Quote:
Originally Posted by BLM
If adding headers caused the AFR to run so lean that this happened it seems like the original tune was $hit anyway.
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Most ECU's are in open loop at WOT, so there aren't any fuel trims to tweak the tune towards a target AFR.
That said, even if the Z ECU can maintain a target AFR at WOT, under load the change may have happend so fast that the ECU couldn't compensate in time (or pull timing fast enough if it detected knock) so boom.
Can anything out there get a readout from the OEM knock sensor? I know uprev can't.
I suppose folks could try a J&S safeguard.