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Engines

2026 NASCAR Rules

Darlington Didn’t Match the Hype. What Does Higher Horsepower Mean for Martinsville?

2026-03-26 dr. diandra 0

As we approach a higher-horsepower Martinsville, let’s reflect on last week’s Darlington race. NASCAR, drivers, and the media made some bold predictions about how the race might turn out. […]

Engines

Fuel Mileage Calculations: The People Who Know Aren’t Telling

2025-09-19 dr. diandra 0

Fuel mileage races have always been part of NASCAR, but increased access to data is giving fans new insights into the competition to reach the checkered flag. More than once this year, fans have perched on the edges of their seats during the last few laps of a race, listening to a crew chief tersely instruct his driver to ‘save fuel’. […]

Mufflers

Dr. Diandra’s FAQ on Muffling NASCAR Racecars

2024-02-03 dr. diandra 0

In anticipation of the upcoming Busch Light Clash at the Coliseum, here is Dr. Diandra’s FAQ on muffling NASCAR racecars. […]

Aerodynamics

Explainer: Engine and Aero Packages 2019-2021

2021-09-22 dr. diandra 0

Mix-and-match engine and aero packages were used from 2019-2021. Here’s what each one was and where it was used. […]

Engines

Why NASCAR Engines are Not Spec Engines

2021-07-23 dr. diandra 1

NASCAR mandates a 750-hp package and a 550-hp package. That’s led a lot of people to suggest that this is really no better than a spec engine. Here’s why that’s far from true. […]

Cooling

Does Qualifying Matter at Talladega?

2019-10-11 dr. diandra 5

50% of races won at Talladega are won by drivers starting from the first two rows. Can you win if you don’t qualify well? […]

Header with a quantum corral, Keselowski at the KAM launch, and a 3d-printed prosthetic leg
Aerodynamics

Brad Keselowski: The Smartest Driver in NASCAR

2019-03-15 dr. diandra 1

Brad Keselowski may not have an engineering degree or years and years of experience, but I’m ready to nominate him as the Smartest Driver in NASCAR. He is a man with a plan and it’s […]

Montage of speed-related pictures
Aerodynamic Forces

Will You Be Able to Tell if NASCAR Cars are Slower in 2019?

2019-02-08 dr. diandra 1

When is the answer to better racing slower cars? It just might be for NASCAR. Note: This post analyzes the change in speed due to the new rules package. Please don’t interpret it as my […]

Aerodynamics

The 2019 Rules Package: The Tapered Spacer

2018-10-12 dr. diandra 2

NASCAR announced the 2019 rules package last week. Reactions from fans ranged from wait-and-see to despair to a surprising amount of anger. […]

Climate Change

In-Car Fire Suppression Systems

2018-06-01 dr. diandra 4

NASCAR has made significant advances in protecting drivers from crashes, but fire is more of a challenge. Let’s take a look at how fire suppression systems have evolved. A Brief History of Fire Suppression Systems […]

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