ET can be much more all over than MPH. For instance, my Duster with the open rear end could break the one tire loose. I could let off, let it bite, then mash it again and the ET might be a half second off but the MPH would be about identical. That's why i like MPH. Also, a car like a stock eliminator will shoot like a rocket out of the hole, but their MPH will usually be a little slow for the ET (at least in most cases I've seen). It's why I like ET. But I'll be honest, I'm already bored of this topic as it pertains to nothing I am doing with my cars. It was just a message to those sending me dyno videos LOL