That’s Skewed Up! Why Next Gen NASCAR Racers Are Dog-Tracking In Practice

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That’s Skewed Up! Why Next Gen NASCAR Racers Are Dog-Tracking In Practice

The upcoming chassis for the Next Gen cars of the 2022 NASCAR Cup series, which kicks off February 20, 2022 with the Daytona 500, is a drastic, clean sheet design over the outgoing cars. But no one just uses the modular car as it comes out of the box—and teams are wasting no time in tweakin’ the new cars, as evidenced by the way some of the Next Gen cars aren’t exactly tracking straight on the straightaways. Um, what?

Case in point: Check out the extreme dog tracking of the number 43 Petty-GMS Focus Factor Chevrolet driven by Erik Jones, as observed on Twitter during the NASCAR Next Gen Test at Daytona International Speedway on January 12, 2022. How and why are the cars doing this? Let’s find out.

While there were many evolutions, the chassis for the old car was based partially on 1950s/1960s technology. The rear suspension utilized a “truck arm” design attached to the solid rear axle (based on the Ford 9-inch axle). The springs were placed between the arm and the chassis, just in front of the axle tube, similar to an SN95 Mustang, but the truck arms attached to the rear axle directly with no pivot point on the axle.

The front suspension was based off of the GM truck design and closely resembled the “Metric” suspension of the S-10, except the shock (damper) was located on the arm instead of going through the spring. It also featured Saginaw-style steering with a steering box, pitman arm, a tie bar, and toe links. Again, old truck stuff.

For the full story, check out this article from Motor Trend.

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