Mitch Steele's hopping guide explained?

[Adam]

I heard the 20 minute calculation for whirlpool hops from Tasty, not Jamil.

[hoodie]

They've both talked about it at one point or another, but I don't want to hurt anyone's feelings . I love them both.

[bbbilly]

Another approach you could use (this assumes you use metric (grams) in Beersmith), is to add the weight of the hops in grams as the percentage (only boil hops, not flameout/whirlpool) hops. Then click on the adjust bitterness button, and set the target IBU for the batch.

So in the Stone IPA, you have 26% chinook, 23% columbus (both @ 90min) and 51% of centennial (at flame out). If we assume the whirlpool hops are 20 minute hops, add 26g of chinook, 23g of columbus, both at 90min, 51g of Centennial @ 20 mins, click adj bitterness and Brad does the maths for you.

I've been staring at equations for ages and here is was sitting in front of me all the time.

Hope this helps.

BN Army for Life. Oz rocks.

Cheers,
Billy

[Ozwald]

Oz rocks.

Awww, shucks...

Sorry, this was all I got out of that post.

[bbbilly]

Anytime brother.

[cheddahbiscuits]

I was wondering how you'd break down Mitch Steele's hopping schedule for his recipes in his IPA book. For example, for one beer he writes "Total boil time is 90 minutes. Using only pellets, add 62.5% Columbus at the start of the boil, then add 37.5% Centennial during the whirlpool." How do you determine how much at what IBU? Thanks to anyone who can help. This is for a 105 IBU beer.

I brewed the ruination you speak of using that information. First thing first, i check out the IBUS which is 105. and i am going to assume thats all my 105 IBUs are from the 90 min addition so for my 5 gal batch i did 1.9oz at 90 mins targeting 105 ibu.
1.9oz is then 62.5% of the hop bill.
1.9/.625=3.04 <this is your total amount of your hopbill.
3.04-1.9= 1.14 oz at whirlpool

Brewing software will help you as well. Its a puzzle but for most recipes most pieces are there.

[BeaverBarber]

So in the Stone IPA, you have 26% chinook, 23% columbus (both @ 90min) and 51% of centennial (at flame out). If we assume the whirlpool hops are 20 minute hops, add 26g of chinook, 23g of columbus, both at 90min, 51g of Centennial @ 20 mins, click adj bitterness and Brad does the maths for you.

Genius. That book's hop percentage thing was confusing to me too, but now it seems very simple.