You guys are fcukin' crackin me up.
To be fair... I
AM the dark side.
(Or, at least, that's what some FB quiz told me 15 or so years ago. *shrugs)
And I did learn espresso from some salty MFers slingin' shots from an open garage in an alley in SF. (That was Blue Bottle before they sold to Nestle.)
I push my machine. Not gonna lie. My shots are stout and have mouthfeel. I can't abide a watery pull.
At least 7 out of 10 or 4 out of 5 shots will time pretty accurately in a reasonable range from the first drop until I stop the flow. Strangely, it was the new Shower Screen that really threw everything out of whack. But the kicker is that the Puck is evenly wet now, which it was not before changing. No sign of channeling, no dry spots.
I was noticing inconsistencies prior to changing the Screen and Basket.
@pseudoid : My scale is true at 20g and 100g. I have calibration weights and use them.
If you need pics...
@dfuller : I would counter that if my machine were choking, truly, I would not be extracting anything... or less than 2g of nothing but oily residue. That my puck is thoroughly wet, that I get the classic single stream from the Filter, that my Creme is dark and spotted, and that I am
most of the time getting a consistent yield... to my mind, all points to another inconsistency in the system.
I do not rule out human error as a variable, which I have stated before and always accept as a possibility.
But the first shot is almost always short, even if I burn a grind just to make certain that (as you suggested) there may be stale grind in the Grind Chamber. Following shots tend to be more consistent, though sometimes I find a surprise.
Regardless, the Blank Pull at the beginning of a session does seem to help even things out for the actual shots. This is what leads me back to our last little exchange about the Solenoid as a possible culprit. (I have yet to do a flow check as discussed as I have been occupied with some other matters... While Coffee is vital, it is of secondary importance to paid work and professional reputation.
Too bad I can't get paid for being a Barista to Myself!
)
OK... Seriously.
My admission that I hadn't cared for the Sylvia properly in almost four years is the first thing I am fixing. I took care of the Grinder and that is solid: the new Burrs have improved things. My thoughts now are that it is not the pump, but perhaps the Solenoid; which still doesn't change the path I've set for myself. I will replace the pump and adjust the pressure down from the 12PSI it is currently registering. Lastly, I will also look at the Solenoid.
Once I know the machine is back in best condition possible, I will play with me as the variable.
I know I will have to adjust my grind once I adjust pressure... and if there is another issue with flow or whatever.
But four years was too long for never descaling, I am certain.