GRJ,
Yeah - if I had a timing strobe I would have used it be able to watch the driver wheels to see if I could detect any change in the rotational speed of the wheel. but I don't have anything on hand to make more precise observations. With just my eyes, I could not perceive any change. As I told the MTH Tech in my e-mail, a tach misread could be causing the missed chuff, and momentum obscuring the speed variance.