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Old 08-05-2012, 06:52 PM   #1
dTek
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Member#: 258446
Join Date: Sep 2010
Chapter/Region: SCIC
Location: San Diego, CA
Vehicle:
2011 WRX Sedan
06 STi. Both WRB

Default Knock concerns. Data log, please have a look

Ive seen the data log videos but they seem kind of broad. Im seeing some knocking/correction/feedback here and am praying that Im still ok. I dont have the cash to tear apart my motor right now and start replacing stuff. Thanks so much for the help.

(ACN 91 stage 1 flash. 06 STI, only mods are SPT CB exhaust and a drop in K&N filter)


https://docs.google.com/spreadsheet/...G8zY0RIQmhxdGc
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Old 08-06-2012, 03:05 AM   #2
bacalhau16
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Join Date: Oct 2011
Location: Dartmouth, MA
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Silver

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Do a proper log. For your STI, be in 4th gear at about 2k rpm and do a pull to redline, if safe to do so.
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Old 08-06-2012, 10:35 AM   #3
Cobb Tuning
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Location: Austin, DFW, Portland, SOCAL
Default

Quote:
Originally Posted by dTek View Post
Ive seen the data log videos but they seem kind of broad. Im seeing some knocking/correction/feedback here and am praying that Im still ok. I dont have the cash to tear apart my motor right now and start replacing stuff. Thanks so much for the help.

(ACN 91 stage 1 flash. 06 STI, only mods are SPT CB exhaust and a drop in K&N filter)


https://docs.google.com/spreadsheet/...G8zY0RIQmhxdGc
How long has it been since your reflashed a map (or installed AccessPORT) or reset the ECU?

Bill
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Old 08-06-2012, 05:20 PM   #4
dTek
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Member#: 258446
Join Date: Sep 2010
Chapter/Region: SCIC
Location: San Diego, CA
Vehicle:
2011 WRX Sedan
06 STi. Both WRB

Default

Bill-
I got the car in late may from a dealership and the AP a little later. I made sure I updated the software also as I bought the AP used locally. Here is another log that I did last night. It looks better. RPMs only logged to 6.7 but I took it to redline. Maybe I hit the button a second before actually getting to redline. Both logs were done in 4th gear.
Always use Chevron 91. I filled up again before doing this log. Maybe I had some weak gas or something before, idk.

https://docs.google.com/spreadsheet/...zBEOW4zakREQWc

I'll take another one today on the way home from school when the roads..err..."closed course" is open lol. No reflash or reset of ECU but Ive only had the tune on there for less than 3 months.
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Old 08-07-2012, 02:07 AM   #5
dTek
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Member#: 258446
Join Date: Sep 2010
Chapter/Region: SCIC
Location: San Diego, CA
Vehicle:
2011 WRX Sedan
06 STi. Both WRB

Default

Ok, took this one tonight on the way home. I dont know what was up with that first log, but this one looks just about perfect, no? Thanks for all the help and customer support Bill. Nice to see you guys so active helping people on here.

https://docs.google.com/spreadsheet/...3hfa2pBMkZMM2c
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Old 08-07-2012, 11:16 AM   #6
Cobb Tuning
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Quote:
Originally Posted by dTek View Post
Bill-
I got the car in late may from a dealership and the AP a little later. I made sure I updated the software also as I bought the AP used locally. Here is another log that I did last night. It looks better. RPMs only logged to 6.7 but I took it to redline. Maybe I hit the button a second before actually getting to redline. Both logs were done in 4th gear.
Always use Chevron 91. I filled up again before doing this log. Maybe I had some weak gas or something before, idk.

https://docs.google.com/spreadsheet/...zBEOW4zakREQWc

I'll take another one today on the way home from school when the roads..err..."closed course" is open lol. No reflash or reset of ECU but Ive only had the tune on there for less than 3 months.
Nothing overt in your logs - you do have feedback knock in the middle of your WOT run in this log, which would be the most concerning event. There is some feedback knock near when mashing the throttle in the other logs, but this is generally noise.

I would go ahead and download the low wastegate (LWG) map from our maps section at cobbtuning.com and reflash it. Your a little above your peak boost target and the low wastegate map will help with this and may also improve the sporadic knock event.

Also, I would keep an eye on your A/F Learning 1 A, B, C, D values over time. Generally, these should be within +/- 5%. You do have one at 5%, so you are on the borderline there. They are also all trending positive in your logs, which by itself is not a big deal, but combined with the borderline trim, it may be something that you want to keep an eye on for now. If that gets much worse outside of +/- 5%, there might be a fueling issue related to a mechanical problem.

Bill
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