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Old 01-26-2017, 05:23 PM   #1
Scooby Newbie
Member#: 319912
Join Date: May 2012
Chapter/Region: NWIC
2012 STi Hatch
Plasma Blue Pearl

Default Help me analyze my RomRaider logs

Hi all,

I am on day 1 with my Stage 2+ kit and e-tune being completed. My tuner (who will remain anonymous for now) gave the thumbs up after 5 revisions but I'm hoping I can get a second/third opinion from some seasoned pros on the attached MAF Scaling and WOT logs.

WOT logs were performed using RomRaider Logger in 4th gear 2.5-6.5k RPM on a relatively flat straightaway.

Links are to the RomRaider forums:

MAF Scaling #1
MAF Scaling #2
WOT #1
WOT #2

Current MAP (Rev5)

These logs are without WB02... I haven't got the serial>USB cable wired in yet.

Also I did my homework before asking by including the questions from the 'How To: Read Data Logs" Guide with my answers below.

1: 6 total knock events. 3 FBKC and 2 FLKC during MAF Scaling log but only 1 occurrence of FBKC during WOT log.
2: At least one knock event in every log. The FLKC [email protected] happened in both MAF Scaling logs so it was obviously pre-learned.
3: AFR is rarely 14.7 and often is much higher (20 in some cases). I assume this is from sudden throttle cut (accel>braking, etc.) but not sure.
4: Anything you notice from these logs I should tell my tuner about?

Thanks in advance for any guidance you can provide!!


- 2012 STi wagon @ 50450 miles
- 92RON fuel @ ~1/2 tank
- 40-45' temps @ 200 ft sea level (Seattle)
- Partly cloudy weather

Stage 2 setup:

1- AEM 21-478WR CAI with heat shield (DEI wrapped)
2- Grimmspeed 3-port EBCS
3- Stock turbo with turbo blanket/nameless heat shield
4- IAP fuel stumble kit [iA-GR-F-V3]
5- Nameless Performance full TBE 3" catted & divorced wastegate w/5" mufflers
6- DC Power 275A Alternator
7- Die Hard Platinum GS35 850CCA w/PulseTech PPL-12L
8- 0 gauge grounding kit and 'Big 3' upgrade

Q&A from 'How to Read Data Logs' thread

* Is the engine knocking at all? Yes > 3 FBKC and 2 FLKC during MAF Scaling log, 1 occurrence of FBKC during WOT log.
* If so, then at what RPM and load did each of the knock events happen?

- MAF Scaling: FBKC [email protected], [email protected], [email protected], FLKC [email protected] X2 (learned apparently since it's in both logs)
- WOT: FBKC [email protected], FLKC = none
- IAM @1.0 across all logs

* What was the AFR when the knock happened?

AFR = Correction%/Learning%/Sensor (AFR)

MAF Scaling:
FBKC = -.7 @ 2652rpm AFR= 3.12 / 0.78 / 14.59
FBKC = -1.4 @1579 AFR= -6.25 / -0.78 / 13.09
FBKC = [email protected] AFR= -4.69 / -0.78 / 12.52
FLKC = [email protected] AFR = 0.78 / 0 / 14.36

FBKC = [email protected] AFR = 0 / 0 / 11.14

* What was the throttle doing when the knock happened?

Knock occurrence / throttle angle
FBKC = -.7 @ 2652rpm = 21.57% throttle
FBKC = -1.4 @1579 = 18.04% throttle
FBKC = [email protected] = 17.65% throttle
FLKC = [email protected] = 24.31% throttle

FBKC = [email protected] AFR = 100% throttle

* What's the highest MAF reading, and at what RPM? 288.8 @ 6324rpm
* What's the highest load reading, and at what RPM? 3.4 @ 3086rpm

* Does the log show the AFR from the stock sensor, or an aftermarket wideband? Currently stock sensor, UEGO to be installed in a few days.
* What's the load when the AFR starts to drop from 14.7? It seems to be all over the place....
* Does the AFR level out after that drop? Yes
* What's the AFR when it levels out? 11.14
* Is it leveling out because of the stock sensor? Possibly?

* What's the peak boost, and at what RPM does it happen?

- WOT #1: 19.99psi from 2854 to 4400 RPM
- WOT #2: 19.99psi from 2813 to 4345 RPM
* What's the boost at redline? ~16.5psi
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Last edited by mulagain; 01-30-2017 at 11:45 PM.
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Old 01-30-2017, 11:46 PM   #2
Scooby Newbie
Member#: 319912
Join Date: May 2012
Chapter/Region: NWIC
2012 STi Hatch
Plasma Blue Pearl



I posted the same thing over on RomRaider and this was the feedback I got but I don't know enough about maps yet to make an educated decision. Based on the attached MAP would you agree or disagree?

"there seem to be a few things wrong with this map.. You should go back to your ETUNER guy/gal and get them to fix it...

From what i see the INtake/Exhaust AVCS are kinda not setup right. All your CL/OL are not setup correctly... I would start with these tables first....

The timing that it runs and im guessing the AFR look correct. but since you arent logging OL/CL i cant be sure your stuck in CL... its just my guess from the rom having a 750 count delay and a 313 delay..."
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