Quote:
Originally Posted by merritt
The ECU won't adjust to any higher octane without being reprogrammed to do so. Using higher octance fuel requires a specific tune to utilise it. If your tune was programmed for pump gas then it won't take advantage of the benefits of higher octane fuel. It allows for high boost and more advanced timing without detonation. The engine will only build boost to the level the Procede tune wants it to and thus it will only add the necessary fuel for such boost levels. The ECU will pull out boost and timing if it detects problems, like a lot of activity detected by the knock sensor, but it will not advance timing or boost beyond their original programmed levels.
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The big secret is the procede actually induces knock retard, so by increasing octane the knock retard is reduced, and the engine makes more power.