Durametric pulls data before and after UDP

[pharaohjb]

+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.

[steved0x]

Good points, I did get lucky to find a day with approximately the same outside air temp but who knows what the rest of the variables were like. I never even thought of those. I was just happy that the temp changed and it was 70 that second day.

I never thought about wind resistance at higher speeds before either but that makes sense too. I can definitely feel the wind resistance when I am driving my Toyota FJ Cruiser and I go to pass somebody on the interstate...

I know I can definitely feel it in the "butt dyno", but even on the runs where the "After UDP" was faster it is by fractions of a second... I can't imagine trying to "poor man dyno" a de-snorkel operation. (For the record I still have my snorkel)

Thanks

Steve