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Varying distance for heat gun

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  • Varying distance for heat gun

    I have been interested in various comments by others regarding time and temp from first to second crack.

    So, for my past 3 roasts I have been experimenting with raising my HG once the beans get into FC. Obviously this lengthens the time to SC and is supposed to enhance, improve, change, enrich flavour.

    Have drunk 2 of the roasts and I have to say that so far I have not noticed any appreciable difference in taste by lengthening time between cracks.

    Did another tonight, so have posted the graph so you can see the cracks and temp increases.

    I am going to continue to experiment by taking longer to get to FC as well as to SC, but so far my unsophisicated palate cant taste any difference between mucking around with the temp and roasting the hell out of them.

    Would appreciate your comments.


  • #2
    Re: Varying distance for heat gun

    Rowdee...

    Looks like you are going well into second crack judging by your graph. (Bit hard without knowing the bean variety as some have higher 2nd crack than others).

    I find the best flavours are no more than 20 seconds into 2nd crack....

    And if you look at my graphs in the datalogger file you will get an idea of the profile I use...

    Generally about 8-9 minutes to start of FC which goes for a minute or two (depends a bit on variety of bean) then I aim for an additional 5-6 minutes before the start of second .... then 20 seconds and pull the roast.

    You also want to try to eliminate the dip in temperature at about 215C... the temp should slowly and smoothly ramp up to the second crack.... stalling of temp (or going backwards even more so) affects the taste adversely.

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    • #3
      Re: Varying distance for heat gun

      Originally posted by JavaB link=1168502101/0#1 date=1168502613
      Rowdee...

      Looks like you are going well into second crack judging by your graph. (Bit hard without knowing the bean variety as some have higher 2nd crack than others).

      the second crack.... stalling of temp (or going backwards even more so) affects the taste adversely.
      Thanks JavaB,

      So far I have tried 3 different bean types for which I have previous data and am going to try them again lengthening time to FC.

      I am pretty consistent in taking beans about 20 seconds into rolling second crack.

      Nothing wrong with the taste, what I am saying is that as yet, havent noticed a great difference.

      Comment


      • #4
        Re: Varying distance for heat gun

        JavaB,

        I forgot to say that this graph is Costa Rica Santa Elena and last roast didnt hit first crack until 215, tonight hit first crack at 211, second at 230. Bit higher than I am used to.

        Comment


        • #5
          Re: Varying distance for heat gun

          Originally posted by rowdee link=1168502101/0#3 date=1168505068
          JavaB,

          I forgot to say that this graph is Costa Rica Santa Elena and last roast didnt hit first crack until 215, tonight hit first crack at 211, second at 230. Bit higher than I am used to.
          That is high for sure.... where do you have your temp probe? The best seems to be about 1 cm above the bottom of BM bowl in the corner furthest from the HG.... that way you are measuring the temp of the beans (or at least the air surrounding the beans) without the blast from the HG or interference from the bowl (stays cooler than the bean mass).

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