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Old 10-06-2009, 07:06 PM   #1
Talloak
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So, I made a Sierra Nevada Pale Ale 'Clone' which will turn out to not be a clone, but just good beer. It went into the primary at about 1.074. I was planning on racking a Denny Conn Bourbon Vanilla Porter onto it (US-05). But that SNPA clone will probably end up at 7% abv, and the Porter will be 8%. Will the yeast be too stressed from alcohol to finish out the Porter. I don't want it to get stuck.
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Old 10-06-2009, 07:21 PM   #2
Gremlyn
 
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7% maybe a little high for straight reusing the cake. You could always wash the yeast and make a big starter.
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Old 10-06-2009, 07:46 PM   #3
mkling
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Why use stressed yeast if you don't have to. US-05 dry yeast is cheap -- go pick up another packet!
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Old 10-06-2009, 08:25 PM   #4
Talloak
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I certainly keep at least one spare each of US-05 and S-04 in my fridge. I'll just rehydrate and pitch a fresh pack of the beasties as usual. They have treated me well thus far and I trust them.
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Old 10-07-2009, 03:37 AM   #5
bkov
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1.074 shouldent of streesed us05 out. i would reuse the cake, itll be fine, plus you can never really overpitch

 
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Old 10-07-2009, 11:27 AM   #6
mkling
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Quote:
Originally Posted by bkov View Post
1.074 shouldent of streesed us05 out. i would reuse the cake, itll be fine, plus you can never really overpitch
Most published experts (e.g., John Palmer, Jamil, etc.) suggest this is wrong on both accounts. Different authors put the top gravity for reusing at different places, but most put the max at 1.050 to 1.060. Also, there are certainly flavor consequences to having some yeast reproduction which doesn't happen if you overpitch. There is good reason why the major brewers (craft & BMC) don't constantly repitch yeast from full batches onto new full batches.

Luckily, the consequences for both of these will not always change the flavor dramatically, but I personally suspect you'll be able to taste it.
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Old 10-07-2009, 09:24 PM   #7
bkov
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i know jamil said in the brewcast on yeast, that even though people say you can overpitch, you never really can homebrewing

 
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Old 10-07-2009, 09:33 PM   #8
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I'm sure that you CAN, but you'd probably have to intend on overpitching just to see if you could.

 
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Old 10-07-2009, 10:09 PM   #9
Scooby_Brew
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Quote:
Originally Posted by Talloak View Post
So, I made a Sierra Nevada Pale Ale 'Clone' which will turn out to not be a clone, but just good beer. It went into the primary at about 1.074. I was planning on racking a Denny Conn Bourbon Vanilla Porter onto it (US-05). But that SNPA clone will probably end up at 7% abv, and the Porter will be 8%. Will the yeast be too stressed from alcohol to finish out the Porter. I don't want it to get stuck.
The yeast will be fine, but at 8% ABV Porter, so with higher OG I would use 100% of the cake, as opposed to a lower gravity Pale Ale, where I would use about 1/3 or 1/2 of the cake.
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Old 10-07-2009, 10:24 PM   #10
KellyK
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Not getting into the use a yeast cake or not debate, the one thing I can say from personal experience, if you pitch a non-hoppy beer on to the yeast cake from a hoppy beer you WILL get hop transfer. We were misinformed regarding this and dropped a stout on top of a yeast cake from an IPA. Result was basically a black IPA. So, depending on how hoppy you want your Porter you may want to think about that.

 
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