months +) Brewing today was the idea of @Leedsbrew and a number of us Homebrew Forum and Twitter users are having an Imperial Stout Brew-a-long, the results should be interesting if we get to taste each others fully matured beers in a years time.

Fermentables:
Lager Malt – 69%
Munich Malt I (Weyermann) – 7.2%
Sugar, Date Molasses – 4.9%
Cara Aroma (Weyermann) – 4.5%
Roasted Wheat (Simpsons / Barley Bottom) – 4.5%
Sugar, Molasses (Blackstrap) – 3.8%
Roasted Rye Malt – 2.7%
Chocolate Wheat Malt – 1.8%
Carafa Special III – 1.8%

Hops:
Target – 10.2 % @ 60 mins – 83g
Bobek – 5.2 % @ 60 mins – 37g
Centennial – 11.5 % @ 60 mins – 10g
Challenger – 7.6 % @ 30 mins – 35g
Pacific Gem – 14.6 % @ 0 mins – 21g (20-30mins steep)
Hersbrucker – 3.0 % @ 0 mins – 20g (20-30mins steep)
Fuggle – 4.9 % @ 0 mins – 19g (20-30mins steep)
Stella – 15.6% @ 0 mins – 19g (20-30mins steep)

Final Volume: 20 Litres
Original Gravity: 1.096
Final Gravity: 1.022
Alcohol Content: 9.9% ABV
Total Liquor: 33.5 Litres
Mash Liquor: 21.2 Litres
Mash Efficiency: 65 % (reduced from a regular 75-80%)
Bitterness: 154 EBU
Colour: 625 EBC

The Malts, 8.455kg of them:

The Sugars, Date Syrup & Blackstrap Molasses:

The day so far:
The mash was on last night at 00:50 and the temp was 66°c, at 9am this morning it had dropped to 59°c.
I did 1 sparge at 80°c with an hour’s Mash-out and collected my pre-boil volume in the copper, as I had expected this was lower than the predicted pre-boil gravity (10 points too low).
I did a second sparge at 80°c with a 30min Mash-out of 12 Litres while boiling the first run-off hard, ran off about half the mash then boiled down some more before running off the rest of the mash. I also added the sugars at this point, and continued boiling down until I reached 1086/7 when the bittering hops went in which will hopefully put me in the 1096 area for the end of the boil.

7 Degree drop over about 8 hours:

Pretty full mash tun with the sparge liquor added:

Today’s hops:

The Molasses going in:

Flameout steep hops, I threw in a 19g sample pack of Stella too (very nice smelling hop):

Dirty Copper, break material forming as the wort cools:

173g Safale US-05 yeast skimmed from previous brew and kept in the fridge for a week at 4°c, I’ll pitch the lot at 18°c:

OG: 1095 Temp corrected (Brix 23.8 with Refractometer = 1096):

Running to FV:
Pretty much hit my predicted OG, yeast pitched (still smelling of Nelson Sauvin hops from AG#70, if it wasn’t that I’ve just ruined an entire brew!) **Update, the beer in my Glass is Ta Moko, it smells just like the yeast, beer is fine)**
Copper is being very slow to run off, must be the thick sticky wort.
Its almost time for a beer, a Chilled very-early taster of Ta Moko just to see how its doing
I think I’ll be buying some more Basra Date Syrup as it tastes very good and would lend its self very well to a Belgian Ale.

Other peoples NYD Imperial Stout brewdays:  (I’ll add more as they are posted)
Spikesdad’s Imperial Stout
Barney’s Imperial Stout
Leedsbrew’s Titan Imperial Stout Parti-Gyle brewday
Lugsy’s Super Massive Black Hole Imperial Stout
Jimp2003′s Event Horizon RIS (Slightly Belated)
Tom Dobson’s Old Black Imperial Stout

*3rd Jan ’12 – Gravity is currently 1064-ish, Tastes good, some of the hopping coming through and some Fruity stuff which might be the Date Syrup.
*4th Jan ’12 – 1050
*Bottled 18th Jan ’12 – with 60g of White Sugar, filled 50-off 330ml bottles.