PWM cooling fan(s) control using ECM

[parsonsj]

Originally Posted by Dave

E67 controller has 3 fan output drivers - however, when used with PWM fan control, only one of those outputs is utilized. It provides a PWM output at frequency specific to the fan driver controller. I've not measured voltage based on PWM % output to determine what way the voltage goes based on desired output.

When fan drivers are used as discrete outputs, they can be used to close relays that can then be wired in parallel, series or parallel series combination to drive mutliple fans at low and high settings.

I'm a huge fan of PWM cooling fan control as I HATE listening to high speed fan during anything other than track situations that demand it. Nothing worse than pulling up and having the sweet rumble of an engine masked by a fan screaming away.

Me too on PWM control.

So... net net: I need to use a C6 fan controller since it is definitely compatible with the E67. For dual fans, I need to use two controllers, and hope that the E67 can drive two PWM controllers from the same wire.

[mikels]

Originally Posted by parsonsj

Me too on PWM control.

So... net net: I need to use a C6 fan controller since it is definitely compatible with the E67. For dual fans, I need to use two controllers, and hope that the E67 can drive two PWM controllers from the same wire.

I've run 2 fans with single PWM C6 fan controller (have to look at total power demands and keep in limits of fan controller) and know that works.

Lou is trying dual PWM modules controlled by single PWM output from ECM -will know soon the success of that route.

[parsonsj]

Originally Posted by Dave

I've run 2 fans with single PWM C6 fan controller (have to look at total power demands and keep in limits of fan controller) and know that works.

Lou is trying dual PWM modules controlled by single PWM output from ECM -will know soon the success of that route.

OK, that's good to know. I'm using the C&R Racing setup with their dual Spal 11" fans.

Is that the fan setup you know works?

[mikels]

Originally Posted by parsonsj

OK, that's good to know. I'm using the C&R Racing setup with their dual Spal 11" fans.

Is that the fan setup you know works?

Corvette fan is 400W - so at 12.5 V, that's 32 A. So long as your 2 Spal fans are below that current level, should work fine.