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Sivlia still pouring too fast on finest grind?
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Coffeenoobie
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Posted Sun Apr 21, 2013, 9:02am
Subject: Re: Sivlia still pouring too fast on finest grind?
 

I could not tamp properly at first because my tamper would get stuck on the ridges till I got rid of my stock NS baskets.  I think it is possible.

 
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emradguy
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Posted Sun Apr 21, 2013, 5:04pm
Subject: Re: Sivlia still pouring too fast on finest grind?
 

Hmmm maybe VST should stop offering ridged baskets?

 
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takeshi
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Posted Mon Apr 22, 2013, 8:53am
Subject: Re: Sivlia still pouring too fast on finest grind?
 

Dayglow Said:

I did notice that with the stock double basket, even if the puck is tamped to just below the ridge it still touches the grouphead screw. Could the screw really disturb it enough to cause this problem that has not caused failure with so many other peoples' machines out there?

Posted April 20, 2013 link

Yes, it can.  I'd suggest finding a ridgeless basket so you can tamp lower (and dose less if you need to) since you indicate that the ridge is limiting you.  Are you using a naked portafilter to check for channeling?  It might help to know exactly where then channeling is taking place.  Are you using any workarounds to deal with distribution?
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Dayglow
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Posted Mon Apr 22, 2013, 4:46pm
Subject: Re: Sivlia still pouring too fast on finest grind?
 

takeshi Said:

Yes, it can.  I'd suggest finding a ridgeless basket so you can tamp lower (and dose less if you need to) since you indicate that the ridge is limiting you.  Are you using a naked portafilter to check for channeling?  It might help to know exactly where then channeling is taking place.  Are you using any workarounds to deal with distribution?

Posted April 22, 2013 link

I just recently picked up a stainless screw and filed down the cap so that it was lower profile. I still have to underdose by about 0.5g if I don't want it to touch at which point I feel my tamp getting limited by the basket edges. If I run a 15g I get minimal screw contact and the shot has move up to 15-20 second range with all other parameters being relatively the same. I am surprised that this could be such a limiting factor given that so many have had problems where others have none. At some point soon when I get back into the workshop I may have to countersink grouphead to get a more flush face.

My distribution is a variant on the chop with some light "fluffing" with a pick to break up the clumps and promote evenness. I wish I had a naked pf so I could check for channeling, but alas have not yet gotten there.

If I had some local people who could help diagnose it'd be well appreciated but I am kind of out in the hinterland compared to the bulk of espresso aficionados it seems.
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Dayglow
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Posted Wed Apr 24, 2013, 9:14am
Subject: Re: Sivlia still pouring too fast on finest grind?
 

I flush mounted the grouphead screw and it made a fair difference. The clearance is now perfect and I can only see it being better switching to a straight sided basket and being able to tamp lower. Thanks for the brainstorming!
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MJJ
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Espresso: Rancilio Silvia PID
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Posted Fri Apr 26, 2013, 7:00am
Subject: Re: Sivlia still pouring too fast on finest grind?
 

Hi,
  I have a Silvia V3 too. The first thought that comes to mind is your grind isn't fine enough, that's the most likely culprit. If the Silvia is new to you then maybe your grinder was fine for your old machine but not the Silvia. The Silvia needs a very fine grind like any other espresso machine with a non-pressurized portafilter.
  The next thing I would do is get yourself an 18 gram basket. For example a VST 18 gram, or Espresso Parts or other brand that fits in the Silvia. The stock double on the Silvia is a 14 gram basket. Taking your finest grind that you have now and making an 18 gram shot will already slow down the speed of your shot (but you might still need to grind finer to get 2 ounces in 25-30 seconds). For me getting the VST 18 gram basket made a big improvement in my shots right off the bat.
  My experience with the Silvia says don't over dose your basket too much. If you have the stock double then keep it at 14 or 15 grams. If you get an 18 gram basket you can put 17-19 grams in it. If you get a 20 gram basket then put 19-21 grams in it. If you overdose it too much then you'll get worse shots and water dribbling out around the edges of the basket...been there.
  I've asked a lot of questions about the grouphead screw. If you dose as above then you'll be fine with the stock screw. Read this new review about the Silvia on Home Barista, I'm "Mount Royal" and I asked about the screw and brew head pressure and got clear answers from the professionals who did the review.
  I wouldn't get caught up worrying about ridgeless baskets,etc., you can get along just fine with a ridged one, I think you're barking up the wrong tree there.

http://www.home-barista.com/rancilio-silvia-review.html
 
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zedex
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Posted Fri Apr 26, 2013, 11:13am
Subject: Re: Sivlia still pouring too fast on finest grind?
 

I had a v3 silvia for years. Never a problem.. Like i said. If you cant choke the silvia, its the grinder not grinding fine enough. The silvia is a very picky machine. Grind has to be bang on. Never touched my screw. The screw gave me an indication that my dose was right on. Had no channeling issues with the screw as is.

I used the Vario with great success and still using it.
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Dayglow
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Posted Fri Apr 26, 2013, 1:19pm
Subject: Re: Sivlia still pouring too fast on finest grind?
 

Everything got sorted out after I replaced the grouphead screw and I also spent some more time breaking in the burrs. I guess after 80+lb it still had some more to go... the grinder could go powder fine before but it struggled despite its sizable motor, now it chews through anything.
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