I would imagine that at high speed the fans would be considerably louder than the regular fans are? I can't even hear when my fans come on low speed (exhaust drowns everything out), usually the only way I can tell is if I have my hand out the window I can feel the hotter air rising up from under the car in traffic or when I have the app on I have it set to flash the display once the temp reaches 215. If I am running the AC it stays on and the temp never rises above about 206. I am sure that at some speed the PCM shuts off the fans as there is enough airflow to cool the system, I would think about 45 or so?
Jeff
