I've got about a dozen all grain biab brews under my belt and have made some tasty beers along the way.
Although I'm not too fussed about precise measurements I have found the biabacus to be a great tool to help understand the process as well as keep a brewday on the straight and narrow. Thanks to everyone involved in producing such an amazing brewing tool.
I received the Greg Hughes book recently and thoroughly enjoyed it, especially the recipe part. Its here that the problems start... I have read a couple of threads on this forum and in particular the work of Rick in this post HTTP://www.biabrewer.info/viewtopic.php ... hes#p42371 who came to the magic formula of 22.2L in Section D original VAW.
Using that advice I set about scaling the Black IPA recipe. I can type the whole recipe if required but I don't want to get anyone in any trouble. My problem occurs with the bittering hop addition, it calls for Apollo (19.5%AA) 30g at the start of the 70 minute boil but only allocates 44.0 IBUs to this addition. My biabacus file calculates such an addition to produce 66.6 IBUs.
The 10 minute Citra (13.8%) addition of 30g indicates a 16 IBU contribution, this is replicated in my biabacus file almost exactly.
With such a strong first addition hop would you say the original recipe is wrong in trying to achieve an overall IBU of 60? When playing with the time of the first addition I would need to add it with around 24 minutes to go to produce the right IBU, is that the best way to use biabacus? I, of course, would like to mash and boil for 90 minutes.
Any help would be gratefully received.
Post #1 made 4 years ago
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Last edited by edzki on 12 Mar 2015, 22:57, edited 1 time in total.
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