Very true. I usually leave early and get to the track before it opens the gates so usually the first run is cold as well. What was the differene in ET and MPH?
Between not and cold ? Just one run and the car ran better than I drove. (in other words my driving wasn't very good)
Posted here
These runs were all on 215/70r14 tires similar to BFG all season Radial T/A. By launching from idle and squeezing it on I've generally able to avoid spin if the launch pad is sticky.
edit. Do you mean from previous exhaust and timing curve to the current setup?
Almost a full second and approximately 5 mph.