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Originally Posted by Musclerodz
I am no expert but I can't see only changing fuel spec would make 700hp more. No doubt by changing fuel they can change mixture curves and timing curves and gain a bunch but I clearly can't see or understand that much of a change unless the boost knob was turned up with the 109 and down on the 91. Please inform this young grasshopper.
Mike
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You got it. High octane = more detonation resistance, which means you can run more boost, put in more fuel to go with the additional air, and more timing... and that means more power. Lots more power.