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Old 12-09-2012, 03:47 AM   #1
spacecowboy13
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Is this even possible?

Did my first ever all-grain batch today. Used a 10g circular cooler with a homemade bazooka tube. Had the grains crushed at the store and mashed in at about 152. Used 5.2 and a little gypsum for taste. Batch sparged at 168 for 15 minutes.

Estimated pre=boil gravity was 1.038. Actual was 1.041

Post-boil gravity was estimated at 1.044. Actually was 1.055.

Can this be right?
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Old 12-09-2012, 03:50 AM   #2
Denny
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Sure, why not? I average 83-85% with a single batch sparge and no special procedures. I've been as high as 93%.
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Old 12-09-2012, 03:57 AM   #3
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Quote:
Originally Posted by Denny View Post
Sure, why not? I average 83-85% with a single batch sparge and no special procedures. I've been as high as 93%.
Do you let the sparge water sit for 10 minutes or so or just mix it up and drain it right away?

 
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Old 12-09-2012, 04:12 AM   #4
MalFet
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It could be, but your math looks fishy.

If your estimated pre-boil was 1.038 and your actual was 1.041, you really only came in a smidge above your target rate, assuming you hit all your volumes right. Post your grain bill and your gravities with volumes, and I'm sure someone will check your numbers.
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Old 12-09-2012, 04:23 AM   #5
spacecowboy13
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This is the recipe:

Ingredients:
------------
Amt Name Type # %/IBU
5.00 gal Dublin, Ireland Water 1 -
10.00 g Gypsum (Calcium Sulfate) (Mash 60.0 mins Water Agent 2 -
6 lbs Pale Malt (2 Row) UK (2.5 SRM) Grain 3 64.9 %
2 lbs Barley, Flaked (1.7 SRM) Grain 4 21.6 %
1 lbs Roasted Barley (300.0 SRM) Grain 5 10.8 %
4.0 oz Black Barley (Stout) (500.0 SRM) Grain 6 2.7 %
1.75 oz Goldings, East Kent [5.80 %] - Boil 60.0 Hop 7 38.9 IBUs
0.25 tsp Irish Moss (Boil 10.0 mins) Fining 8 -
1.0 pkg Irish Ale (Wyeast Labs #1084) [125.05 ml Yeast 9 -


Mash Schedule: Single Infusion, Medium Body, Batch Sparge
Total Grain Weight: 9 lbs 4.0 oz
----------------------------
Name Description Step Temperat Step Time
Mash In Add 11.56 qt of water at 163.9 F 152.0 F 60 min

Sparge: Batch sparge with 1 steps (4.54gal) of 168.0 F water
Notes:
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Old 12-09-2012, 04:28 AM   #6
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the volume is the important part for the calc...If you had a higher evaporation rate than expected then the extra gravity is from concentration of sugars and not efficiency. It is certainly possible to get around 85% on a good setup, especially with a good crush. Nice.
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Old 12-09-2012, 05:53 AM   #7
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Hell of a lot better than I've achieved over 10+ batches. Enjoy it and see if it repeats!
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Old 12-09-2012, 05:13 PM   #8
Denny
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Quote:
Originally Posted by granpooba19 View Post
Do you let the sparge water sit for 10 minutes or so or just mix it up and drain it right away?
Mix it in, vorluaf, and run off immediately. I've experimented with letting it stand for periods from 10-30 min. and found it made no difference at all. I think that the reason so many people let it stand is because when I originally wrote my article about batch sparging that was what I recommended. After further experimentation I discovered it wasn't necessary, but by that time the advice was being repeated.
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Old 12-09-2012, 06:58 PM   #9
spacecowboy13
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Thank you to everyone for all of the help! I'm doing a double-brew weekend, so I'm going to try and do everything exactly the same and see if there's a big difference in efficiency. I'm mashing right now, so I'll post the results in a few hours.
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Old 12-09-2012, 10:17 PM   #10
spacecowboy13
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Well, as promised, I just finished brewing again. Efficiency this time was 87.3%. I guess it wasn't a fluke...
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