Cautions
2024 Iowa Race Report
The 2024 Iowa race report has some edgy tires, a disaster for both Kyles and the first win of the season for defending champion Ryan Blaney. So let’s get to it! Caution- and Lead-O-Gram We […]
Tracks
Chase Elliott
2024 Darlington I Race Report
The 2024 Darlington race report is a great example of how numbers never tell the entire story of a race. We’ve got side-by-side racing but not a lot of official lead changes, and bold moves, some of which worked and some of which didn’t. […]
Kansas
2024 Kansas I Race Report
Hello and welcome to the 2024 Kansas I Race Report. Things have been going slowly here at BuildingSpeed because of a total re-org of the data system. That meant I had to re-write a ton of programs. Expect this report to grow as more of the plots get re-written. […]
Aerodynamics
2024 Spring Martinsville Lead Change Preview
The 2024 spring Martinsville lead change preview shows lead-change variations throughout the last three generations of the NASCAR race car. This information provides necessary perspective for understanding this week’s race results. […]
Phoenix International Raceway
Phoenix Short-Track-Package Testing: Day 1
The Phoenix short-track-package testing: Day 1 comes to you after a long day of tire testing and mock races — which produced some pretty optimistic drivers and engineers. What Was Tested NASCAR asked teams to […]
Martinsville Speedway
2023 Fall Martinsville Race Report
The 2023 fall Martinsville race report features an astoundingly high fraction of green-flag passes, a new tire that worked for racing, but not for the pace car and some costly pit-road snafus. […]
Christopher Bell
2023 Fall Las Vegas Lead Change Review
The 2023 fall Las Vegas lead change review has 9 green-flag passes and an epic battle between Kyle Larson and Christopher Bell. […]
Indianapolis Motor Speedway
Michael McDowell Wins at the Indianapolis Road Course
Michael McDowell guaranteed his spot in the playoffs with a dominant performance at the Indianapolis road course. He led the most laps in a race that he’s ever led in his career, especially meaningful when […]
Indianapolis Motor Speedway
Indy Restart Zone Moved in Attempt to Prevent Chaos in Turn One
NASCAR moved the restart zone at the Indianapolis Motor Speedway’s road course from just before the start-finish line to between turns 13 and 14. They hope that lengthening the distance between the restart zone and the tight Turn 1 right hander will decrease the chaos that has become a track signature. […]
Chris Buescher
2023 Richmond July Race Report
The 2023 Richmond July Race Report has five green-flag passes out of the 18 lead changes, drivers taking themselves out with mistakes, and only one natural caution. […]