Author Topic: Wlp802 went fast  (Read 3405 times)

Offline wort-h.o.g.

  • Brewer
  • ****
  • Posts: 356
  • Was möchten Sie trinken?
    • View Profile
    • Harvey's Brewhaus
Wlp802 went fast
« on: February 19, 2013, 08:03:36 PM »
So I pitched my 1gal starter of wlp802 ( .5 gal stepped to another .5 gal...estimated at 500 bill cells) into my pilsner at 1.051OG. I pitched decanted starter into 60f wort and It started fermenting after 6 hours, and now at about 81 hours of fermentation, it's at 1.020. I'm thinking tomorrow night I better do the d-rest, as at 1.019 I'm at about 80% complete since my final should be about 1.010.  My fermentation temp has been 51-52f.  This just seems really fast to me...but I've never used this yeast before.  Ay thoughts?

Offline BrewQwest

  • Cellarman
  • **
  • Posts: 79
    • View Profile
Re: Wlp802 went fast
« Reply #1 on: February 19, 2013, 10:00:40 PM »
First off....pitching your gallon starter is not really what you did...you made two of the one-half gallon starters which is not the same at all... did you use a stir plate? did you aerate with an aquarium pump? did you use oxygen? forgive me if I do not know your past posts, but many people coming to this forum would not know either unless you specified with more information......IMHO, your fermentation stage is only 61% completed from what you described so why would you want to do the D-rest this early? my math may be wrong and if so I apologize...cheers!!-
« Last Edit: February 19, 2013, 10:17:29 PM by BrewQwest »
On a never-ending journey for the perfect pint of beer...

Offline wort-h.o.g.

  • Brewer
  • ****
  • Posts: 356
  • Was möchten Sie trinken?
    • View Profile
    • Harvey's Brewhaus
Re: Wlp802 went fast
« Reply #2 on: February 20, 2013, 04:20:20 AM »
First off....pitching your gallon starter is not really what you did...you made two of the one-half gallon starters which is not the same at all... did you use a stir plate? did you aerate with an aquarium pump? did you use oxygen? forgive me if I do not know your past posts, but many people coming to this forum would not know either unless you specified with more information......IMHO, your fermentation stage is only 61% completed from what you described so why would you want to do the D-rest this early? my math may be wrong and if so I apologize...cheers!!-


right.... ;)   you can relax now.
« Last Edit: February 20, 2013, 04:28:59 AM by wort-h.o.g. »

Offline davidgzach

  • Senior Brewmaster
  • ******
  • Posts: 1498
    • View Profile
Re: Wlp802 went fast
« Reply #3 on: February 20, 2013, 05:30:13 AM »
Looking at Mr. Malty and Yeastcalc, you needed 375 Billion cells if that was a 5.25G batch.  If you pitched 500B, then that speed would not surprise me.  That being the case, take a taste and see whether you need a diacetyl rest at all.  You pitched plenty of yeast and sounds like they were quite healthy!

Dave
Dave Zach

Offline wort-h.o.g.

  • Brewer
  • ****
  • Posts: 356
  • Was möchten Sie trinken?
    • View Profile
    • Harvey's Brewhaus
Re: Wlp802 went fast
« Reply #4 on: February 20, 2013, 05:39:38 AM »
Looking at Mr. Malty and Yeastcalc, you needed 375 Billion cells if that was a 5.25G batch.  If you pitched 500B, then that speed would not surprise me.  That being the case, take a taste and see whether you need a diacetyl rest at all.  You pitched plenty of yeast and sounds like they were quite healthy!

Dave


dave- thanks for the constructive feedback. my fault for not saying, but i was 5.75 gallons in the carboy.  mr.malty and other calcs called for about 410bil, so you are correct stating i pitched a little high (by design).

i was just surprised how quickly its moved. im targeting around 1.016-.017 to do the d-rest...i just prefer to do it as matter of practice vs. skipping it and getting burned by the butter...so to speak. ;D

thanks again for the feedback.

Offline wort-h.o.g.

  • Brewer
  • ****
  • Posts: 356
  • Was möchten Sie trinken?
    • View Profile
    • Harvey's Brewhaus
Re: Wlp802 went fast
« Reply #5 on: February 20, 2013, 06:11:06 AM »
maybe my math for figuring % fermentation is off...if im looking for about 75% completion, whats the formula?

thanks

Offline hopfenundmalz

  • Official Poobah of No Life.
  • *
  • Posts: 4535
  • Milford, MI
    • View Profile
Re: Wlp802 went fast
« Reply #6 on: February 20, 2013, 06:58:36 AM »
Most of my lagers of that OG range are done in 5 or 6 days. I pitch at about 44 to 45 F, so a wrmer pitch means it will start faster, but may make more VDKs.

Time to do the D rest at 1.020 for a 1.050 beer Is about 1.020 so I agree.
Jeff Rankert
Ann Arbor Brewers Guild, AHA Member, BJCP Certified
Home-brewing, not just a hobby, it is a lifestyle!

Offline wort-h.o.g.

  • Brewer
  • ****
  • Posts: 356
  • Was möchten Sie trinken?
    • View Profile
    • Harvey's Brewhaus
Re: Wlp802 went fast
« Reply #7 on: February 20, 2013, 07:12:55 AM »
Most of my lagers of that OG range are done in 5 or 6 days. I pitch at about 44 to 45 F, so a wrmer pitch means it will start faster, but may make more VDKs.

Time to do the D rest at 1.020 for a 1.050 beer Is about 1.020 so I agree.

thanks for confirming the math... i guess i figured pitching at 60F was only slightly higher than my target ferm temp of 52F.  once i put it into lager chamber, it didn't take long to drop down to my set temp of 52F. hopefully this isn't a negative in the final product. i will have to experiment with lower pitching temps and compare.
« Last Edit: February 20, 2013, 07:16:44 AM by wort-h.o.g. »

Online denny

  • Administrator
  • I must live here
  • *****
  • Posts: 11661
  • Noti OR [1991.4, 287.6deg] AR
    • View Profile
    • Dennybrew
Re: Wlp802 went fast
« Reply #8 on: February 20, 2013, 10:22:29 AM »
i will have to experiment with lower pitching temps and compare.

Yeah, you should.  I found that my lagers turned out better when I started pitching a bit below fermentation temp and letting it rise to the temp intended.  Give it a try and compare the results to what you're doing now.
Life begins at 60.....1.060, that is!

www.dennybrew.com

The best, sharpest, funniest, weirdest and most knowledgable minds in home brewing contribute on the AHA forum. - Alewyfe

Offline blatz

  • Brewmaster General
  • *******
  • Posts: 2453
  • Paul Blatz - Jupiter, FL
    • View Profile
Re: Wlp802 went fast
« Reply #9 on: February 20, 2013, 11:29:26 AM »
i will have to experiment with lower pitching temps and compare.

Yeah, you should.  I found that my lagers turned out better when I started pitching a bit below fermentation temp and letting it rise to the temp intended.  Give it a try and compare the results to what you're doing now.

+1 - much, much better...
The happiest people don’t necessarily have the best of everything; they just make the best of everything they have.

BJCP National: F0281

Offline wort-h.o.g.

  • Brewer
  • ****
  • Posts: 356
  • Was möchten Sie trinken?
    • View Profile
    • Harvey's Brewhaus
Re: Wlp802 went fast
« Reply #10 on: February 20, 2013, 11:53:38 AM »
i will have to experiment with lower pitching temps and compare.

Yeah, you should.  I found that my lagers turned out better when I started pitching a bit below fermentation temp and letting it rise to the temp intended.  Give it a try and compare the results to what you're doing now.

+1 - much, much better...

i believe you guys..probably my mistake last time also denny where i had slight diacetyl in the last lager Denny.

right now its at 1.020, and i tasted a touch of diacetyl. should i pull it now for d-rest or wait for it to move a few more points? i know my target FG is 1.010, which would make 1.020 the appropriate d-rest...but what if the beer intends to finish lower at 1.008-9. i'd hate to pull it early at 1.020 if that were the case...what would you guys do?

Offline BrewQwest

  • Cellarman
  • **
  • Posts: 79
    • View Profile
Re: Wlp802 went fast
« Reply #11 on: February 20, 2013, 12:00:03 PM »
Quote from: BrewQwest
.....IMHO, your fermentation stage is only 61% completed from what you described so why would you want to do the D-rest this early? my math may be wrong and if so I apologize...cheers!!-
Man, I apologize... For some reason I computed your attenuation rate reached at point 1.020 which was (51-20)/51 = 60.7% instead of your completion percentage... And when plugging your starter size into yeastcalc it helps if I remember to put it in gallons instead of liters ...No wonder I had the cell count off by so much... doh!!!... Sorry again...
On a never-ending journey for the perfect pint of beer...

Offline wort-h.o.g.

  • Brewer
  • ****
  • Posts: 356
  • Was möchten Sie trinken?
    • View Profile
    • Harvey's Brewhaus
Re: Wlp802 went fast
« Reply #12 on: February 20, 2013, 12:01:24 PM »
Quote from: BrewQwest
.....IMHO, your fermentation stage is only 61% completed from what you described so why would you want to do the D-rest this early? my math may be wrong and if so I apologize...cheers!!-
Man, I apologize... For some reason I computed your attenuation rate reached at point 1.020 which was (51-20)/51 = 60.7% instead of your completion percentage... And when plugging your starter size into yeastcalc it helps if I remember to put it in gallons instead of liters ...No wonder I had the cell count off by so much... doh!!!... Sorry again...

no worries  ;D

Offline wort-h.o.g.

  • Brewer
  • ****
  • Posts: 356
  • Was möchten Sie trinken?
    • View Profile
    • Harvey's Brewhaus
Re: Wlp802 went fast
« Reply #13 on: February 20, 2013, 12:07:59 PM »
i will have to experiment with lower pitching temps and compare.

Yeah, you should.  I found that my lagers turned out better when I started pitching a bit below fermentation temp and letting it rise to the temp intended.  Give it a try and compare the results to what you're doing now.

+1 - much, much better...

i believe you guys..probably my mistake last time also denny where i had slight diacetyl in the last lager Denny.

right now its at 1.020, and i tasted a touch of diacetyl. should i pull it now for d-rest or wait for it to move a few more points? i know my target FG is 1.010, which would make 1.020 the appropriate d-rest...but what if the beer intends to finish lower at 1.008-9. i'd hate to pull it early at 1.020 if that were the case...what would you guys do?

just wondering if waiting another day or two fermenting at 50-51F is better than pulling it now for d-rest, just in case it does end up at under 1.010.....any suggestions would be greatly appreciated!!! thanks

Offline ynotbrusum

  • Senior Brewmaster
  • ******
  • Posts: 1004
  • Da mihi sis cerevisiam.
    • View Profile
Re: Wlp802 went fast
« Reply #14 on: February 20, 2013, 12:08:41 PM »
If you are going to a secondary, you can do the d-rest now, but I just leave mine in the primary for a month without D-rests.  The yeast finish the lager off without a problem.
Hodge Garage Brewing: "Brew with a glad heart!"