Koolaid welcome to IOW. Some of the differences between a silvercrown car and a sprint car
Silvercrown cars are longer and heavier then sprint cars, A silvercrown car weighs close to 1500 pounds, a sprint car weighs close to 1200 pounds. The silvercrown car runs a 355 cu in engine, the sprint car can run up to 410cu in engine. The Silver Crown cars run longer races, up to 100 miles or laps, on tracks 1/2 mile and larger. The Sprint cars usually run shorter races 25 or 30 laps, usually on tracks 1/4 mile or 1/2 mile. To sum it up, the sprint cars are faster, the Silver Crown cars are more of an endurance race where tire wear is an issue. I am sure others on here can explain some more differences. Here is a link to USAC,
http://www.usacracing.com/assets/fil...ACRULEBOOK.pdf