![]() The drivers mostly said that they couldn't tell any difference with the change of the shape in the underpanel. "It looks scary when you see there's not one on it," Logano said. That change, though, could make the cars incredibly unstable and also impact the speeds enough where it impacts brake cooling, which also is a key element for the cars on short tracks and road courses. "I think maybe you can take the whole thing off possibly and be OK."Ī 2-inch spoiler is about as low as NASCAR could go at the moment unless it goes with no spoiler. It made us move up a little bit, which made us a little bit more racy. "It made us slide around a little bit more on the racetrack. "It seemed like the smaller spoiler, directionally, helped," defending Cup champion Joey Logano said after testing the 2.5-inch spoiler. The cars were hard to drive, but it didn't appear to give the cars more of an ability to pass. NASCAR initially planned to only test a spoiler of 2.5 inches, but drivers asked to see what would happen at 2 inches. The idea was that with reduced rear downforce, drivers will have a little more difficulty controlling the car, plus there will be less turbulent air hitting the front of the car that it could make it easier to pass. NASCAR also tested a new underpanel for the car and reduced the rear spoiler from 4 inches to 2.5 inches and then 2 inches. ![]() "We got some feedback that we need to keep working on the temperature in the cockpit. "The sound reduction was in the order of what we expected. "Overall pretty happy with what we had," said NASCAR Vice President of Vehicle Development Eric Jacuzzi. NASCAR had hoped to reduce the decibel level by six to 10 decibels. While NASCAR is committed to using mufflers for the Clash and Chicago, many in the industry believe that if fans approve of the sound level and the heat issues are addressed, the mufflers could be added for short tracks, where the noise often keeps fans from even talking to the person sitting beside them during the entire event.
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