+1 on the headwind idea. While your "S" certainly has more grunt than my '99, I've noted a significant difference at the end of the main straight at BIR with a headwind v. tailwind. I can routinely hit 130 mph going into Turn 1 there with a tailwind, but *struggle* to hit 120 with any sort of headwind. Further, it feels like a struggle down the entire straight with a headwind, too.
The headwind idea would also explain why it would show up at the faster speeds (higher gear measurements), too, and not the slower speeds. Drag has a much larger effect at the higher speeds.
Last edited by pharaohjb; 03-09-2015 at 12:11 PM.
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