IMSA articles, project cars, conversations, and more on Grassroots Motorsports


50 Years of IMSA: Now Showing Vintage Races!

To celebrate their 50th anniversary season, IMSA is uploading vintage races to their YouTube channel!

Join Us at Petit Le Mans This Weekend

End the IMSA season in style with us!

IMSA Announces John Doonan as Their Next President

He takes over on January 1, 2020, but his first day on the job is October 21.

Welcome Race Fans: Grassroots Motorsports Welcomes Another Sell-Out Crowd

The 2020 Rolex 24 At Daytona: sun, smiles and speedy cars.

IMSA Sebring SuperSaturday Goes Digital

While the IMSA Sebring SuperSaturday has been postponed until later this year, many drivers are still going to be racing this weekend thanks to iRacing.

Big Kids and Little Kids, Color Your Favorite IMSA Cars

Run out of things to do after a carpet car show? How about coloring the No. 63 WeatherTech Scuderia Corsa Ferrari 488 GT3 courtesy of IMSA?

Virtual IMSA Races Every Other Week

Need more professional iRacing in your life? IMSA has you covered with the biweekly IMSA iRacing Pro Series.

Watch IMSA iRacing at Mid-Ohio Tonight

Set your clocks, round three of the IMSA iRacing Pro Series at Mid-Ohio Raceway will happen tonight at 6 p.m., presented by Hagerty.

IMSA Unveils Revised 2020 Schedule

Both the WetherTech SportsCar Championship and the Michelin Pilot Challenge are returning.

Porsche Leaving IMSA GTLM at End of 2020

Porsche announced that they plan to exit the GTLM class of the North American IMSA WeatherTech SportsCar Championship at the end of 2020.

IMSA WeatherTech 240 At Daytona to Allow Limited Spectators

A limited number of spectators will be allowed at the IMSA WeatherTech 240 At Daytona, but there's a catch.

Cadillac Dominates Cadillac Grand Prix at Sebring

How appropriate is it that Cadillac dominated the Cadillac Grand Prix of Sebring with a one-two-three finish?

Acura and Penske to Cut Ties After 2020 IMSA Season

After three successful years in racing, Acura Motorsports and Team Penske have come to a "mutual agreement" to end their partnership at the end of this year's IMSA season.

Andy Lally on NASCAR vs. Sports Cars: "Barely Anything Transfers Except the Need to be Aggressive"

Five-time Daytona Rolex winner Andy Lally on sports cars versus NASCAR Cup cars.

Roar Before the Rolex 24 to Immediately Precede the Daytona Race Itself

New date for the Roar Before the Rolex 24: the weekend immediately preceding the race itself.

Bill Auberlen: Talking About Breaking a Big, Big IMSA Record

Bill Auberlen now has 61 IMSA race wins, a sanctioning body record. We recently chatted about that feat.

IMSA and SCCA To Work Together To Build Next Generation of Motorsport Professionals

Both IMSA and SCCA have just announced a partnership in order to provide a clear path for the next generation of professional drivers, workers and crews.

IMSA To Sanction 2021 Global MX-5 Cup Series

After some “careful evaluation,” Mazda has chosen IMSA to be the sanctioning body for the 2021 Global Mazda MX-5 Cup Series.

IMSA articles

Columns: Socially Distant Racing: Heading to Daytona as Florida’s Covid Numbers Hit a New Record

On the same day that Florida recorded a high score for new positive Covid cases–nearly 11,500 added to the tally for just July 4, enough to almost tie New York’s peak–we headed to Daytona International Speedway for the IMSA WeatherTech 240.

Features: Starting Line: “IMSA: An Intertwined History”

We give our thoughts on Mitch Bishop and Mark Raffauf's new book, which details IMSA from `69-`89. During this drug-fueled era, dirty money flowed like race gas around the pits at events in Miami and Palm Beach.

Columns: Column: The Greener Future of Motorsports

Making racing better for the environment isn't easy, but we've already taken steps in the right direction.

IMSA Forum Topics

IMSA at Lime Rock Park 2019
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