Dyno testing

Funny thing, I run the exact plastic flex fan they lost 25 hp with. I use a manually controlled pusher electric as well, primarily for cool down between rounds. I use the plastic flex for one reason, it keeps 500hp cool. It's a primarily raced/occasionally street driven car, and cool is more important to me than 25 hp.
I could probably use a much bigger puller fan, an electric water pump, and drop a hundred pounds of exhaust, and pick up three tenths. Why? It's a bracket car, three tenths quicker means dick, I'd rather drive at 170° than 215.
I use the electric fans and water pumps on the race car. Really helps cool down between rounds.