Diastolic rest for lager yeast [Diacetyl Rest, not Diastolic]

[Simon David kelly]

Currently using lager yeast on a stout ... [insert jokes and "why?" here] ... holding the ferment at 13C nice and steady. Will I need to crank up the heat a little at the end to do a diastolic rest or is lager yeast fine without it? Using S-23.

 

Si

 

Edit: As Rev pointed out I actually meant Diacetyl !!!

[Reviled]

IMO it depends on what temp you pitched at, I usually pitch and ferment my lagers at around 10*c and have never had the need to do a diacetyl rest, but I think if you pitch warmer then you may have to...

I personally never do a D rest, even with ales ive never really got any diacetyl in my beers apart from when I used 1026 british cask yeast...

[Reviled]

Also, whats diastolic? ;o) lol

[Simon David kelly]

Diastolic is the blood presure mesurement, which I apparently can't get out of my bloody head.

I of course meant a Diacetyl Rest ....

[JackoNZ]

Simon, I reckon the best way is to just take a sample after about 5-7 days, you should be able to pick up the diacetyl, I'm crap at picking out aromas but even I could smell diacetyl on a couple of my early lagers with S-23. If it's there then bring the fermenter up by 3-4 degrees, I believe ideally it's sposed to be done about 3/4 of the way through but I've done them when fermentation has completed and it's still got rid of the diacetyl.

[Simon David kelly]

Thanks Lee, I'll take a reading tonight and see where it is. OG was 1.074, so I reckon it's at about 1.035(ish) by now. Target is 1.020.

[JackoNZ]

Sounds like a big beer mate!! What's the thinking behind using lager yeast in a stout? What's your recipe on this bad boy?

[Simon David kelly]

This is the recipe, it's for the Matariki Beer Festival, and I still don't quite know who I got asked to do a beer for it :o)

I hope it turns out ok. I used lager yeast as the temp in the house isn't getting above 13 at the moment and I feared yeast death if I'd gone with an ale strain. As it happens I got my temp control unit working and could have done a steady 18C.

[jt]

Yea the temperatures been pretty low, and consistently so over the last fortnight
I've got an ale with '05 sitting on the garage floor that has been pretty strong between 12 and 15.
I was considering getting some 34/70 off Liberty and doing a couple of Motueka lagers

[Simon David kelly]

I bought myself one of those temp guages with the high low arms to monitor the rooms a while back. The back room hit 7C when it was 9C outside, the house can be a fridge sometimes :o)