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Old 06-30-2013, 08:04 PM   #1
SaskSuby
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Member#: 243362
Join Date: Apr 2010
Chapter/Region: W. Canada
Location: Regina, Sask
Vehicle:
2004 Impreza WRX
PSM

Default First Log. Fine Knock Feedback

2004 Wrx with 107,000km.

Turboback exhaust

Previous owner told me he had an "off the shelf map" flashed. Would like to look into a more specific tune for my car.

First Log

Second Log

Edit: Oh, I'm also wondering what kind of maps are erased when the battery is unplugged. I've had my battery unplugged a couple times while doing some work on my car.
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Old 06-30-2013, 09:20 PM   #2
mikeydrives1
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Member#: 262117
Join Date: Oct 2010
Chapter/Region: Tri-State
Vehicle:
2001 Forester
STi II type M

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Well, reseting the ECU will reset the learned Knock (fine knock) and all your learning values (A, B, C, D) as well as the general idling of the car.

Yeah, that feedback knock is not learned stuff, thats happening in realtime. Its pulling timing due to it (-2.11 degrees) . Think of it as a safety feature of these cars. It will reduce timing until it sees the knock event go away. If knock doesnt go away, it will then resort to reducing the IAM / DAM value to reduce timing globally.

Looking at the logs, it seems pretty consistent from about 5800+ for both pulls. I dont see any timing logged on there, but if i had to guess, it may have to be trimmed back a little. The boost looks relatively stable and tapers off, not being too far from its desired target.

What kind of local weather conditions are occuring during these pulls? Keep in mind, hot weather has a tendency to heatsoak our Top-mounts, and if you go to do a pull after sitting, even just for a little, its possible to generate a little knock from the excess heat.
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Old 06-30-2013, 09:53 PM   #3
SaskSuby
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Join Date: Apr 2010
Chapter/Region: W. Canada
Location: Regina, Sask
Vehicle:
2004 Impreza WRX
PSM

Default

Yeah, it was around 30 degrees Celsius. Car was sitting for about 3 hours. Drove around for 10 minutes and did two pulls.
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Old 06-30-2013, 10:10 PM   #4
mikeydrives1
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STi II type M

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Quote:
Originally Posted by SaskSuby View Post
Yeah, it was around 30 degrees Celsius. Car was sitting for about 3 hours. Drove around for 10 minutes and did two pulls.
well, 30 * C is fairly warm if my conversion to degrees F isnt too rusty. Heres the thing though, once you get a few moments of airflow through the intercooler, its nearly back down to normal temps. Hot weather in general can be the cause of knock. This is something that has to be addressed by a tuner generally by adding a little more fuel in the affected areas, as well as reducing boost and/or timing as well, and seeing if that alleviates the knocking.

Next question. What octane fuel is available out there?
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Old 06-30-2013, 10:13 PM   #5
nmlittlebigman
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Location: Arrey, NM
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2015 WRX LTD
WRB

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You might be maxing out your injectors. Add injector duty cycle to your logged parameters. You might also consider getting a wideband to check your AFR's.
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Old 06-30-2013, 10:24 PM   #6
SaskSuby
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Join Date: Apr 2010
Chapter/Region: W. Canada
Location: Regina, Sask
Vehicle:
2004 Impreza WRX
PSM

Default

Quote:
Originally Posted by mikeydrives1 View Post

well, 30 * C is fairly warm if my conversion to degrees F isnt too rusty. Heres the thing though, once you get a few moments of airflow through the intercooler, its nearly back down to normal temps. Hot weather in general can be the cause of knock. This is something that has to be addressed by a tuner generally by adding a little more fuel in the affected areas, as well as reducing boost and/or timing as well, and seeing if that alleviates the knocking.

Next question. What octane fuel is available out there?
Octane that is available is 94,92,91
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Old 07-03-2013, 11:59 PM   #7
SaskSuby
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Member#: 243362
Join Date: Apr 2010
Chapter/Region: W. Canada
Location: Regina, Sask
Vehicle:
2004 Impreza WRX
PSM

Default

Did a few more logs today. Was way cooler.

Log 3

Log 4

Log 5
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Old 07-05-2013, 09:14 PM   #8
Speedy Claxton
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Location: 'Murica
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07 stage 2 STi
ewg & Phatron tuned

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you have something going on. Your FLKC is .35 through all the pulls and your IAM is at 15 now.
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Old 07-06-2013, 10:23 AM   #9
nmlittlebigman
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2015 WRX LTD
WRB

Default

Your wastegate duty cycle immediately goes to 100% and stays there. Find a tuner.
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Old 07-07-2013, 12:34 AM   #10
SaskSuby
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Member#: 243362
Join Date: Apr 2010
Chapter/Region: W. Canada
Location: Regina, Sask
Vehicle:
2004 Impreza WRX
PSM

Default

Getting dux10 to look at it/tune
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