Holley HP PMW Cooling Fan Control

[hotwired]

Ok so I was reading on another post on here using the E67 for PWM fan control and the Vette #15-80803 controller and it got me thinking.

I am installing the Holley HP efi on a customer vehicle with a boosted LS7, and it has a single cooling fan.

Checking the outputs I am able to set up a -(low) PWM set to a fixed frequency or 128Hz. I set up a table using MAP and CTS for the x and y axis and table units with duty cycle so that the fan could ramp up for both temp and boost pressure.

Input triggers set at:
RPM activate above 450 (so will only come on with engine running)
Temp activate above 170 (so fan starts at 25% and will ramp up to 95% by 195)
VSS deactivate above 60 MPH

Any thoughts? I have not installed or attempted yet but appears it should work?

[hotwired]

Lots of views and no comments ? Has anyone done this with any other PCM other than OEM? Willing to try was just hoping for some encouragement.

[hifi875]

my holley ecu had a fan output 2 actually. I just hooked up my fans and programmed into the ecu as to what temp they come on.

[carbuff]

Yes, that works, but he is specifically asking about the PWM functionality to run the fans at slower speeds. I have an HP EFI installed, but did not try to use that functionality. I would love to get more information on doing this also...

[hifi875]

Yes, that works, but he is specifically asking about the PWM functionality to run the fans at slower speeds. I have an HP EFI installed, but did not try to use that functionality. I would love to get more information on doing this also...

I had a spal pwmv3 or whatever before I got my efi and that thing worked good when it worked, but half the time it defaulted to fact and would lose programing and I didn't like it at all.

[hotwired]

another option in place of the gm controller:

http://www.amazon.com/gp/product/B000VU5FPE/ref=wms_ohs_product?ie=UTF8&psc=1&tag=vglnk-c58-20

anyone have experience with these?

might need to 2 wired in parallel to handle the amps.

Also not sure what Hz to operate them at.

[snappytravis]

I emailed holley a few weeks back on this same issue with a f5 controller. They pretty much said run it by itself, It is a pwm type controller. I believe if you try to run it the way you are wanting to you need to use two relays. I think they can be triggered. Let me know what you come up with.

[hotwired]

I emailed holley a few weeks back on this same issue with a f5 controller. They pretty much said run it by itself, It is a pwm type controller. I believe if you try to run it the way you are wanting to you need to use two relays. I think they can be triggered. Let me know what you come up with.

What Holley are you running?

[snappytravis]

Holley hp ecu with a ls3. Go to the holley forum, I see your on there already. Go to page two and about the 15th post down is one I put on there see if there is anything that helps. I think the amp draw is to much?