S34/70 attenuation... Experience?

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S34/70 attenuation... Experience?

Postby NickW » Thu Sep 21, 2017 12:52

Hi all

I'm due to brew a North German Pils tomorrow. 99% pilsner and 1% melanoidin. OG approx 1050. Will be fermenting at 12c with the usual diacetyl rest

I've been researching that s34/70 attenuates to 83% which will leave me with a beer approaching 1.006. This is too dry for me.. I think! Plus it seems to be 4 points below the lowest recommended FG for the style.

I was originally going to go for a 63c - 71c -76c mash step schedule. But the calculators seem to be suggesting that this will yield a very low FG which I don't want. If I just do a single infusion at 68c they seem to suggest it will give me closer to 1010.

I will be pitching 3 sachets rehydrated.

My question is.. Am I correct? What are your real world experiences with this yeast on a (nearly) all pilsner grain bill?

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Re: S34/70 attenuation... Experience?

Postby Brewzee » Sat Sep 23, 2017 18:09

My experience of 34/70 is that it does not floc well and floats off in little whisps if you just touch the bottles, not very appealing and I wonder if its so popular in industrial brewing because they filter/centrifuge all the yeast out so this isnt an issue for them.
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Re: S34/70 attenuation... Experience?

Postby NickW » Sat Sep 23, 2017 18:44

Well I did a 55/64/72/77 schedule. I'll be cold crashing and fining with gelatin and then kegging. So I'm not too worried about sediment

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Re: S34/70 attenuation... Experience?

Postby serum » Sun Sep 24, 2017 15:24

If you're using Beersmith I find it's all over the place with the FG when you start step mashing. I'd ignore it and just see what happens.

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Re: S34/70 attenuation... Experience?

Postby HTH1975 » Sun Sep 24, 2017 22:45

I use Brewers Friend- it's quick and easy to get you in the ballpark the first time. Yeast attenuation is always the 'average', so can be out by 2-4 points at times depending on mash temp and grist.

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2017: 105L brewed (need to update this figure)
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Conditioning: ciders from 2016, hedgerow barrolo, 1914 Courage RIS (10%).
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Re: S34/70 attenuation... Experience?

Postby NickW » Fri Sep 29, 2017 06:35

Thanks guys. Its approaching FG soon. I'll let you know the the finely gravity if anyone is interested.
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