seasterl wrote:BTW, someone mentioned that the group is directly attached to the boiler, but CCS denies this. It is not attached to the boiler according them CCS. Can anyone confirm for certain any machine that actually does this besides Cimbali?
From the previous page:
Beezer wrote:I'm guessing it's better at pulling shots than most other machines in its class because it has a built-in PID, it has a large commercial group, and the group is directly attached to a fairly large boiler... Silvia has a smaller boiler, and the boiler is not directly attached to the group head, so it's more prone to temperature fluctuations between the boiler and the group.
Actually the Rancilio Silvia grouphead is directly connected to the boiler as shown below:Diagram courtesy of Eric Svendson
There's lots of espresso machines that have the grouphead connected to the boiler. Most lever espresso machines, Bezzera BZ02 / Livia 90, Elektra Semiautomatica, Olympia Maximatic... to name only a few. That said, I learned long ago not to waste time attempting to predict performance based on a spec sheet or peeking at the interior.