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Assistance with brewing ratios...
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superdudeo
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Joined: 13 Apr 2007
Posts: 10
Location: uk
Expertise: Just starting

Grinder: yes
Posted Wed Dec 18, 2013, 11:28am
Subject: Assistance with brewing ratios...
 

I have recently acquired a B2C machine (please don't judge me!) and I have just realised I have made a massive mistake with shot volumes. I assumed a double shot (60ml) would equal an output of 60ml into my cup! The nature of the B2C means that I have various buttons but they all just equal the amount of water volume I believe. I can manually adjust this myself.

The maximum grind volume I can set the machine to is 14g. I am trying to play with shot volumes to experiment on the best espresso possible.

If we assume I use the maximum of 14g, would I be aiming for a shot volume (in my cup) of between 20ml to 28ml for espresso? (14/20 and 14/28) for a ratio between 70 to 50 -  I believe this is a good starting point?

Many thanks Chris
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jonr
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Joined: 25 Jun 2013
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Posted Wed Dec 18, 2013, 11:33am
Subject: Re: Assistance with brewing ratios...
 

I would not think about shot volumes in the cup.  Think about either weight in the cup or volume in the machine (before it passes through the coffee and gets crema).  14 grams of coffee producing 28 grams of espresso is worth trying.
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,672
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
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Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Thu Dec 19, 2013, 7:52am
Subject: Re: Assistance with brewing ratios...
 

I am a FL Oz kind of person so I will relate in that measurement system.
A double is defined as 14g of coffee yielding 1.5 to 2 floz of espresso (with crema)
Different locations have different "standards" I prefer to use 18 g of grounds to give me 2 floz of espresso in the cup.
Volumetric machines can be set by the user for the desired ratio. I have mine set as above, you may set yours for whatever you wish.

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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boar_d_laze
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Joined: 21 Nov 2006
Posts: 1,085
Location: Monrovia, CA
Expertise: I live coffee

Espresso: La Cimbali M21 DT/1 Junior...
Grinder: Ceado E92; "Bunnzilla"
Vac Pot: Royal Coffee Maker
Drip: Chemex + Kone; Espro Press
Roaster: USRC Sample Roaster
Posted Thu Dec 19, 2013, 2:45pm
Subject: Re: Assistance with brewing ratios...
 

jonr Said:

I would not think about shot volumes in the cup.  Think about either weight in the cup or volume in the machine (before it passes through the coffee and gets crema).  14 grams of coffee producing 28 grams of espresso is worth trying.

Posted December 18, 2013 link

+1

As jon reminds me, "brew ratio" is a technical term with a defined meaning.  And as I remind him, that's:
Weight of dose / Weight of shot = Brew ratio (expressed as a percentage).  

Volume does not factor into it.  The reason is that volume varies accordingly to density (highly dependent on crema) and cannot be used for an accurate determination of brew ratio.  

If shot volume tells you what you want to know, that's fine.  I sure has hell don't weigh every dose or every shot, relying instead on the grinder timer, appearance of the stream, and -- yes -- volume in the cup, muddling through with fair consistency.  But on the third hand, I do check the brew ratio often enough to keep the process honest.  

BDL
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