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Old 07-22-2012, 07:47 PM   #1
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At first I was pleased but now this is becoming a problem. I'm consistently getting low 90s mash efficiency and mid 80s overall efficiency. When brewing AG kits hitting way too high OG and ending up with stronger brews than planned. My temps are good and batch sizes have been spot on. Do i have to intentionally alter something to get worse efficiency or what?


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Old 07-22-2012, 07:48 PM   #2
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Add more water?


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Old 07-22-2012, 07:54 PM   #4
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Originally Posted by Silverbullet View Post
At first I was pleased but now this is becoming a problem. I'm consistently getting low 90s mash efficiency and mid 80s overall efficiency. When brewing AG kits hitting way too high OG and ending up with stronger brews than planned. My temps are good and batch sizes have been spot on. Do i have to intentionally alter something to get worse efficiency or what?
Whatever the efficiency of your setup is, consistency is the goal. Once you know the efficiency of your setup, you adjust your recipes accordingly (reduce your grain bill) in order to hit your target gravities.

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Old 07-22-2012, 07:55 PM   #5
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I use the grain amounts that come in the kit and after the boil the amount is the same so more water won't help. I usually fly sparge and batch sparged the last one thinking it would lower efficiency. Should I alter my crush?
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Old 07-22-2012, 07:59 PM   #6
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Either of the above. If you are getting kits it might be easier to add more water than taking grain out. Play around with it a bit.

 
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Old 07-22-2012, 08:00 PM   #7
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I use the grain amounts that come in the kit and after the boil the amount is the same so more water won't help. I usually fly sparge and batch sparged the last one thinking it would lower efficiency. Should I alter my crush?
No, you don't need to alter your crush. Either scale up your volume (sparge volume mostly) so that you can hit your OG, or instead of buying kits just buy the ingredients you need from a recipe.

If you hit 85% efficiency each time, it's easier to just plan your recipe for 85% efficiency. My system is set up for 75% efficiency, so I can easily predict/plan my recipes and ingredients.
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Old 07-22-2012, 08:00 PM   #8
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Quote:
Originally Posted by Silverbullet View Post
I use the grain amounts that come in the kit and after the boil the amount is the same so more water won't help. I usually fly sparge and batch sparged the last one thinking it would lower efficiency. Should I alter my crush?
The principle limitation of kits is that they target a average efficiency range, which you don't have here. Adjusting your system to fit the kit, rather than the other way around, strikes me as a strange way to go, but if you want to do it, leave some of the sugar in the grain as you sparge. Don't change your crush, as that will just muck with your conversion in a way that's not reliable (if it does anything at all). The easiest approach would be to just sparge less (depending on your method) or dump some of your late runnings and replace the volume with water.
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Old 07-22-2012, 08:13 PM   #9
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I'm pretty consistent at this point so I think I'll just tailor my own recipe off whatever kit I'm eying. Thanks for the quick suggestions from the gurus!
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Old 07-23-2012, 03:26 AM   #10
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I was in the middle of a brew (Scotch Ale) when I initially posted and was shooting for 5.5g into the fermentor with an OG of 1.060. I was at 1.058 preboil. Post boil came in at 1.075 but I had enough head space to top up and watered it down to 1.065. Close enough. I missed the great suggestion of just sparging less and topping up from there if I have too. Much easier to implement with minimal changes and can adjust on the fly. Thanks again for all the suggestions everyone. This is an issue I never foresaw needing to account for....


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