2011 wrx cobb stage 2 datalog problems?
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This is a discussion on 2011 wrx cobb stage 2 datalog problems? within the Tuning: Electronic Engine Management forums, part of the Tech & Modifying & General Repairs category; I decided to go back to stage 2 this weekend, and i ran a few datalogs a few days ago ...

  1. #1
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    2011 wrx cobb stage 2 datalog problems?

    I decided to go back to stage 2 this weekend, and i ran a few datalogs a few days ago and today. my first couple logs looked good, at the time i didnt have enough room on the road so they were only 2nd gear pulls. to me they looked great the boost numbers look good and i didnt have any knock. after i did my datalog today i was looking at it and it looked great too, until i noticed that my boost numbers were going to 37 pounds as soon as i let off the gas to shift! ive been lookin online to see if it was normal but im pretty sure its not. any clue on whats causing this? should i not worry about it? and hows the rest of my logs look. got a -1.4 in feedback and fine knock once, as i got back on the gas after shifting im not too worried about it though

    my setup is cobb stage 2 sf+ 93 octane OTS map with cobb sf with box. invidia catted downpipe with SPT catback

    2nd gear wot pull
    https://docs.google.com/spreadsheet/...mc&usp=sharing

    3rd gear wot pull
    https://docs.google.com/spreadsheet/...2c&usp=sharing

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  3. #2
    Master Baiter EJ257's Avatar
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    37PSI is an error in the log

    Your knock is on throttle change.
    2005 WRX STi (Mods | Virtual Dyno)

    Resident Tuner @ WTF Tuning, LLC

    "Never trust anything that bleeds for a week and lives ..."

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    Heres another log from today, no FBK but i did get a little FNL. is it normal to have a little knock with a stage 2 wrx?


    https://docs.google.com/spreadsheet/...FE&usp=sharing

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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by slow wrx
    Heres another log from today, no FBK but i did get a little FNL. is it normal to have a little knock with a stage 2 wrx?

    https://docs.google.com/spreadsheet/...FE&usp=sharing
    The ECU has learned to pull timing preemptively as a way to prevent knock, when it shows up in the FLKC table. It's not necessarily "normal", but it's the knock control strategy doing its job. Do you always get gas at the same place?
    2005 WRX STi (Mods | Virtual Dyno)

    Resident Tuner @ WTF Tuning, LLC

    "Never trust anything that bleeds for a week and lives ..."

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    i usually get gas at sunoco but ended up filling up at luk oil this time. maybe i got some bad gas?

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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by slow wrx
    i usually get gas at sunoco but ended up filling up at luk oil this time. maybe i got some bad gas?
    Could be. Finish the tank, fill up elsewhere and see if it goes away.
    2005 WRX STi (Mods | Virtual Dyno)

    Resident Tuner @ WTF Tuning, LLC

    "Never trust anything that bleeds for a week and lives ..."

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    little update, ran a 3rd gear wot run today and thats 3 datalogs now showing fine knock learn in the middle of the wot pull. any ideas on how to fix this?

    https://docs.google.com/spreadsheet/...Hc&usp=sharing

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