. Exactly as the last 2 posts wrote. If the dampness moves in, you may have an extra revolution or 2, and your 60' is off, but MPH is fine. Even with the cooler charge, and extra HP, ET will still go up. If the 60 is the same or higher AND mph is off, then you lost HP, and with the cooler charge your tune up is choking you down. Or 100 other things just could of happened, and you won't know until next race??? .