Quote:
Originally Posted by digital_assassin
Someone correct me if I'm wrong but I believe the ECU will detect the better gas and advance the timing and in turn get more power but a specific tune isn't necessary. But I'm not certain so as I said, someone correct me if I'm wrong.
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The ecu never adds timing beyond what's in the base and advance maps. It may take less away, which would have the same effect, but ideally rthe car shouldn't be pulling timing in the first place. Guys on 91 are more likely to see knock correction even on a mild tune, though in which case better gas would 'add timing' depending on how you look at it.