Thinking about it, that makes a lot of sense. Of course running too lean will make the motor run hot, but also, my '60 ft. times have been not what I was expecting, and my mph has been around 142....less than I would expect with the car weighing in at 2500# with me in it, and the hp anywhere near what the dyno said. What really kind of through me off that trail, is that early in the year, I moved up to bigger jets, and my mph dropped. But that was before I had the timing dialed in, so I'm sure you're right about this. Thank God for fellow Vega owners.