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Thread: Knock Headphone Setups?

  1. #21
    Lifetime Member Mitco39's Avatar
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    Thanks for the info again Joe! I will do the same thing next time I am on the dyno. My knock setup showed up so I am curious to see how those results compare with the factory ecm.

  2. #22
    Joe (Moderator) joecar's Avatar
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    Mitch,

    Which knock phone did you get...?

    I'm thinking that the knock phone output might be recordable via the FSV2 AD inputs (if has range 0-5V)...

  3. #23
    Lifetime Member Mitco39's Avatar
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    I got the Plex V2

    http://www.plex-tuning.com/products/plex-knock-monitor/


    What I like about other softwares (and this may be a limitation on the OEM not eflive) but with ECUtek for example you can see the readings from the knock sensors as a raw signal, so instead of just seeing the measured knock as per the ECM you get the raw signal as well as the amount or retard the ecm thinks is a valid amount. Looking at all the reviews on this it seems like this will be the best way to see and hear that raw signal as well.

    This one does have the ability to output knock readings.

    I am excited to play with it and see how it works.

  4. #24
    Joe (Moderator) joecar's Avatar
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    On some LS1B's the following pids provide raw knock counts:
    - GM.ESC1DNL
    - GM.ESC2DNL

    I've seen those pids work on some PCM's and not others.

  5. #25
    Joe (Moderator) joecar's Avatar
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    That is a nice knock phone, has good features.

  6. #26
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    so you spent $1000 on that devise. what about just a microfone and phones? you could add an adjustable filter/amplifier. knock is around 3000hz with our bore, right?

  7. #27
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    I would like to toss in a few more names to get feedback on some other chassis ears / knock headphone setups.

    1. J&S Safeguard (not the main purpose but it does have a headphone output)
    2. Phormula (is it still around?)
    3. The Knock Box

    Any thoughts on any of the above?

    To make the list more complete and put everything in one place, most of these have also been discussed:
    Mitco39's DIY setup
    Plex Knock Monitor v2 (discontinued)
    Plex Knock Monitor v3 (not yet available)


    Thanks for any help.

  8. #28
    Joe (Moderator) joecar's Avatar
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    Thanks for posting.

    The V3 is expensive, but has many features including CAN bus connectivity, programmable knock threshold, and advanced filtering.

  9. #29
    Lifetime Member Doc's Avatar
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    I have been on the Plex V3 pre-order list since March. Hopefully should arrive sometime soon. Really interested in testing it out. Are there those on the forum that have already received theirs?

    2000 Silverado Full Size 4x4: Forged 6.2, H/C F1R Procharger
    98A4 Z28: 02 PCM H/C Forged 347, 9" Moser 3.73
    V1 V2 99+up RR COS #5 OLSD Dual Stg N20
    www.efialchemy.com
    www.greatamericancarwar.com

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