Highest Octane For Stock ECU??

Hi-TecDesigns

To answer the earlier question about the ECU advancing timing...

Using a semi-closed loop system, The ECU will retard timing as knock appears, and it will advance timing back as knock disappears, slowly but surely until either knock appears or it is back to the default timing. The key here is once the ECU has advanced back to the default value, it will not advance any farther. If there is zero knock on 93 on a sunny day, you are getting the best performance out of the engine possible, and placing a higher octane will not increase power (not getting into the oxygenated argument here). Don't make the mistake that the ECU will continue to advance timing beyond the default until it starts to knock, always giving you the most power possible for each tank of gas... it doesn't work that way.

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