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

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

I see, you put it in the 8. I'm going in the 6 with mine....at least I want to.

For an #8 with EZclip weatherhead FJ3427-0808s is an inline splice with the correct M10-1.25 port on it.

I was hoping someone had an adapter that would go in the drier.

Yep, that would be cleaner... but not how GM did it.

My Z06 has the sensor inline in the 8, so I followed suit. I doubt it matters.

Quote:

Originally Posted by parsonsj (Post 543118)

Yep, that would be cleaner... but not how GM did it.

My Z06 has the sensor inline in the 8, so I followed suit. I doubt it matters.

I went to the local junk yard & found a couple cars that had them on the already cut AC lines, so I cut the sensor & fitting out of the rest of the line. Local AC shop says they can braze them onto a 90 degree fitting. I got the sensors for $10 as you see below.
http://i242.photobucket.com/albums/f...04653_edit.jpg

Quote:

Originally Posted by JMitch19 (Post 500261)

Your module appears to be mounted in a location that won't see much moisture/water anyway, so I don't see you having a problem with the foam method.

I didn't go read the entire thread --- but whatever happened to the use of good old dielectric grease on an electrical connector to keep moisture and corrosion at bay.

I gave up on using "spade" connectors a long time ago -- now it's Metripak or Weatherpak only in my garage... particularly given the low voltages in todays electronics.

Some nice solutions on the A/C connectors!

Quote:

Originally Posted by Syclone892 (Post 539614)

Hi Scot

I am defiantly new to this stuff and trying to understand just so you know and can go easy on me :D
From what I have been reading the dominator will send out a pwm + or - signal, if I wire that to a solid state relay the relay is able to handle the pwm signal and will pulse the power or ground of the fan. Here is where I got the idea
http://forums.holley.com/showthread....Fan-Holley-EFI
So the way I understand it is the ecu is doing the controlling and can speed up or slow down the pwm and the relay will then pulse the power (or ground depending on hookup) to the fan.
To me thats what the stock e67 ecu is doing and sending it to this module which to me sounds like a ssr.

If I was able to get more info on this control module I may be able to understand it more but so far thats what I have gotten out of it :D

If this is just a nice ssr I was thinking of using it to control my fuel pump also because that is way less amps than fans.

Thanks for more info I hope I can understand this stuff even more before I have to start doing the actual work!

I hooked my fans up to the holley hp ecu. I had to go in and turn the fans on and then designate two wires for 12-, I set the temp at when I want fan wire 1 to come on and it sends a 12- signal to the relay. I then set the temp for fan 2 wire and it also goes 12- when the temperature is reached. Seems to work good so far. For your fuel pump get a hold of Carl Casanova he is the owner of vaporworx. Good guy and great tech support.

For those who want to use the King Kong of PWM fans, the Cadillac SRX turbo fan that Mark Stielow uses, here is the part number and programming data from Mikels over on the Camaro XV thread:

"SRX turbo fan part number is 25931645 as you show. PWM controller is built in to fan motor - so no separate module like Corvette fan.

Max PWM duty cycle is 90% positive polarity @ 100 Hz (need this for calibration). Size wiring & fuse appropriately - 64 AMPS peak.

First used this fan on Red Devil and dropped coolant and oil temps ~10F just by changing to this fan from 400W Corvette fan.

Dave"

Thanks for copying it over-great information.

Apologies if it's already been mentioned, but do you happen to have the dimensions of that SRX fan? I'm wondering how well it would fit a 'normal' sized radiator which drops into most of our cars...

Thanx!

Where are you buying this thing? I looked up the P/N & price ranged from the upper $500 to over $700.

Quote:

Originally Posted by carbuff (Post 579333)

I don't have the dimensions. But Stielow also used this fan on Red Devil and Mayhem, which both had more conventional radiator packaging ...