2024 NASCAR Rules
NASCAR Changes Crew Glove Rules
Crew glove-rule changes are the most significant of the rules changes provided to the press on March 13th. That change formalizes and narrows NASCAR’s start-of-the-season crackdown. […]
The Building Speed Blog
Aerodynamics
Joey Logano’s Gloves
Joey Logano’s gloves not only got him sent to the back of the field for the Ambetter Health 400 race at Atlanta Motor Speedway, they also earned him a pass-through penalty. And there’s probably more to come. […]
Acceleration
NASCAR Crashes and G-Forces
While NASCAR keeps crash details confidential to protect drivers’ privacy, some drivers share the numbers from their crashes. But a single number doesn’t tell you everything about crash in the same way that finishing position doesn’t tell you the story of a driver’s entire race. […]
Mufflers
Dr. Diandra’s FAQ on Muffling NASCAR Racecars
In anticipation of the upcoming Busch Light Clash at the Coliseum, here is Dr. Diandra’s FAQ on muffling NASCAR racecars. […]
2023
2023 NASCAR by the Numbers
Your 2023 NASCAR by the Numbers post is finally here! Find out who had the most accidents, the most penalties, and the best finishes. […]
Short-Track-Package Testing at Phoenix
Six NASCAR drivers participated in short-track-package testing at Phoenix Raceway on December 5th and 6th. They tested variations in tires, and an alternate splitter and diffuser. NASCAR’s goal for this test was learning how to improve racing at tracks a mile and less. […]
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 […]
2023
2023 Stats Overview: Penalty Numbers
The 2023 Stats Overview: Penalty Numbers summarizes the overall number and types of penalties incurred in NASCAR’s 2023 season. Teams generated a total of 741 total penalties, but not all were accidental. Last year, I […]
2023
2023 Stats Overview: Days Raced
The first entry in the 2023 Stats Overview is Days Raced, which surveys the days races started. Note that races delayed a day by weather aren’t included here. Also, I only include points races in this survey. […]
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. […]