2017 NASCAR rules package to be used once again at Michigan
NASCAR announced Wednesday that Sprint Cup teams will continue to work on the 2017 rules package at next month’s race at Michigan International Speedway, scheduled for August 26-28.
Photo by: NASCAR Media
NASCAR first debuted modifications to the car this season at the All-Star Race at Charlotte Motor Speedway in May. Teams have continued to develop the aero package at both Michigan in June and Kentucky Speedway earlier this month.
With the modifications to the cars with the 2017 package, the downforce has dropped to 1,500 pounds — a reduction divided between the front of the vehicle, where the splitter was shaved from 5 to 2 inches wide, and rear which NASCAR trimmed the top of the spoiler by one inch (from 3.5 to 2.5 inches), the width from 64 inches to 53 and tapered the side fin (which continues along the deck lid to the new spoiler). The reduction has also decreased side force by 110 pounds.
In the bulletin Wednesday NASCAR also announced it has issued structural updates to strengthen the chassis.
NASCAR identified the floorboard, driver’s anti-intrusion plating, firewall and foot-box as areas in which it could strengthen the car. These updates will be optional for 2016, mandatory at superspeedways (Daytona / Talladega) in 2017 and at all tracks in 2018.
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