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E30 brake temperature monitor

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    #16
    I have thermocouple bulk wire sourced. Insulated to withstand 2000F.

    Got a lot cost, easy to mount probe tip figured out for the pad.

    Sourced a low cost stepper motor and MCU with precision analog for the gauge.

    Gage face spec'd out. Will post a pic soon.
    "And then we broke the car. Again." Mark Donohue, "The Unfair Advantage"

    1987 E30 3L Turbo Stroker Das Beast
    2002 E39 M5

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      #17
      Here's the gauge face so far

      Last edited by dvallis; 02-16-2017, 02:59 PM.
      "And then we broke the car. Again." Mark Donohue, "The Unfair Advantage"

      1987 E30 3L Turbo Stroker Das Beast
      2002 E39 M5

      Comment


        #18
        You need to add an orange section. Also, remember that heat range depends on pad types. Some totally love 1000°F while others melt at that temp.
        Brake harder. Go faster. No shit.

        massivebrakes.com

        http://www.facebook.com/pages/Massiv...78417442267056





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          #19
          Lee

          Since this is for racing pads we can focus on those. From the graphs I posted, racing pads like to operate between 500F and 1200F. It's a generalization but you need to start somewhere. I'm considering 400F at 9 o'clock, 800F at 12 o'clock and 1200F at 3 o'clock.

          To your comment 1200F - 1400F could be orange and 1400F - 1600F would be red.

          Thanks for the input.
          "And then we broke the car. Again." Mark Donohue, "The Unfair Advantage"

          1987 E30 3L Turbo Stroker Das Beast
          2002 E39 M5

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            #20
            The other alternative is a programmable RGB LED ring. That has possibilities and makes the gauge more useful, as in for street pads as well. Looking into this.
            "And then we broke the car. Again." Mark Donohue, "The Unfair Advantage"

            1987 E30 3L Turbo Stroker Das Beast
            2002 E39 M5

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              #21
              So, here's the new and improved gauge face. Has 4 programmable colors for brake state:

              Blue : Cold
              Green: Operating temp
              Yellow: Upper limit of operating temp
              Red: Exceeding operating temp

              Color range is programmed by turning knob on face of the gauge. Press in on knob to change color being programmed. Example:

              Press knob for 2 sec to enter programming mode
              Blue upper limit starts flashing
              Turn knob to set blue upper limit
              Click knob
              Green upper limit starts flashing
              Turn knob to set green upper limit
              Click knob. Yellow upper limit starts flashing
              Turn knob to set yellow upper limit
              Click to exit program mode. LEDs stop flashing

              Gauge remembers color settings when car is powered down. You only have to program it once for any pad type.



              Comments?
              Last edited by dvallis; 02-16-2017, 10:25 PM.
              "And then we broke the car. Again." Mark Donohue, "The Unfair Advantage"

              1987 E30 3L Turbo Stroker Das Beast
              2002 E39 M5

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                #22
                that looks much easier to comprehend at a glance than the first one or even a digital display
                Shawn @ Bimmerbuddies
                Bimmerbuddies LLC
                717-388-1256
                2971a Roundtop Rd, Middletown PA 17057
                bimmerbuddiesllc@gmail.com

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                  #23
                  What is the response time like?

                  I have a good bit of brake temp data from MX-5 ST cars if you want to check it out, just to see what the temps do.
                  - '88 m54 coupe

                  <3

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                    #24
                    Response time will be in ~1 millisecond, so you will have the feel of a true analog gauge.

                    Would definitely like to see that data. Please PM it to me.

                    Come to think of it, I'll add a 0-5V brake temp output so the gauge can be monitored and data logged by any racing dash. Like the idea?
                    "And then we broke the car. Again." Mark Donohue, "The Unfair Advantage"

                    1987 E30 3L Turbo Stroker Das Beast
                    2002 E39 M5

                    Comment


                      #25
                      Color LED ring + driver electronics will add $40 to gauge resale. Ouch. I think that idea goes into "nice to have" bin.
                      "And then we broke the car. Again." Mark Donohue, "The Unfair Advantage"

                      1987 E30 3L Turbo Stroker Das Beast
                      2002 E39 M5

                      Comment


                        #26
                        Originally posted by dvallis View Post
                        Color LED ring + driver electronics will add $40 to gauge resale. Ouch. I think that idea goes into "nice to have" bin.
                        A sticker costs $1.00 to print ;-)
                        Brake harder. Go faster. No shit.

                        massivebrakes.com

                        http://www.facebook.com/pages/Massiv...78417442267056





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                          #27
                          Originally posted by dvallis View Post
                          Response time will be in ~1 millisecond, so you will have the feel of a true analog gauge.

                          Would definitely like to see that data. Please PM it to me.

                          Come to think of it, I'll add a 0-5V brake temp output so the gauge can be monitored and data logged by any racing dash. Like the idea?
                          That would be a nice addition for sure.

                          I'll PM you when I get home, I have racing stuff on a separate computer. We use Texense IR sensors, I've never purchased them myself but I get the feeling they're pretty pricey
                          - '88 m54 coupe

                          <3

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                            #28
                            Texense = $2,400 for 4 sensors.
                            "And then we broke the car. Again." Mark Donohue, "The Unfair Advantage"

                            1987 E30 3L Turbo Stroker Das Beast
                            2002 E39 M5

                            Comment


                              #29
                              Originally posted by dvallis View Post
                              Texense = $2,400 for 4 sensors.
                              Ha, right + Motec SDL3 = $Dumb$

                              We only run 2 channel (F/R) because we're usually only looking for pad temp ranges @ a certain track, or a difference from one driver to another.
                              - '88 m54 coupe

                              <3

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                                #30
                                Without the color LEDs.

                                Simple, just works. And the dash / data logger output is a nice touch.

                                Last edited by dvallis; 02-17-2017, 07:09 PM.
                                "And then we broke the car. Again." Mark Donohue, "The Unfair Advantage"

                                1987 E30 3L Turbo Stroker Das Beast
                                2002 E39 M5

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