[Ed Wright]

Everybody probably does this, but with an electric pump & fans, it is easier to cool your engine down. A four wire connector to your fan & pump relays can be unplugged from the car, and connected to a separate battery. You can cool it back to ambient temp in a fairly short time. Not as fast as a chiller, not as messy either. LOL
Easier to make every run at similar water temps. Easier to dial the car that way. This is a very sharp group, so likely everybody know this.