Aerodynamics
The 2019 Rules Package: The Tapered Spacer
NASCAR announced the 2019 rules package last week. Reactions from fans ranged from wait-and-see to despair to a surprising amount of anger. […]
restrictor plates
Graphs and Charts
2018 XFINITY Daytona Qualifying
A fast one-graph summary of data for the XFINITY qualifying stats. Up to 36th position, qualifying times are roughly linear with a slope of 0.056 seconds per position. 1st to 2nd: 0.083 seconds 1st to […]
Computational Fluid Dynamics
Engine Rules Changes for 2015
There’s a lot of talk about all the rules changes for 2015. The limiting of the horsepower has been a hot topic of discussion, with people suggesting that NASCAR is basically mandating spec engines. Â Here’s […]
Engines
Eliminating Restrictor Plates?
Every return to a restrictor plate track brings suggestions about how we might eliminate the restrictor plate. Restrictor plates serve the very necessary function of limiting car speeds at Daytona and Talladega so that the cars stay on the ground. The negative is that they remove throttle response. One suggestion from some readers that I hadn’t heard of before suggested that NASCAR could just change the rear-end gearing parameters to shift the power curve and reduce horsepower that way. Will that work? […]