Help with Silvia etc
Hey all. Generally a bit frustrated. I have a Silvia, v3 I think, near antique LaPavoni grinder and a Behmor 1600 roaster. I have been fairly happily making my own coffee for about 5 years now but have recently started to get a bit unsatisfied. I think I'm doing an ok job with roasting. My grinder is quality, but old, and I often get quite a different result with just one adjustment. The Silvia I think may be my biggest issue. I don't have a PID and temp surf. I start my shot at 20-30 seconds after light off. I usually make just 2 coffees at a time. There can be a big difference in extraction from the first to the second shot. I use the same grind and try my hardest to use the same tamp pressure but the first shot can look good and take around 25-30 secs, but the second one can just drip and drip for ages and take up to 60 secs to get a reasonable amount. I wonder if there is an issue with pressure? Also, lately I have not been happy with the general depth of flavour. I am aware that water temp can have a major baring on this and that a PID can help a lot. I'm wondering whether it's worth upgrading my machine, but what to? I know I've blurted on a bit here, any advice appreciated. Steve.
It doesn't sound like a PID will sort out your issues. The difference is extraction time from shot to shot shouldn't happen. Is your dosing quantity very consistent? If your dose is varying by a few grams then even with the same tamp and grind you will get marked differences in extraction time effort. One way to check is to remove the spring from the portafilter and dose into the basket, weigh on digital scales and then place into the portafilter. I tried this a while back and found more variation than I would have expected so I spent time working on my technique to ensure consistency.
Otherwise, have you had you machine professionally serviced recently? Also, what is the state of the burrs on your grinder? Maybe it needs new burrs.
Is it possible your grinder is overheating? It would be unusual to do so after just one shot, but maybe it needs a clean or new burrs? It would account for your substantial change in shot quality between the first and second pours.
Hmm, couple of you now talking about my grinder. I did give it a really good clean (unscrewed burrs etc) just last week, but the variance in shots has been going on a while. I tend to think the issue may be my dosage, though I try to be really consistent. If I was in a capital city, I would just arrange a session with a tech, but regional QLD is less accommodating. Think I may spend some time grinding, measuring, expressing, comparing.
Originally Posted by fruity