In my opinion a lot of the engine master guys leave things on the table because they are entering an engine that is not built specially for the challenge, just something they thought would be fun to show case. That is the only way I can explain certain things I see in the contest, engines built to peak way past the cutoff RPM, not maxing out compression or quench or... tons of things, the winners/runners up do everything to win, maybe the firs 5 places, the others apear to just show up with an engine that is a hoge-podge of whatever is laying around the shop.