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Personally, I think quantifying small improvements at the track is difficult at best. Just an hour between runs can cause DA, ambient air temp, track conditions, eng temps, to change your Et by a tenth. Thats where dyno testing shines. If I am looking for small improvements at the track, I rely on the MPH numbers before the ET #'s.



This is true for me and my car. Although I track and record considerable information, I'm just not consistant enough. I always use a weather station, and repeat the change to confirm. I would say that half the time I cannot repeat the improvement that I thought I found.