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Perfect setpoint value for PIDd Silvia

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  • Perfect setpoint value for PIDd Silvia

    I would like to ask anyone who had fitted a PID to their Silvia if they have tried changing the setpoint value to a setting lower than 109 C?

    I got my PID from Jim so it was set to 109 C which is equivalent to 228F.

    Has anyone tried setting it to 108.5, or 108, or 107 C and see a change in taste on the cup?

    Using my manual test of measuring brew temp (styro cup with steam thermo stuck in the bottom), I consistently get 95 C on the brew temp. Havent tried changing the SV yet so I wanted to know if someone has tried it.

    Its a matter of curiosity on my side.

  • #2
    Re: Perfect setpoint value for PIDd Silvia

    Originally posted by dcaffeine8d link=1185868713/0#0 date=1185868713
    I would like to ask anyone who had fitted a PID to their Silvia if they have tried changing the setpoint value to a setting lower than 109 C?

    I got my PID from Jim so it was set to 109 C which is equivalent to 228F.

    Has anyone tried setting it to 108.5, or 108, or 107 C and see a change in taste on the cup?

    Using my manual test of measuring brew temp (styro cup with steam thermo stuck in the bottom), I consistently get 95 C on the brew temp. Havent tried changing the SV yet so I wanted to know if someone has tried it.

    Its a matter of curiosity on my side.
    No reason not to give it a shot.

    Generally, dark roasts will be better suited with a higher brew temperature and lighter roasts will do well with a lower temp. I tend to like a brew temp of around 94 deg C- a touch cooler than typical for the US.

    If you are happy with the shot, but taste sourness, a higher brew temp may assist...

    2mcm

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    • #3
      Re: Perfect setpoint value for PIDd Silvia

      I always had my (late) Silvia set at 108°, but placing the thermocouple elsewhere on top of the boiler would have meant changing the set point.

      I doubt very much though, whether a .5° variation is going to make any noticeable difference. If at all.

      But as 2MCM said, no harm in trying.

      -Robusto

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      • #4
        Re: Perfect setpoint value for PIDd Silvia

        Hi dcaffeine8d
        I have done PID work on a Botticelli and Quaha and have done exactly what you have suggested- I got espresso glasses and made shots three degrees either side of the accepted ideal. My daughter and I sampled them and found an ideal but one degree either side was nice but different.
        Give it a go and let people know the results- its all about taste after all!
        Brett

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        • #5
          Re: Perfect setpoint value for PIDd Silvia

          Hi decaffeine8d,

          I was determined to try same thing and have run my Silvia as low as 105 (I think), which worked for some relatively lightly roasted beans, but I have found that generally somewhere around 108 is best overall.

          Due to the way the PID and thermocouple are set up I would suggest that it is probably best to start with a 2 or 3 deg difference in set point. See what it tastes like, if you like it great, if not youve still learnt something.

          Regards
          Bullitt

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          • #6
            Re: Perfect setpoint value for PIDd Silvia

            Thanks to all those who responded.

            I took the plunge last night with a a blend called Espresso Cioccolato (Yemen Mokha, African, Indonesian, Central American bean) from one of the online sites.

            I set it to 108C, a degree lower than my original setting which yielded a 85C brew temp using my wildly inconsisten temp method (as I mentioned before, my 109C gave me a 95C brew temp, but for some reason I couldnt replicate it anymore).

            I finally gave up on measuring the brew temp and just started trusting my palate.

            What can I say, I have not really done real cupping but I can tell you that the coffee tasted better at 108 C for my initial test. I can really taste the mocha flavor now.

            I also managed to get a response from Jim (Pidkits) on the proper measurement they get for the brew temp at some setpoint using I think the Greg Scace device (http://www.espressoparts.com/product/EP-THERMOFILTER) .

            Find his reply below:

            ---snip----
            On my 2 Silvias, after around 1 hour warmup, a setpoint of 228F (108.9C), I generally get a brew temperature of around 201F (93.9C).
            ---snip----

            So based from this findings, Ill try the +/-2C change from the base 109C. He says it should be a 1:1 change when the SV is change.

            So it would something like:

            SV = Brew temp

            110 = 95
            109 = 94
            108 = 93
            107 = 92

            And I think he mentioned or I heard it somewhere that the ideal brew temp should be between 92-95.

            regards,

            Paul

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