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Thread: Brew pressure reading

  1. #1
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    Brew pressure reading

    Hi All,

    I recently had my Minore serviced, and I added a brew gauge to the group head.
    Now the question is if the readings I am getting are right, or if I should be adjusting the brew pressure.

    first reading I am getting is with the blind filter in, and it sits at about 9.5/10.

    Then, with the actual pour, i am getting about 9. The problem is, the pour is quite slow.
    Using a double basket, with 18grms of coffee, getting about 35g-40g in 30 sec.

    When I backed the grind off a bit, the reading on the brew guage was at 8.
    So, do I up the brew pressure, or is the reading with the blind what I should be hitting.....

    TIA
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  2. #2
    Mal Dimal's Avatar
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    Sounds spot-on to me mate...

    I'd leave the OPV setting well and truly alone.

    Mal.
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  3. #3
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    I can't add value to the thread but interested how the gauge is adde to machine. Was the group head drilled, thread tapped and gauge installed off that?

  4. #4
    Senior Member level3ninja's Avatar
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    Quote Originally Posted by Mb21 View Post
    I can't add value to the thread but interested how the gauge is adde to machine. Was the group head drilled, thread tapped and gauge installed off that?
    Most E61 be heads have a threaded hole from the factory, it's just usually plugged with a grub screw. Search Google images for E61 gauge screw and it should be apparent.

  5. #5
    Senior Member Jono_Willmer's Avatar
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    I've heard of people adding temperature gauges this way, but I'm very interested to follow this thread to see the outcome, all the best with it mate.

  6. #6
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    Yeah, it was just an easy add on by removing a screw, and adding it, with a bit of seal tape. I saw it added to some machines at the place I had it serviced, and asked to add it. Took a minute.

    Next question is about getting 18-19 grms in a double basket? I think i should get a smaller (15g maybe) basket. Any less than 18 and the expobar ends up with a sloppy pluck....

  7. #7
    Senior Member LeroyC's Avatar
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    18g dose. 35-40g yield in 30sec sounds excellent to me and I'd be leaving everything as it is, unless of course it doesn't taste any good.

    At the moment I'm usually dosing about 21-22g and aiming for a yield of 28-32g in 30-40secs depending on the coffee. I only ever work outside those parameters for very light roasts.

  8. #8
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    sounds like a short pour.
    going with the average of 14g/60ml for a double, seems short. what volume are you getting with the 32g? I am averaging the 1g=1ml

  9. #9
    Senior Member level3ninja's Avatar
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    Behmor Brazen - $249 - Free Freight
    1g does not equal 1ml though. Crema weighs very little but must little count it in their volume measurement.
    I am currently running 19.5g in and about 32g out, it's a bit shorter than some but including crema I would estimate it to be about 55ml, so not super short.
    Dimal likes this.

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