Heatsoak. As my general rule of thumb goes, you first run will be the quickest, and have the best terminal speed. I have gone against this once, when I was learning how to drive the ute at the strip, bad launches and wheelspin aside of course.. . And yes, trap speed is the average speed between 2 light beams at the end of the track, so keep on the gas for a sec or 2 after the line.. ← Certainly looks like heat soak I did three runs 1st...60'- 2.345 1/4-13.095 MPH-114.72 2nd...60'-2.336 1/4-13.094 MPH-113.72 3rd...60'-2.404 1/4-13.143 MPH-114.44 Between 1st and 2nd runs was a gap of 1/2 an hour I done the 3rd run straight after the 2nd. No wheel spin on any of the runs.