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Old 07-15-2012, 01:54 AM   #1
DrStinkPinky
Scooby Newbie
 
Member#: 326086
Join Date: Jul 2012
Chapter/Region: Tri-State
Location: NJ
Vehicle:
2012 WRX 4DR Limited
ISM

Default Should I be concerned with these logs?

Hey all, been trying to further understand everything about my new car here, so I decided to take a few logs and make sure everything looked alright. Currently stock, cobb stage 1 93oct map.

https://docs.google.com/spreadsheet/...tT3czb1E#gid=0

https://docs.google.com/spreadsheet/...DOGVFSHc#gid=0

https://docs.google.com/spreadsheet/...wMEpYVlE#gid=0

Now, I noticed some fine knock learn around 5k rpm in all my logs and was wondering if I should be concerned about it? I believe I read on the cobb site that values under -2.8 that reduced in value over the next few cells would not be a reason for concern, but I also felt it was mentioned that was for low load conditions. Being that I'm just trailing off of peak boost when seeing it, was my main reason for seeking assurance.

If it is a reason for concern, or any other information in the logs that strikes you as abnormal, I would greatly appreciate the feedback. Thanks.
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Old 07-15-2012, 10:05 AM   #2
Cobb Tuning
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Member#: 4803
Join Date: Mar 2001
Location: Austin, DFW, Portland, SOCAL
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Quote:
Originally Posted by DrStinkPinky View Post
Hey all, been trying to further understand everything about my new car here, so I decided to take a few logs and make sure everything looked alright. Currently stock, cobb stage 1 93oct map.

https://docs.google.com/spreadsheet/...tT3czb1E#gid=0

https://docs.google.com/spreadsheet/...DOGVFSHc#gid=0

https://docs.google.com/spreadsheet/...wMEpYVlE#gid=0

Now, I noticed some fine knock learn around 5k rpm in all my logs and was wondering if I should be concerned about it? I believe I read on the cobb site that values under -2.8 that reduced in value over the next few cells would not be a reason for concern, but I also felt it was mentioned that was for low load conditions. Being that I'm just trailing off of peak boost when seeing it, was my main reason for seeking assurance.

If it is a reason for concern, or any other information in the logs that strikes you as abnormal, I would greatly appreciate the feedback. Thanks.
A lot of times, the single count fine knock learning (-1.4) is noise due to lifting off the throttle abruptly at the end of a wide open throttle (WOT) run. I wouldn't worry about this. You will see it re-applied over and over again within a certain load/RPM range (well after the original event) and it will eventually learn back to zero (which is what is happening in your logs). If you see multiple counts (-2.8 or worse) of fine knock learning or you see feedback knock correction (-1.4 or worse) in the middle of the WOT run, then they may indicate an issue. Try taking a few more logs.

Bill
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