[jjtarnow]

The guy that told me about the wasted push fans actually owns a racing team and seems somewhat credible. The other thing I have been told is that the old police cruiser/taxi idea of proping open your hood at low speed/idle when it's really hot actually increases the operating temperature. Supposedly cars are designed to guide the airflow through the radiator and then the engine to allow the block/heads to shed heat. When you open the hood it disrupts the intended air flow and the bottom of the motor (I realize heat rises) suffocates. At idle, clearly the low rpm fan flow coupled with no additional air coming in from forward motion would suggest proping the hood open could be of help. Also, after an exeptionally hot run you should open the hood all the way to allow the heat to escape (although the best possible thing to do is hit the highway and cool it down prior to shut down).

Josh