It as worked well for us on the rear tires, 111" rollout so big ones. We use tires pressure as a last minute adjustment to the track. When it starts to get slick/sketchy we will ad as much as a pound of air to the rear. Do the same thing on the heads up car to adjust for the starting line, just different with a small tire vs a big tire.
"I am not ashamed to confess I am ignorant of what I do not know."