Quote:
Originally Posted by MassNerd
Looks like you lost some top speed. The slope of acceleration on the straights is clearly slower than with the 245/265 setup. Possible due to the extra drag of the tires, or was there some other factor that day?
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Yup, good catch. I think it's a combination of a few things:
- strong winds that day. You can see it's mostly happening on just two of the full throttle sections -- looking at the track layout these straights are both in the same direction. The main straight (end of the lap) points the opposite way and it's not a problem there.
- warmer day -- higher IAT.
- some other mystery "engine's down on power".
I only mention the last one -- which is the oldest excuse in the book -- because it's shown up a couple of times soon after this, when there wasn't any apparent difference in conditions. Still looking for the root cause.