NASCAR will debut rules updates for this Sunday's race at Michigan International Speedway and use them again in the July 9 contest at Kentucky Speedway. The rules package developments are part of an industry-wide collaboration to further enhance the racing. Recently, welded truck trailing arms and new brake cooling rules were put into place. The following updates to the rules package will be added at Michigan and Kentucky to further reduce downforce and sideforce:
• Reduce skew generated sideforce by setting rear toe to zero (same rule used in the NASCAR Sprint All-Star Race)
• Aero package tweaks to reduce aero-generated downforce and sideforce
• Spoiler shortened from 3.5 inches to 2.5 inches
• Splitter reduced to 2 inches
• Resize of deck fin to match spoiler
The current rules package has generated some of the closest racing in years through the first 14 races of 2016. Highlights include three races setting track records for green flag passes for the lead, as well as two races featuring the seventh-closest margin of victory in NSCS history (since the advent of electronic scoring in 1993.)
From Jayski.
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