Re: Surprising Extraction Experiments....
The Best shot time will vary with the hardware used as well. What works on one machine wont neccesarily work with another.
On my Cimbali M-28 25 seconds is in fact the ideal time. Less than 23 seconds or more than 27 and eeeewwwwww.
Im currently playing around with my Cimbali M-52 to see if it can produce as good a shot as the M-28. If it can then I will be making it my main system over the summer as it puts less heat into the room than the M-28. So far Im not convinced that it can produce as good a shot as in head to head taste tests the M-52s shots are sadly lacking when compaired to the ones being produced by the M-28.
In order to make the comparision fair I am manually grinding the coffee for the shots in the M-52 and using the same exact amount (19.5g for this coffee) as is used in the M-28s pulls. I had to make only a very small adjustment to the fineness of the grind (from where it was for the M-28) to achieve a 25 second pull from the M-52. However the shot from the M-52 tasted under-extracted and possessed nowhere near the flavor of the same 25 second pull from the M-28. (Is everybody as confused as I am by all these numbers?) Having drunk enough espressos doing the comparisions to keep skylab from falling I had to finally call a halt to the testing for the day. Tomorrow Im going to try longer extractions on the M-52 and see how they fair.
Longer extractions on the M-52 should not be the problem they are on the M-28 as the M-52s boiler is at a lower pressure/temp. 1.2 bars on the M-28 as oppossed to 0.8 bars on the M-52. Additionally the temperature of the grouphead in the M-52 is controlled by multiple electronic sensors and heaters (all seperately controllable) completely independant of the boiler/HX temp. With this arrangement youd think temperature surfing would be a breeze, and it would, if I could only access the controls! Unfortunately only a few items are available to my control as to access the rest requires a special electronic key, which Cimbali will be happy to sell to you for only $150USD. gggggrrrrrrrrrrrr With-out this key (actually 2 keys for full access) the only thing that you can adjust is the length of the grind, the fineness of the grind, and the amount of water and milk used.
So what were we talking about? Oh yeah, extraction times. So tomorrow Ill try longer extraction times on the M-52 and well see how they taste.
Java "Experimenting away" phile
The Best shot time will vary with the hardware used as well. What works on one machine wont neccesarily work with another.
On my Cimbali M-28 25 seconds is in fact the ideal time. Less than 23 seconds or more than 27 and eeeewwwwww.
Im currently playing around with my Cimbali M-52 to see if it can produce as good a shot as the M-28. If it can then I will be making it my main system over the summer as it puts less heat into the room than the M-28. So far Im not convinced that it can produce as good a shot as in head to head taste tests the M-52s shots are sadly lacking when compaired to the ones being produced by the M-28.
In order to make the comparision fair I am manually grinding the coffee for the shots in the M-52 and using the same exact amount (19.5g for this coffee) as is used in the M-28s pulls. I had to make only a very small adjustment to the fineness of the grind (from where it was for the M-28) to achieve a 25 second pull from the M-52. However the shot from the M-52 tasted under-extracted and possessed nowhere near the flavor of the same 25 second pull from the M-28. (Is everybody as confused as I am by all these numbers?) Having drunk enough espressos doing the comparisions to keep skylab from falling I had to finally call a halt to the testing for the day. Tomorrow Im going to try longer extractions on the M-52 and see how they fair.
Longer extractions on the M-52 should not be the problem they are on the M-28 as the M-52s boiler is at a lower pressure/temp. 1.2 bars on the M-28 as oppossed to 0.8 bars on the M-52. Additionally the temperature of the grouphead in the M-52 is controlled by multiple electronic sensors and heaters (all seperately controllable) completely independant of the boiler/HX temp. With this arrangement youd think temperature surfing would be a breeze, and it would, if I could only access the controls! Unfortunately only a few items are available to my control as to access the rest requires a special electronic key, which Cimbali will be happy to sell to you for only $150USD. gggggrrrrrrrrrrrr With-out this key (actually 2 keys for full access) the only thing that you can adjust is the length of the grind, the fineness of the grind, and the amount of water and milk used.
So what were we talking about? Oh yeah, extraction times. So tomorrow Ill try longer extraction times on the M-52 and well see how they taste.
Java "Experimenting away" phile


;D
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