Testing out my PWM fan with an XY-PWM Generator on a 1978 Chevy K20 LS swap!

[@AibekToroev]

Thank you very much. Purchased the same PWM controller to test my AUX FAN. It is working. I have checked the power wires and there is 12 volts. So now I need to check the PWM wire which comes from the ECU.

[@craigd1275]

LS Swap I was looking at that engine and thought "that's not a 78 engine." Wish I still had my 73.

[@طلالالشمري-ب7و]

Love the shroud, any more video of how you make it

[@ElCyberMonkey]

Gracias . informacion muy util

[@tgy119]

Can you run pwm control signal wire in parallel with another controller? For example, if your ecu is setup to control your fan but you also wire in this little pwm controller by tapping into the same pwm signal wire..for instances where you want to run the fan harder than the temp settings in your ecu or for when ecu fan control failed you have back up control.

[@alaskatech1562]

I don’t believe you can run parallel signals. Unless you were to isolate the two circuits by switch or diode, I think the signals would interfere with each other. I don’t see an issue with running a backup control as if one signal failed the other won’t interfere.

[@أبوعبدالله_العاصمي]

Good Job.

[@kensproject9564]

Does it work on variable temperature and changes speed when engine gets hot?

[@alaskatech1562]

The PWM controller shown will not. The Holley Terminator X does, and is what I’m using to control them.

[@joseb1700]

So u use the neg trigger from the term X to control the relay n then the pwm just controls the speed correct??

[@alaskatech1562]

The fan itself has a built in PWM relay, and I use a custom table in the Terminator X to send a PWM (%) signal to the fan based on engine temperature.

[@joseb1700]

@@alaskatech1562 can u just run them separate n just have term just trigger at temp n just send it at high? Don’t wanna use an I/o up if I don’t have too??

[@alaskatech1562]

@@joseb1700 I didn’t use this part at all in my setup. It was strictly just for testing what PWM signals the fan accepted, which got input into the Terminator X. You can do what you’re describing, but at that point there’s no point in using a PWM setup, as the benefit of this is to utilize the fans’ ability to run only at the speed necessary to cool the radiator and not draw unnecessary power.

[@Airman..]

How are you managing these fans on yout swap?

[@alaskatech1562]

They are controlled by a Holley Terminator X.