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Every tune take advantage of octane margin left by stock tune, to some degree. As you don't have much of it and apparently have to increase octane for the tune, which in my opinion only make sense for drag racing or track event. I would suggest you stop trying to mix up fuel which can have inconsistent octane, to find the answer you already know. That's a waste of time, gas (money) and mileage (money). Just pay 300 for custom tuning to your octane and you'll be good.
Yes, you'll be 20~30whp down from those 93OCT OTS guys. But everyone has a reality to deal with. Some guys sport a huracan and give no sh*t about 50~60ps more or less. And some guy try stuff a bigger turbo onto N20 hoping to break 330whp, which is M2 stock. The rest almost forget the power rating from factory.
Be easy man!
BTW yes, the gas this time is a little better, not by much though. Tune to the gas that you have easy access to would be my recommendation.
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Lemania 2320
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