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06-14-2022, 01:23 PM | #1 |
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Normal knock correction and final multiplier
Hello everyone,i tried to search around and found nothing that could help me. i have a Turbo’d FRS on E85.
when it comes to Advance Multiplier and Knock Correction, what are the values that you should be worried? I know 1.0 for AM and 0 degrees knock correction is ideal. But does that mean i should worry if they dont stay there? I noticed that when i go about half throttle i start to get a couple degrees of Knock Correction in the low/mid RPMs. If i cruise at a somewhat constant speed for a while, AM starts to drop down to the .70’s.Not sure if i should worry, car feels perfectly fine to me. Thanks in advance |
06-14-2022, 06:06 PM | #2 |
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Im no tuning expert, but it sounds like the tune is expecting full E85 and getting E60-70. Knock is never good. I advise bringing it to a tuner and backing it off a bit.
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06-14-2022, 06:30 PM | #3 |
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Advance multiplier changing is concerning. Datalog and submit it here, you can upload to datazap.me
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06-14-2022, 07:17 PM | #4 |
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I have a flex fuel kit so it should be correcting it right? Im currently sitting at 80%. Sorry i should have clarified that.
Should i send a cruising log? Or a stop and go log? |
06-15-2022, 03:55 AM | #5 |
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knock at cruise especially in high gears is common issue. A lot of tuners dont check the tunes on highway just on dyno so it gets missed.
can be fixed knock correction or flkc of -1 or less is fine , especialky if advance multiplier stays at 1. The occasional drop to 0.9 is ok but if its considpstently dropping to 0?7 or below probably worth looking at adjusting tune |
06-15-2022, 03:13 PM | #6 | |
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Quote:
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06-15-2022, 05:45 PM | #7 | |
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Quote:
Can be combination of all three to little fuel too uch tiing too little fuel on throttle transients ues high load in high gears tends to cause knock |
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06-17-2022, 03:51 PM | #8 |
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Update, it appears that my overpipe hitting the subframe was triggering the knock sensor. Advance multiplier has been at 1.00 for a couple of days vs before i simple drive to work (about 20 minutes) would make it drop.
There is still a few degrees of knock correction on partial throttle acceleration. My question is what should i be monitoring? Knock correction or ignition correction? Also what is FLKC and IAM? |
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06-18-2022, 07:11 AM | #9 |
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both of them
flkc = ignition correction ap fine knock correction = ign correction ak knock both are relevant AM = advance multiplier IAM = initial advance multiplier, meanign the advance multiplier as set for right after startup, in oem tunes is set at 0.7 for example |
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