instead of evil...
h34r:
Or so it seems -- mwah hah ha ha haaaaa (check the blurb under my avatar)
There are two parts to the bittering in the cube argument.... there have been quite a few threads about it and a bit of a search will lead to many posts (a lot of them by me.. I have a bug up my bum about it - so I dont mind having another shot here
)
There is -
Add some actual hops into the cube.
I don't think anyone is arguing seriously that this won't add a chunk of bitterness. Any debate is around how much bitterness it adds - and whether the flavour/aroma it adds is worth the bother. I think we have the "boiling equivalent" reasonably bracketed... I reckon 20-25 mins for loose pellet hops... I think the lowest guestimate I have heard is about 10. So really, you are only a brew or three away from sorting it out for yourself by experimentation.
There is also
Will late additions continue to isomerise in te cube, adding bitterness?
Now this one is far from sorted.
I reckon yes. My reasoning is that the alpha acids dissolve in the hot wort fairly quickly (if you use pellets) and that those alpha acids go into the cube regardless of whether the hops themselves do. So with a flame out addition, a goodly chunk of the alpha acids will actually dissolve into the wort, go into the cube, partially isomerise and add bitterness.
This tends to support the "my No-chilled beers are often over bitter" question that is frequently asked -- but doesn't explain the people who don't notice an increase.
I have mucked about with my brewing results (no lab tests yet) pro-mash and a calculator... and I reckon that you are likely to get a bitterness contribution from
any hop addition in a no chilled beer, equal to 10-15 minutes extra boiling. So your 30minute hops.. are like 40min hops, you 60mins are like 70 and you flame out hops are like 10 minute hops. This sort of explains why it sometimes seems to happen, and sometimes doesn't.
Consider... an english bitter. Moderate hop additions of low alpha hops. Probably mostly all done in a 60 minute boil anyway.. so a little extra on the bittering addition is going to only add an ibu or two... and a flame out addition of say a 4% fuggles or something similar... only another IBU or two. Add really, our palates are struggling to pick up a bitterness diffference under 5 or so IBUs. So.... "what are you talking about, no-chill doesn't make a difference to bitterness".
Same thing on a 30IBU APA... ignoring the bittering addition, it might make a difference but we dont need it for this argument. Take a 20min 5min addition of simcoe at 13% - pro mash (rager) says that will add 12IBU... change that 5 min addition to a 15min addition (add 10 mins) and suddenly we are talking 19IBus, enough to notice, at the upper end of the scale assuming 15mins extra... it adds 24IBU or double the original. Imagine if you had a 30min flavour addition in there as well?
So - do late additions add bitterness?? Answer, maybe - depending on the beer, depending on the hops etc etc. I think if you assume all your additions will behave as though they were boiled for 10 mins longer than they actually were... you will be close to the mark.
BUT .... other good and knowledgeable brewers think I have it all wrong and the effect is much less, or not there at all. So at the end of the day you need to decide if you see a difference. If you do, hopefully all this typing will give you a framework for how you might start to work out how to compensate. If not, well, I'm all wrong and you can safely ignore me.
Hop additions are tricky... people have been shoving hops in beer for centuries. And even with normal additions they cant agree on how they will behave. Thats why there are three formula for bittering in promash... I dont know how many in Beersmith and the other brewing software. And none of them agree on how many IBUs a simple 60min addition will add. If we can even get close with the no-chill stuff. We are doing allright.
Besides... take no notice of me. I am evil remember :lol:
TB