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Discussion Starter #1 (Edited)
Could anyone take a look at my data logs? These are starting in second gear.

2011 WRX stock
Cobb Stage 1 93

I have only been stage 1 for a day. These logs are from it being stage 1 for maybe 30 miles.

I see the fine knock in one small pull, and not in the other.

Can you please diagnose me, doc? Ha.

https://docs.google.com/spreadsheet/ccc?key=0ApsT4pPzGP7ndHVmS2tLb1QwYnhsMVo0RDFlY1pRY2c


https://docs.google.com/spreadsheet/ccc?key=0ApsT4pPzGP7ndE12V0pOd0xSazQxb01rbUt1Zy1HLXc

I appreciate it.

Rob
 

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Is that a 3rd gear WOT pull?? Your boost numbers seem a little crazy for a complete pull. It seems to me that was letting on and off the gas
 

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Discussion Starter #4
Thank you. Will log for knock next time...

Yes, the third gear pull was WOT and the boost fluctuated for some reason...
 

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robdoe1022 said:
Thank you. Will log for knock next time...

Yes, the third gear pull was WOT and the boost fluctuated for some reason...
You were WOT for a portion of each log, but not 2K-redline
 

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robdoe1022 said:
With datalogs, less is more.

For example, in the idle log, remove the following:
Accel. Position (%)
Boost (PSI)
Dynamic Adv. (°)
Knock Sum Cyl 1-4 (count)
TD Boost Error (PSI)
Throttle Pos. (%)
Wastegate Duty (%)

At idle, they tell us nothing, and that means it only reduces resolution.

For the others, remove Accel %, and Dynamic Advance °. With a DAM=1, Ignition Timing is all the information we need.

That said, cruise/idle look fine.

Do a complete 3rd gear pull with only the following logged:
RPM
Load (g/sec)
Boost
FLKC
FBKC
DAM
Throttle angle

Make sure you get the entire 2K-redline range in your log. It's fine to have some extraneous points in the log as long as you get the full log.
 

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It's not a big deal. All cars knock a little here and there. When you look at all the variables the ECM has to try and compensate for you know to expect something like that. Could be gas quality or one of the compensation tables might need a slight tweak but a degree of timing pulled is no big deal and thats the whole purpose of having active timing. Anything over say -2 that becomes repeatable I would go back and clean the MAF and re-log. If still there I might then pull out a degree or two from the timing map in the problem area. Also read this: RomRaider • View topic - How To: Read Data Logs
 
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