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Old 07-11-2012, 07:34 PM   #1
fightex
Scooby Newbie
 
Member#: 314063
Join Date: Mar 2012
Chapter/Region: W. Canada
Location: Calgary, Canada
Vehicle:
2012 STI Sport Tech
SWP

Default 2012 STI Stage1 91oct datalog...concerns?

Hey guys

I just installed AP and flashed to stage 1 91oct on my 2012 STI. I did two datalogs which are linked below:

https://docs.google.com/spreadsheet/...UhuUndLeEQ4M1E

https://docs.google.com/spreadsheet/...HFGU3FIcXR3X1E

Should I be concerned at all regarding the feedback knock correction as in both datalog runs it seems to manifest around when I hit peak boost. The other concern I have is if I should be worried about the AF learning 1 as it did drop compared to my first run.

Some other info that may help is that the altitude where I live is around 3500ft and the ambient temperature was around 80F during both runs. Also both runs were in S# and Auto-.

Any insight would be greatly appreciated as I am fairly new to the tuning side of the Subaru world.

Thanks
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Old 07-12-2012, 09:29 AM   #2
Cobb Tuning
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Member#: 4803
Join Date: Mar 2001
Location: Austin, DFW, Portland, SOCAL
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Originally Posted by fightex View Post
Hey guys

I just installed AP and flashed to stage 1 91oct on my 2012 STI. I did two datalogs which are linked below:

https://docs.google.com/spreadsheet/...UhuUndLeEQ4M1E

https://docs.google.com/spreadsheet/...HFGU3FIcXR3X1E

Should I be concerned at all regarding the feedback knock correction as in both datalog runs it seems to manifest around when I hit peak boost. The other concern I have is if I should be worried about the AF learning 1 as it did drop compared to my first run.

Some other info that may help is that the altitude where I live is around 3500ft and the ambient temperature was around 80F during both runs. Also both runs were in S# and Auto-.

Any insight would be greatly appreciated as I am fairly new to the tuning side of the Subaru world.

Thanks
You have a single count of feedback knock near the area of peak boost - not something you want to see. It may be that the boost level is too high for your altitude. Or it may be poor gas quality in your area. First thing to try would be to reflash the 91ACN map (our most conservative map) and then give it a few more runs. If the feedback knock appears again, then you'll want to download the low wastegate (LWG) version of the 91ACN map (from the maps section at cobbtuning.com) and reflash that to the car. If you are using no-name brand of gas, you may want to consider going with one of the so-called "top tier" gas brands.

Bill
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Old 07-12-2012, 11:38 AM   #3
fightex
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Member#: 314063
Join Date: Mar 2012
Chapter/Region: W. Canada
Location: Calgary, Canada
Vehicle:
2012 STI Sport Tech
SWP

Default

Reflashed to Stage 1 ACN91 map and the feedback knock at peak boost is gone although there are two blips on the fine knock learn around 6100rpm.

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

94oct is readily available in my area so should I run the 94oct with the ACN91 map as added knock protection? Can I even venture to reflash to the non ACN91 stage 1 map with the 94oct and see if the knock issue returns?

Thanks again to Bill for all the help!

Last edited by fightex; 07-12-2012 at 11:38 AM. Reason: added link to google spreadsheet
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Old 07-12-2012, 12:24 PM   #4
Cobb Tuning
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Member#: 4803
Join Date: Mar 2001
Location: Austin, DFW, Portland, SOCAL
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Originally Posted by fightex View Post
Reflashed to Stage 1 ACN91 map and the feedback knock at peak boost is gone although there are two blips on the fine knock learn around 6100rpm.

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

94oct is readily available in my area so should I run the 94oct with the ACN91 map as added knock protection? Can I even venture to reflash to the non ACN91 stage 1 map with the 94oct and see if the knock issue returns?

Thanks again to Bill for all the help!
In this case, it appears the fine knock learning was learned right here during this run (sometimes you can get some fine knock learning noise from lifting off the throttle in previous WOT runs, but that is not the case here). I would reflash the low wastegate LWG map. I would also change gas brands. You can certainly put in 94 octane if you like. But, it wouldn't be worth it unless you plan to run it all the time. If you do, then you can experiment with going up to the 91 regular map and maybe the 93 map.

Bill
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