-- 4 rounds = 8 machines ( 8 -- 4 -- 2 -- 1), of the nitro classes (Funny Car & Top Fuel), plus the other classes. -- Personally Super Stock, Alcohol, and the Nitro classes, are the only ones that I care about, at a National Event. -- 300+ MPH is a hoot. -- At a weekly event I like the stock classes. -- Of course, this is all based on Your preferences.