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Fighting a losing battle!
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Faceface
Senior Member


Joined: 28 Feb 2014
Posts: 1
Location: London
Expertise: Pro Barista

Posted Fri Feb 28, 2014, 5:33am
Subject: Fighting a losing battle!
 

So, here's the situation:

We've a delightful Faema E61 Jubile, that is currently working off less amp than usual - we've modded it a little to try deal with this. So what we have is the boiler at bout 1.4 bar, but with a drop of up to -0.4 to -0.5. This results in a pump pressure of 6.5-7 and a temperature of 80C'... Less than bloody ideal!

Now, we're correcting this soon as we can afford to - new, suitable machine etc.

But in the meantime, any suggestions to get the best coffee? My usual shot is around 19g, 75ml water, weighing in at 31-33g, aiming for a ratio of 1:1.6-1.7

Here are the negatives I'm noticing:

  1. Early blonding/short first stage
  2. Long extraction time, up to 60 secs (even if start looks good)
  3. Burnt/over extracted taste, combined with an unpleasant astringency I'd usually associate with under extraction.

Now, I'm definitely still learning when it comes to knowing what variables effect what most, and I know I'm fighting a losing battle against this machine.

But here's things I've noticed. A ratio of 1:1.1-2 tastes great, and comes is at 30 secs... But I can't recreate it! It seems to happen like magic, but then dissappear within a few hours. Definitely related to beam freshness I'm thinking.... But can I chase this goal? I'm not sure which variables are most likely to achieve this?

Would love to hear your thoughts!
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,670
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Fri Feb 28, 2014, 7:18am
Subject: Re: Fighting a losing battle!
 

I am having a little trouble understanding what is going on with the machine. It may just be me.?

You say it is operating at less CURRENT than normal ? What mods have you done to it?
You say the boiler is at 1.4 bar (high side of normal) then say you get a ~.5 bar drop.... when?
Boiler pressure has nothing to do with pump pressure, they are two different things and with a pressure of 1.4 you should have no problem keeping up temp in the normal range for your shots.

your items.

1 early blonding..... well some coffee changes color faster than others but that is not "blonding" Blonding is when the flow changes to a thin, watery, pale flow. This is quite different than the color change that happens early in the shot with some coffees.

2 Long extraction time. This is your grind. (though I am still not sure what is going on with the pump) grind more coarse.

3  Over extracted taste which is associated with UNDEREXTRACTION?

Espresso is all about LITTLE things, every thing matters, every change affects the shots. Consistency is key, without it, the shots run all over the map and you have no idea how  any one change affects the shots. Only ONE change at a time and make it small changes.

 
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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frcn
Senior Member
frcn
Joined: 23 Dec 2001
Posts: 3,350
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
Grinder: Mazzer Kony, Baratza...
Vac Pot: Hario, 2 Cory pots, 1 Cory...
Drip: Behmor Brazen, Bunn A10 mod...
Roaster: computer controlled Hottop,...
Posted Fri Feb 28, 2014, 1:18pm
Subject: Re: Fighting a losing battle!
 

My first two thoughts:
1 - Invite someone over who knows how to adjust and use this machine.
2 - take it to a shop to get it worked on.

The Faema E61 Jubile is a wonderful machine and should be making excellent espresso for you.

 
Visit My Website
www.EspressoMyEspresso.com
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alanfrew
Senior Member
alanfrew
Joined: 19 Dec 2001
Posts: 639
Location: Melbourne
Expertise: Professional

Posted Fri Feb 28, 2014, 2:27pm
Subject: Re: Fighting a losing battle!
 

Boiler pressure 1.4 bar = HOT! Group temp 80C = Cool. I'd suggest that removing the mushroom will reveal scale clogged gicleurs and pipes, scale on the autofill probe and an overfilled boiler.

Alan
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