PWM for fans, will this work?

[Larry R]

Originally Posted by Ketzer

I read through quite a bit of the other thread but didn't see this asked...

Is this method of controlling the fans better than using a fan module from one of the wiring or radiator companies?

Jeff-

I really cannot say whether it is better than an aftermarket controller. Better is subjective; this method requires an ECU, whereas most aftermarket controllers are stand alone. PWM or pulse width modulation, has the advantage of being able to run the cooling fan(s) only as much as they are needed and that can be programmed, as I did in my Holley HP ECU. I do believe there are some aftermarket PWM controllers out there. Many, if not most, new cars use PWM controllers because It is more fuel efficient as well as extending the life of the fan(s), not to mention quieter than having a fan roaring at high speed when it is not needed. Hopefully others will chime in as I am far from an expert. Larry