Plinian Legacy Extract - Full Boil

[HeritageHD]

I would like to do a full boil on this kit instead of the suggested 2.5 gallons. I contacted NB to see if the had an adjustment to the hop schedule for this process and this is the response I received:

"The hop additions shouldn't change at all since the recipe was originally created under the conditions of a full boil. Just start the batch with 6-6.5 gallons of water and that should be all that you need to change."

This doesn't seem right to me due to the rules of hop utilization and boil volumes. Why would they give a hop schedule produced for a full boil and instruct brewers to use 2.5 gallons? Any ideas? I emailed NB back and am waiting for a response but thought I'd get some input here also.

Here is the recipe:
http://www.northernbrewer.com/documentation/beerkits/PlinianLegacy.pdf

 

[BeerFst]

I agree with you, they shouldn't be the same

That said, looking at the all grain recipe, the hop schedule appears to be the same, and one would assume that this would have to be done as full boil

It seems that they are ignoring the lost utilization due to the small boil for the extract version, likely for cost reasons.

I haven't brewed either, so take this with a grain of salt, but if you did a full boil with the same schedule and weights (as NB recommended) you'd end up with a beer the same as the all grain version. for reference the AG is below

http://www.northernbrewer.com/documentation/allgrain/AG-PlinianLegacy.pdf

 

[HeritageHD]

BeerFst - I didn't think to look at the all grain recipe, thanks for the info.

Here is the reply from NB:

"The variation of IBUs is really due to the gravity of the wort during the boil, this is why the 6 lbs of pilsen is added at the end of the boil. The late addition of malt allows for the alpha acids to dissolve before the gravity becomes too dense to kill the IBU levels. Overall between the full boil and partial boil the method used will change the IBUs by a minimal amount."

Thinking about the this and the late malt addition makes sense.

 

[user 141939]

Yeah that's a good point. It's nice to see instructions written with the late extract addition. Takes the work out if having to figure it out on your own.