Posted Fri Mar 15, 2013, 7:04am Subject: what is a chemex cup
i have chemex 8 cup, i can brew only 32 oz before it hits filter, takes about 3 to 4 min great cup of coffee, there biggest is 13 cup hand blown, will i get 52 oz with that, maybe i have a 6 cup and dont know it, will i have hard time keeping extraction time with 13 cup thanks gene
Posted Fri Mar 15, 2013, 7:18am Subject: Re: what is a chemex cup
i went to the chemex site and they had hights of 6 cup, i have six cup in 8 cup box, i remember i broke the 8 years ago, now if i go bigger will i have a hard time keeping extraction to the 3 to 4 min, how big can i go again thanks gene
Posted Fri Mar 15, 2013, 7:58am Subject: Re: what is a chemex cup
ok we got that settled. if i get the 13 cup, 65 oz hand blown will i be able to keep the brewing time to around 4 min? i use about 1.3 grams of coffee to 1 oz water. someone out there use a big chemex semper fi gene
Why? The grounds depth too much to get a decent percolation rate? Cause if not, I see this as a huge limitation for the big Chemex (which I don't own - I have a 10"cup").
------------------------------------------ ----------------------------------------- Le café doit être noir comme le diable, chaud comme l'enfer, pur comme un ange, et doux comme l'amour.
"There is no right answer with coffee. There is only the elixir in your cup at the moment you partake."
"...I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind;..." - Lord Kelvin RECIPES thread => http://www.coffeegeek.com/forums/coffee/machines/585708
jaybar Senior Member Joined: 13 Sep 2011 Posts: 111 Location: Brooklyn Expertise: Just starting
Posted Mon Mar 18, 2013, 11:20am Subject: Re: what is a chemex cup
There is simply no way 65 ounces of water will pass through the Chemex with enough ground coffee in 4 minutes. You would need a super coarse grind, like pebbles to make it through.
The more grinds you have and the mire water you pass through the more likely the draw down will be markedly slowed. The Chemex easily gets choked off. At high volumes. It should take about 7-11 minutes for a full 13 cup batch.
Posted Mon Mar 18, 2013, 7:10pm Subject: Re: what is a chemex cup
jaybar Said:
There is simply no way 65 ounces of water will pass through the Chemex with enough ground coffee in 4 minutes. You would need a super coarse grind, like pebbles to make it through.
The more grinds you have and the mire water you pass through the more likely the draw down will be markedly slowed. The Chemex easily gets choked off. At high volumes. It should take about 7-11 minutes for a full 13 cup batch.
7-11 minute contact time on anything less than coarse grind seems like it would overextract. I've made several overextracted brews in my Chemex because of fines clogging the filter or stalled percolation, and that's why I have to push a bit coarser.
On the flip side, I've set up perfect drip coffee with a Bunn that makes 70oz of coffee in 4 1/2 minutes. Takes 125g of brew coffee to do it, and that's pushing the limit of bed depth, but technically perfect.
------------------------------------------ ----------------------------------------- Le café doit être noir comme le diable, chaud comme l'enfer, pur comme un ange, et doux comme l'amour.
"There is no right answer with coffee. There is only the elixir in your cup at the moment you partake."
"...I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind;..." - Lord Kelvin RECIPES thread => http://www.coffeegeek.com/forums/coffee/machines/585708
IMAWriter Senior Member Joined: 4 Jul 2002 Posts: 5,475 Location: Brentwood, TN Expertise: I live coffee
Espresso: Nothing at the moment Grinder: Vario-W,Preciso-Esatto/KyM... Vac Pot: Adcraft SS, Yama 8 cup Drip: Brazen.Chemex, Hario, Clever... Roaster: Behmor 1600, CO/UFO combo
Posted Mon Mar 18, 2013, 8:16pm Subject: Re: what is a chemex cup
I KNOW you don't want to hear this, but there is no way the coffee will be hot enough for anyone to add 1/2 or milk without having to reheat their mug. Personally, I'd consider a large stainless vac pot like a Nicro (vintage) or Adcraft. Mine brews 50 oz piping hot. Or brew an 8 cup 40oz Chemex, decant into a Nissan, etc) thermal keeper, then do another smaller 4-5 cup Chemex.
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