Can someone please look at my datalog?

[Sean80]

I have attached a datalog from an on-ramp involving WOT in 3rd gear. I'm a noob when it comes to tuning and would like someone with experience to look at it. I have highlighted the section where I'm full throttle in yellow. Everything as far as I can tell looks good except the one instance of knock retard. Is this something I should be worried about? I'm not sure how to attach the whole file, but I took a screenshot of the section in question.

I have a Cobb SRI, TIP, Forge BPV and am running the Stage 1 + Cobb SF 91 octane map. Thanks for any help!

http://img693.imageshack.us/img693/7351/datalog2.jpg

[WeatherB]

Too much knock... Why are you WOT only from 5000 to 6000rpm?

[Sean80]

I was rounding a corner and then punched it when the road straightened out. Is that why there is knock retard?

[Sean80]

I'm still running the same map, but have switched up to Sunoco 94 gas and have put the Denso IVT 22 plugs in the car. Now I'm seeing quite a bit of knock at part throttle. Here is a link to my datalog:http://www.cobbforums.com/forums/attachment.php?attachmentid=2281&d=1271610059

Any ideas why this would be? I was under the impression that better gas and the IVT 22's would reduce the knock....

I have been doing some reading and have read that as long as the KR doesn't occur while under boost/WOT it's fine. Is this true?

[sas]

I “photoshoped” it for better understanding.
http://i709.photobucket.com/albums/ww96/sas2000_album/SEANs_Datalog1.gif
In this time it’s a bit different knock, appeared after gas pedal was released.
Don’t ask me why, I don’t know. The all is looking normally ,STFT dropped earlier then
the knock happened, but could be the too sluggish O2 sensor. Maybe old sets are stored in the PCM.
There is one abnormal thing. Actually, you have a normal fuel pressure because the LTFT floats near null values, but “logged” fuel pressure is too high even for kPa.
You can get a more precise graph if you log a less number of parameters.
I think at this moment are most important RPM, Knock retard, Fuel Pressure, First O2
, Mass Airflow ,Absolute Throttle Position .

[laksman91]

Maybe if you're to redo a log, I'd say do a 3rd gear pull to redline... much easier than a 4th. From around 2000ish I guess.

[Sean80]

I “photoshoped” it for better understanding.
http://i709.photobucket.com/albums/ww96/sas2000_album/SEANs_Datalog1.gif
In this time it’s a bit different knock, appeared after gas pedal was released.
Don’t ask me why, I don’t know. The all is looking normally ,STFT dropped earlier then
the knock happened, but could be the too sluggish O2 sensor. Maybe old sets are stored in the PCM.
There is one abnormal thing. Actually, you have a normal fuel pressure because the LTFT floats near null values, but “logged” fuel pressure is too high even for kPa.
You can get a more precise graph if you log a less number of parameters.
I think at this moment are most important RPM, Knock retard, Fuel Pressure, First O2
, Mass Airflow ,Absolute Throttle Position .

Thanks. What did you use to plot that graph?

[Sean80]

Maybe if you're to redo a log, I'd say do a 3rd gear pull to redline... much easier than a 4th. From around 2000ish I guess.

I'll try that tomorrow and see how it turns out.

[sas]

You can import data into Excel. In this case the Excel interpreted the “tab” incorrectly, so
I had to replace “tab” symbol by “semicolon” using Notepad.
Then were added columns where parameters lying far lower or higher then 100 were scaled by dividing or multiplication.For example content of such cell is looking in this way: =A2/100 or =H2*10
You can set the content only for one cell, then copy the cell and Excel will correct the source address automatically. For speed, copy one cell then two, and then copy by block of cells.
After that you can build the graph.

[sas]

Here is a thread started by Fobio, the fuel pressure is normal , the pressure was already multiplied to 10 by cobb and maximal fuel pressure you have is 165 psi. You can exclude the fuel pressure from log list.