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Thread: Silvias magical coffee disappearing trick

  1. #1
    Senior Member robusto's Avatar
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    Silvias magical coffee disappearing trick

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Ive always assumed the Silvia filter baskets hold 7 and 14 grams respectively when slightly heaped and then banged on the bench to settle grounds to rim level. *But, curious at why 200 grams of coffee was lasting only 3 or 4 days instead of a week, I did the maths: 200 grams divided by number of shots. And the sums add up to about 22 grams for the double shot basket. Is that possible? Have I got an over-sized basket? * * ::) And have I been unknowingly overdozing on caffeine? Im anxious to know whether any other Silvia owners have the same experience.

  2. #2
    Senior Member fatboy_1999's Avatar
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    Re: Silvias magical coffee disappearing trick

    I dont know for sure, but I think I use between 16-20g of beans for each double.

    Ed might be able to confirm as he has some 1g scales, but I think he aims for 18g per basket.

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    Re: Silvias magical coffee disappearing trick

    How spooky, this morning I actually weighed out two silvia scoops worth of beans before grinding. Two scoops of Columbian was 14 grams. When ground it didnt quite fill the double basket. After a tap to settle and a tamp to set the puck it finished just below the bottom of the circlip groove in the basket. Interesting the pour rate was too fast, got more than 30mls in 30 seconds, so next time Ill put more in. ;D

    Side note to those who have watched Ed weave his magic. When he fills the PF, the ground looks even and fluffy, mine is close to that but there are some balls of ground coffee/ lumps. They arent oily and knock down easily enough when I tap the PF on the bench. Is it because he uses a doser and I dont or could it be Im grinding a bit finer?

    Boris

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    Senior Member robusto's Avatar
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    Re: Silvias magical coffee disappearing trick

    Boris, slight clumping should be ok, but if grounds forms firm balls Id say you are grinding too fine. I never use the plastic scoop as a measure. It certainly does not hold enough for one shot. Also, to add to the confusion, the double filter does not hold twice as much coffee as the single. Try this test using something easier than finely-ground coffee to dispense, such as sugar. Fill the single filter, and empty it into the double. The double wont take that much twice.

  5. #5
    ed_vinas
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    Re: Silvias magical coffee disappearing trick

    Quote Originally Posted by fatboy link=1114300989/0#1 date=1114305205
    I dont know for sure, but I think I use between 16-20g of beans for each double.

    Ed might be able to confirm as he has some 1g scales, but I think he aims for 18g per pasket.
    Yes, I generally weigh out about 18 - 19 grams for a double. I fill the portafilter and tap once then level and discard whats left. Depending on the bean, I will have minimal wastage.

    Cheers
    Ed

  6. #6
    Super Moderator Javaphile's Avatar
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    Re: Silvias magical coffee disappearing trick

    I had the same dissapearing coffee issue here and at the same time I wanted a more accurate measure of the amount of coffee being used for each pull for better consistancy and so started weighing out each pull.

    Much to my surprise I discovered that the minimum amount of coffee that I could use in my Cimbali Single basket was 9.7 grams. Any less than that and the puck would not expand enough to meet the screen with-out way over-tightening the portafilter resulting in uneven pulls and a very wet puck. The single baskets ideal amount appears to be 10 grams.

    On the double basket the minimum amount is 18.7 grams at which point the tamper bottoms out. The ideal amount in the double runs just over that at about 18.9 grams.

    These amounts vary slightly according to the coffee and the grind but are pretty darn consistant.

    Java "The Devil is in the details" phile

  7. #7
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    Re: Silvias magical coffee disappearing trick

    Robusto,

    re original question:

    22 grams...no, cant be done in regular sized filters.

    The answer to your question lies in you answering another question and that is...what type of filters are you using. If standard Silvia filters, they probably hold *around* 6 & 14 grams respectively when filled to proper level for your machine, with properly ground coffee (coarse ground coffee frinstance, doesnt pack up as much as fine ground, therefore you get less weight in the same volumetric measure, and vice versa), and tamped to a consistent tamping pressure.

    If you have at some stage bought the larger commercial sized single filter, you will be closer to 12 grams, and if you have the larger generic commercial sized double filter it will be in the vicinity of 18-19 grams (give or take, depending on type of coffee and amount of wear in the group seal & group ring).

    The filters that come standard on a new Silvia have "rancilio" stamped on the outside of the filters and are actually smaller than similar sized generic commercial filters. Why?...I bet nobody knows!

    If I remember on Tuesday, I might get the 1 gram scale out & compare the standard silvia filters with the generics of similiar but slightly larger size, with the large generic commercials.

    These are details, details, too many details...aaahhhhh!

    Regardz,
    FC.

  8. #8
    Senior Member robusto's Avatar
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    Re: Silvias magical coffee disappearing trick

    Thank you everyone for the great, illuminating responses. Just when you think you have this coffee thing sorted our, its back to square one. My baskets came stock standard with the Silvia, and have Rancilio stamped on the external surfaces. If they are 7/14 grams respectively...still doesnt explain where all that coffee is going.

  9. #9
    Senior Member fatboy_1999's Avatar
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    Re: Silvias magical coffee disappearing trick

    Robusto,
    My baskets are also the standard ones that came with the Silvia, but I am certain the double holds more than 14g. The way I grind anyway ;D

  10. #10
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    Re: Silvias magical coffee disappearing trick

    Robusto,
    * On top of all the previous advice, are you talking 200 grams of home unroasted coffee beans? I weighed out 200gms of beans, roasted them, weighed again, down to 168gm. *I would then use about 18 grams of beans per PF, as I grind a bit before actually filling the PF, to flush stale grinds out of the way. That works out to about 10 shots from a double basket. Three shots a day, two and a half days worth.

    Better get to the polls and oder some more.. ;D

    Boris

  11. #11
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    Re: Silvias magical coffee disappearing trick

    Hey there Robusto,

    ok yesterday afternoon I was setting up a new silvia/rocky combo for a client and remembered this thread.

    With volumetric dose set to just lightly "kiss" the underside of the shower, 15 kilo tamp & coffee ground to suit, for one of our medium roasted espresso blends, with the climactic conditions of the day in Canberra (your nations capital ;)), the standard Silvia filters on new equipment gave us 8 and 16 grams respectively as measured with the 1 gram increment electronic scales!

    How does that fit in with your experience?

    Regardz,
    FC.


  12. #12
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    Re: Silvias magical coffee disappearing trick

    Behmor Brazen - $249 - Free Freight
    Sorry but my eyes start to glaze over when I see people measuring in tenths of grams.

    Grind until the coffee just starts to clump, fill the basket until when tamped down it is just short of the shower screen, then hit the button.



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