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Old 07-28-2011, 11:06 PM   #1
dudenhoeffer02wrx
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Default feedback knock and fine knock learning??? please explain.

can someone just sum up what the difference is between fine knock learning and feedback knock? and waht are some average numbers i very rarely see any feedback. and am seeing 1.05deg under boost.
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Old 07-28-2011, 11:09 PM   #2
redline23
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http://www.romraider.com/forum/topic1840.html

TLDR: Feedback knock: A sensor just heard knock and pulled timing.

Fine knock learning: The ECU has learned it is seeing knock under that condition and pulls timing to prevent knock.
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Old 07-28-2011, 11:11 PM   #3
redline23
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Oops, double post.

I'll just add more information then :P http://www.romraider.com/forum/topic5371.html
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Old 07-28-2011, 11:55 PM   #4
dudenhoeffer02wrx
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thanks that is awsome.
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Old 06-21-2016, 01:06 AM   #5
Rob_STI_PNW
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Feedback, real time correction

Fine knock learn, proactive correction that prevented a knock event from ever occurring, think of it like it overdraft protection
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Old 06-21-2016, 10:38 AM   #6
ColdSoda
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since this is an accessport thread... I'll post this article, since it sounds like you might have some other questions too:

https://cobbtuning.zendesk.com/hc/en...How-to-Datalog

That does cover feedback knock, etc and other parameters.
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Old 06-21-2016, 12:10 PM   #7
wasatchwrx
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Whether the ECU decides to correct using feedback, fine knock learning or DAM adjustments is based on what mode it is in.

Taken from the badnoodle guide: FYI, IAM = DAM

If (in fine correction) {
If (pulled more than 4 degrees or the ECU is unhappy) {
Goto (IAM correction)
}
If (Large/rapid change in engine load) {
Goto (FBKC)
}
} else {
Check to see if any adjustments need to be made
Stay in FLKC correction mode
}
If (in FBKC mode) {
While (engine load is rapidly changing) {
Check for knock and pull timing if needed
When (Done) {
Go back to previous mode
}
}
}
If (in IAM correction) {
Find optimal IAM
Go back to FLKC mode
}
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