Lateral-g Forums - PWM cooling fan(s) control using ECM

Lateral-g Forums (https://www.lateral-g.net/forums/index.php)

- Cooling: Radiators/Fans/Controllers (https://www.lateral-g.net/forums/forumdisplay.php?f=89)

- - PWM cooling fan(s) control using ECM (https://www.lateral-g.net/forums/showthread.php?t=40215)

Thom is using a E92 ECU that came with a GM LT4 connect and cruise. That ECU and harness is set up for two discrete outputs and are already wired to relays in the Chevrolet Performance fuse box.

I also want the answer to this for this application.

Just so it is all on the same page.

Quote:

Originally Posted by GodSpeed (Post 686594)

I am trying to use a Factory ZL1 camaro fan. I have vintage air as well.

Any one have any success controlling the PWM fan as intended?

Thank you in advance.

Thom

Quote:

Originally Posted by andrewb70 (Post 686596)

Thom,

I have no direct experience with what you are doing, but I have some educated guesses. From what I understand, the ZL1 fans have the controller built into the fan. The connector (Yazaki) has two large pins for power and a small pin for the PWM signal wire. Again, from what I understand, you should be able to configure the ECM to send a PWM- signal to the fan and it should work. I would use the same settings of 128Hz and input the duty cycle table as with the C6 Corvette application.

Andrew

Quote:

Originally Posted by dontlifttoshift (Post 686617)

I wish I had one of these fans to experiment with. I'd like to see if they would work with the Holley ECU.

Andrew

I don't see why it wouldn't, it wants the same PWM signal.

The crew at V8 Speed said on a FB post that the GMPP E92 for the LT4 is programmable to run a pwm fan signal.

I am waiting for a couple of corroborating experiences, it is costly to undo.

Quote:

Originally Posted by andrewb70 (Post 686623)

I wish I had one of these fans to experiment with. I'd like to see if they would work with the Holley ECU.

Andrew

https://www.ebay.com/itm/2012-2015-C...AAAOSwuNFbeH16

Likely won’t find one for any less....

Don

Quote:

Originally Posted by dhutton (Post 686645)

https://www.ebay.com/itm/2012-2015-C...AAAOSwuNFbeH16

Likely won’t find one for any less....

Don

Don,

That looks like one of the fans from a 5th gen Camaro. I believe that if we are talking about the e92 ECU, then that would be the 6th gen Camaro...

Andrew

Quote:

Originally Posted by andrewb70 (Post 686731)

Don,

That looks like one of the fans from a 5th gen Camaro. I believe that if we are talking about the e92 ECU, then that would be the 6th gen Camaro...

Andrew

Sorry...

Don

Quote:

Originally Posted by dhutton (Post 686738)

Sorry...

Don

No need for apologies. I am just trying to keep all of this information as accurate as possible. We're all learning here...LOL

Adapting new OEM parts to our old clunkers is not easy, but I think there are many benefits to be had. As I understand it, the new fans are quite amazing!

Andrew

Quote:

Originally Posted by andrewb70 (Post 686739)

You know we're in deep when we're using words like AMAZING to describe cooling fans... LOL

Quote:

Originally Posted by eville (Post 686740)

You know we're in deep when we're using words like AMAZING to describe cooling fans... LOL

Geeks-R-Us...LOL

In all honesty, PWM fan control adds a great deal of refinement out our old cars. The information from this thread allowed me to implement it on my Cougar build and it truly is AMAZING! On my GTO, I am using dual Spal fans with binary fan control. The car has a relatively quiet exhaust and when the cooling fans turn on, it sounds like a jet engine.

On the Cougar, I never hear the fan, ever, and I have yet to see it go much above 50% duty cycle even on hot summer days. The C6 fan is rated at 400watts, while the new 6th gen Camaro fan, I believe is 800watts! So yes, amazing.

Andrew