Data logs
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This is a discussion on Data logs within the Tuning: Electronic Engine Management forums, part of the Tech & Modifying & General Repairs category; Hi, Capture some logs last night just wondering how they look? I also noticed the car surges when on boost..its ...

  1. #1
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    Data logs

    Hi,
    Capture some logs last night just wondering how they look?
    I also noticed the car surges when on boost..its not a smooth pull..
    13 wrx on stage 1 normal Westgate
    Thanks for the help

    https://docs.google.com/file/d/0Bz9z...it?usp=sharing

    https://docs.google.com/file/d/0Bz9z...it?usp=sharing


    https://docs.google.com/file/d/0Bz9z...it?usp=sharing
    Last edited by 13psi-; 04-06-2013 at 03:59 PM.

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  3. #2
    Master Baiter EJ257's Avatar
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    FYI, two of the logs are the same CSV file...

    That said, something caused the car to pull timing via FLKC, but as you progress through Datalog5 and Datalog7, you can see the ECU is adding timing back in.

    There is no real boost oscillation, so your description of "surging" could be your misunderstanding of how a F/I motor operates. Where in the RPM range does it not feel "smooth"?
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    Registered User jsBLwrx's Avatar
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    EJ, op could be referencing the wastegate cycle which can be unnerving at first....

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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by jsBLwrx
    EJ, op could be referencing the wastegate cycle which can be unnerving at first....
    Exactly what I'm referencing in my last part.
    2005 WRX STi (Mods | Virtual Dyno)

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    Ok what you saying is the westgate was releasing the boost
    I thought I felt the surge also without being in the boost around the 3k rpm range or at very low boost today

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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by 13psi-
    Ok what you saying is the westgate was releasing the boost
    I thought I felt the surge also without being in the boost around the 3k rpm range or at very low boost today
    There's a surge when the turbo kicks in. It's completely different from N/A acceleration; I think what you're feeling is normal.
    2005 WRX STi (Mods | Virtual Dyno)

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  8. #7
    Registered User jsBLwrx's Avatar
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    ^^^ +1

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    The surge i felt was like if the lights where flicking before they went out bright then dim then bright and so on ...if that explains it any better…
    Here is a new log that I took yesterday..

    https://docs.google.com/file/d/0Bz9z...it?usp=sharing

  10. #9
    Moderator Donkey's Avatar
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    Probably some "boost oscillations". Hard to tell due to Cobb's poor datalogging resolution. A "Protune" would fix that.
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