Electric fan sounds like airplane taking off

[homeslicej2]

Originally Posted by drugsbunny

I guess these aftermarket fans are really loud. how come normal cars don't have loud fans. You cant even hear them when they turn on.

Do your fans turn off after a few seconds or do they stay on for a really long time? Im not sure what setting to put my thermostat too, because my fans stay on all the time, i have it to the lowest setting.

The more CFM the fans pull, the louder they will tend to be, no matter how the blades are designed (the curved S-blades are quieter than straight blades though). The blades are disrupting the air, the more air they disrupt, the more noise they will make. Of all the cars I've owned, all the fans (OEM or aftermarket, clutch or E-fan) have been fairly loud. If you have your thermostat for the fans at the lowest setting, they will turn on earlier. I have my fans set to turn on around 190, they cut off at 10 degrees below the turn on point (so 180). My controller is set with this 10 degree difference from the manufacturer.

When I dialed in my control box I let me car sit in the drive way and when the temp got up where I wanted them to kick on I turned the dial till they finally came on and left it there ever since. Just my

This is what I did too.