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Thread: AD filtering question?

  1. #1
    Lifetime Member 67SS509's Avatar
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    Default AD filtering question?

    In the V2 control interface under AD filters what do the numbers 0 thru 5 represent. Sample rate? Damping? Where is the info on this in the user's manual. I couldn't find anything.

    I have been working for several days trying to get the AFR readout on the dashboard to read correct. It is always 1.1 to 1.2 AFR higher than the actual but it is steady now. I'm baseing this on 3 things while running in closed loop...(1)Afr reading from the FJO to the laptop thru serial cable...(2)the narrowband sensors controlling to 14.63 and watching the L-trims...(3)sight, sound and smell for richness or lean and how the engine idles and responds to air- rpm picks up when rich and you add air.

    I have went thru the calibration process and without the engine running everything is correct. Tried altering the expression to make it read 1 AFR lower but that didn't work either.
    2002 Chevy truck, SCSB 2WD, Stroked LS3 w/Big Mutha Thumper cam
    2002SS Camaro LS7/427 with stock suspension setup
    2012 Chevy truck, SCSB 2WD, Magnaflow exhaust + K&N

  2. #2
    Lifetime Member mr.prick's Avatar
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    AFR will float no matter what until you go WOT
    then AFR should be at it's steadiest.
    In CL AFR will float +/-1AFR that is what the NBO2s do,
    AFR will never be solid like commanded AFR is.
    In my experience it can be difficult to distinguish rich/lean by smell.

    If adding/subtracting the offset in the sae_generic.txt or your calc_pids.txt
    does not change things then check to see if the analog ground gives 1volt.

    I don't know how the ADFILTER in the V2 works or what setting is best.
    I think the FJO can be used with serial connection, have you looked into that?
    512k RoadRunner Firmware 12.14R
    FlashScan V2 Bootblock V2.07.04 Firmware V2.07.22 EFILive V7.5.7 (Build 191) V8.2.1 (Build 181)
    LC-1 WBO2

    _________________________________________________

  3. #3
    Joe (Moderator) joecar's Avatar
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    The AD filter number is the number (n) of samples used to average/smooth the AD signal...

    n = 0, 1: no averaging.
    n >= 2: averaging over n samples.

    This isn't in the user manual yet.

  4. #4
    Lifetime Member mr.prick's Avatar
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    Quote Originally Posted by joecar View Post
    The AD filter number is the number (n) of samples used to average/smooth the AD signal...

    n = 0, 1: no averaging.
    n >= 2: averaging over n samples.

    This isn't in the user manual yet.
    A lot of things are not in the manual right not.
    What is n, can that be defined by the user?
    512k RoadRunner Firmware 12.14R
    FlashScan V2 Bootblock V2.07.04 Firmware V2.07.22 EFILive V7.5.7 (Build 191) V8.2.1 (Build 181)
    LC-1 WBO2

    _________________________________________________

  5. #5
    Joe (Moderator) joecar's Avatar
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    Yes, go into V2's setup option screen.

  6. #6
    Lifetime Member 67SS509's Avatar
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    Quote Originally Posted by mr.prick View Post
    AFR will float no matter what until you go WOT
    then AFR should be at it's steadiest.
    In CL AFR will float +/-1AFR that is what the NBO2s do,
    AFR will never be solid like commanded AFR is.
    In my experience it can be difficult to distinguish rich/lean by smell.

    If adding/subtracting the offset in the sae_generic.txt or your calc_pids.txt
    does not change things then check to see if the analog ground gives 1volt.

    I don't know how the ADFILTER in the V2 works or what setting is best.
    I think the FJO can be used with serial connection, have you looked into that?
    I have all the grounds tied together. My FJO does not have a dedicated anolog ground. You would think with my FJO setup to give 0v-5v=10AFR-20AFR then this expression would take care of my problem...
    AFR=V*2+9 instead of AFR=V*2+10

    My FJO uses a serial cable connected to my laptop and works with the FJO software installed. Reading the AFR this way seems to be very accurate but does not give the feature of using the BEN map in EFIlive. How can this be introduced into EFIlive? I don't see a serial port on the V2 interface. What am I not grasping here?
    2002 Chevy truck, SCSB 2WD, Stroked LS3 w/Big Mutha Thumper cam
    2002SS Camaro LS7/427 with stock suspension setup
    2012 Chevy truck, SCSB 2WD, Magnaflow exhaust + K&N

  7. #7
    Lifetime Member mr.prick's Avatar
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    It is the jack next to the USB 1.0 port.
    You will most likely need a null modem not a gender bender with
    the RS-232 cable that came with the V2 and you won't be able to use the FJO
    software for logging. (no big deal)

    Analog is a bit slower and not as consistent as serial with my LC-1 so don't feel bad.
    If the V2 reads a reliable voltage supply properly then the ADs don't need calibration.
    Can you change the response time of the FJO?
    512k RoadRunner Firmware 12.14R
    FlashScan V2 Bootblock V2.07.04 Firmware V2.07.22 EFILive V7.5.7 (Build 191) V8.2.1 (Build 181)
    LC-1 WBO2

    _________________________________________________

  8. #8
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by 67SS509 View Post
    I have all the grounds tied together. My FJO does not have a dedicated anolog ground. You would think with my FJO setup to give 0v-5v=10AFR-20AFR then this expression would take care of my problem...
    AFR=V*2+9 instead of AFR=V*2+10

    My FJO uses a serial cable connected to my laptop and works with the FJO software installed. Reading the AFR this way seems to be very accurate but does not give the feature of using the BEN map in EFIlive. How can this be introduced into EFIlive? I don't see a serial port on the V2 interface. What am I not grasping here?
    See these links for male-null-modem adapter (I don't know what cable your FJO cam with):
    showthread.php?t=9340

    V2 serial/digital wideband logging:
    showthread.php?t=8858
    showthread.php?t=8115
    showthread.php?t=10251 post #2

    V2 serial/digital AFR input (LC-1):
    showthread.php?t=8115
    showthread.php?t=7532
    showthread.php?t=8348
    showthread.php?t=9340

    V2 serial/digital AFR input (PLX):
    showthread.php?t=7726


    With serial cable, you log the serial AFR pid WO2AFR1...

    the serial BEN is BEN1...

    you have to copy one of the analog BEN maps and edit it to use BEN1, and save the map with a new name... you will now have a serial BEN map.
    Last edited by joecar; November 12th, 2009 at 01:01 PM.

  9. #9
    Joe (Moderator) joecar's Avatar
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    A null-modem adapter is different than a gender bender.

  10. #10
    Lifetime Member 67SS509's Avatar
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    Looks like I had my next question answered before I asked it
    2002 Chevy truck, SCSB 2WD, Stroked LS3 w/Big Mutha Thumper cam
    2002SS Camaro LS7/427 with stock suspension setup
    2012 Chevy truck, SCSB 2WD, Magnaflow exhaust + K&N

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