Since the speeds are lower on the short tracks, getting an adequate volume of cooling air to the engine and brakes can be a challenge -- especially since the engines and brakes generate more heat during short-track racing. The grill opening on the front of a short-track car is larger than on a super-speedway car, and extra vents duct air directly onto the brakes.
On the super-speedways, the track is much longer and straighter and the banking is high, allowing cars to maintain a high speed all the way around the track. The goal in building a car for super-speedway tracks is to reduce drag as much as possible. These tracks require the use of restrictor plates that reduce engine power from about horsepower hp to hp. Since the engine is not producing its full power, it is critical to make the best use of the power available by reducing drag.
The body on a super-speedway car is mounted forward on the frame to reduce drag. The sides and the fenders are less contoured, and the grill opening is carefully tested in a wind tunnel to find the smallest-sized opening that will provide the necessary cooling airflow.
At the higher speeds of a super-speedway track, there is enough airflow for cooling the brakes, and a much smaller grill opening can provide adequate cooling for the engine.
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Martinsville Speedway 0. Watkins Glen and Sonoma are the two road courses on the Cup Series calendar. Do you have a favorite? Let us know! By Abhay Aggarwal. Abhay Aggarwal is sports analyst at EssentiallySports.
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