Champ car racing:
Champ car is the short for championship car, world series of champ cars include sixteen races that are run between March and November. Two races are held in Australia and South Corea and the other fourteen are held in the U.S, Canada and Mexico.
The races are mostly held on road courses, but also in ovals. The average length of Champ courses is about 2 miles and cars can reach speeds close to 200 mph. Tracks are shorter than in Formula 1 and have around 9 turns while in Formula 1, tracks can have between 12 and 20 turns.
Champ cars are heavier than Formula 1 cars, they also have a longer wheelbase, this is because they're designed to run also in oval courses where higher speeds put more stress on a car and stability is more important.
Champs are powered by methanol and turbocharged while Formula 1 use gasoline, another difference is that in Champ car racing, it's allowed to make changes on tires which can result in a more unpredictable race, making the race more exciting for fans and bettors.