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Ignition timing inability to control after rev limit increased over stock
Posted: Tue Nov 23, 2021 9:40 am
by klarkin7
Hello! novice flash pro tuner here.
im dealing with an issue that, at RPM's above the stock rev limit timing seems to fall off dramatically. knock control remains constant, ignition limit doesnt seem to follow any editable table (as far as i can tell) and timing falls from 3* at 6600 rpm to around -2* at 7700. what am i missing here?
Re: Ignition timing inability to control after rev limit increased over stock
Posted: Tue Nov 23, 2021 9:43 am
by Hondata
What vehicle? Can you provide a calibration and datalog?
Re: Ignition timing inability to control after rev limit increased over stock
Posted: Tue Nov 23, 2021 11:37 am
by klarkin7
2017 civic si! im sure there are many issues with this map, i started making changes looking for a smoking gun that i never found before we had a trans failure.
Re: Ignition timing inability to control after rev limit increased over stock
Posted: Wed Nov 24, 2021 9:39 am
by Hondata
I suggest disabling all live tuning and retesting.
Also test changing the last row of the knock sensitivity.
Re: Ignition timing inability to control after rev limit increased over stock
Posted: Wed Nov 24, 2021 2:27 pm
by klarkin7
unfortunately increasing knock sensitivity values in all cylinders made no difference.
Re: Ignition timing inability to control after rev limit increased over stock
Posted: Thu Nov 25, 2021 10:03 am
by Hondata
OK, I'll pass this along for further testing here.
Re: Ignition timing inability to control after rev limit increased over stock
Posted: Mon Nov 29, 2021 8:52 am
by klarkin7
My limited experience has shown me that generally if you exceed the limit of a given x or y of a table it will revert to the last cell it was in, however is there a chance that once it is above the max of the RPM axis it no longer follows the knock sensitivity command? meaning i should change the index of the RPM axis. i know generally you would leave it alone however im sort of stuck in a rut here.