Fourteen cars, each from a different Monster Energy NASCAR Cup Series team, began to break in the 2019 rules package during an open test Thursday at Las Vegas Motor Speedway.
Teams were shaking down the full 2019 rules package for the first time at the 1.5-mile track, using aerodynamic ducts and a tapered spacer designed to reduce engine horsepower to a target of 550.
Live-streamed on NASCAR.com and NASCAR’s YouTube and Twitter handles, the initial 25-lap drafting practice three hours into the day yielded the most insights early into this two-day session.
NASCAR Executive Vice President and Chief Racing Development Officer Steve O’Donnell and NASCAR Vice President of Innovation and Racing Development John Probst both were in Las Vegas to watch the action unfold and chat with race teams.
“This is a journey,” Probst told NASCAR Digital’s Jessica Ruffin from the track. “We started a few years ago trying to bring more entertaining and competitive racing to our sport. This was the first time we got to see 14 cars go out there and run 25 laps. So far, so good.”