Every car I have owned, the speedo is off when accelerating hard.
My Lightning says I am going 105 mph when I go thru the 1/4 traps...yet it runs 110-111
My Z28 would say 108 mph...yet run 115-116.
Most cars hook better on the track than the street. I have owned several G-techs and used them on numerous cars...a step above a stopwatch imo.
