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Originally Posted by BAN SUVS
93 won't really do anything for you without a 93 high-altitude map. You're not knocking on the 91 map presumably, so no need for higher octane until you get the Street Tuner. Then you can give a tiny bump in boost and play with fueling a bit and spark a lot.
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No, I was thinking of runnnig the 93 octane map in place of the 91 map I am running even though we only have 91 octane up here. I thought better of it, but my initial thinking was that the higher altitude more than compensated for the lack of octane.
What I don't know is if the ECU reads absolute or relative pressure. Heck, I'm not sure what my gauge does.
If I am boosting to 15-16 PSI absolute, then I definitely don't want the 93 map.
But if I am boosting to 15PSI relative, then the 93 map might be OK.