416 running slower than expected

Leadfoot said
Just checked. You're up at 5300 feet in altitude. That makes a lot of difference. Knock 3/4 of a second off your time at sea level. Maybe even more. Then throw in the density due to the heat down there. That'll knock off a little too.

Right there with Denver....could not find listing for your track in mexico to compare weather...but using Denver drag strip...

your 12.24 converts to a 10.95 at sea level....at standard air and baro...