I made a choice to go the other way this year. I have a shorter tire (315/30/18), and I went from a 3.89 to a 3.64. I liked the drop of RPM for the highway driving, but move significantly, it gave me more RPM range in 1st and 2nd gear during my autocross driving.
2565 seems high for a highway target. I was around that before, and I dropped to 2250-2350 now, and that seems better...
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