...

Go Back   Lateral-g Forums > Technical Discussions > Cooling: Radiators/Fans/Controllers
User Name
Password



Reply
 
Thread Tools Display Modes
  #471  
Old 01-26-2019, 01:58 PM
dontlifttoshift's Avatar
dontlifttoshift dontlifttoshift is offline
Senior Member
 
Join Date: Oct 2012
Location: Beach Park. IL
Posts: 803
Thanks: 2
Thanked 36 Times in 23 Posts
Default

Andrew, bolding mine.

Quote:
Originally Posted by erick_e View Post
Well, I finally got around to testing my theory about the brushless fans working with the factory ECM.

Bottom line, the factory ECU can control these fans. Since I had already replaced by previously burnt up fan connector I was able to quickly connect the brushless fan to my car with another connector. Its just as simple as connecting the B+, B-, and PWN wires together. The factory ECM commands 128Hz, and the brushless fan is recommended for 100Hz. SPAL tech support says 128 should be OK, but 100Hz would be optimal. This can easily be changed with HPTuners or EFI Live. Changing the PWM type was not required. PWM Electric is what is required, not PWM EV like the C7 Corvette.

Once connected I fired up the Tech2 and commanded the fan on. Below you see it running at 90% duty cycle. I had the fan facing down to create restricted airflow (to simulate radiator, condenser and
heat exchanger). Notice it only dropped .3v at 90%. Not bad considering the vehicle wasn't even running.



I didn't have time to test fit Dewitt's fan shroud with my EForce. Hopefully it fits, it's a beautiful shroud. But if it doesn't fit I might be able to make the brushless fan work with the original shroud with an adapter. The fan blade is the same dimension as the OEM blade, but the motor is a little smaller in diameter. I'll cross that bridge when I have to, if I have to. Hopefully the Dewitt's shroud doesn't interfere with my coolant lines and I don't have to.
__________________
Donny

Support your local hot rod shop!
Reply With Quote
The Following 2 Users Say Thank You to dontlifttoshift For This Useful Post:
ldellhest (02-22-2019), yanyere (01-26-2019)
  #472  
Old 01-26-2019, 05:48 PM
andrewb70's Avatar
andrewb70 andrewb70 is offline
Senior Member
 
Join Date: Jul 2005
Posts: 556
Thanks: 3
Thanked 16 Times in 13 Posts
Default

Thanks Donny!

I follow this thread closely, but somehow I missed that video!

Looks like those new Spal fans with the controller built in would be easy with the Dominator! I am always looking for cool, new stuff for future builds!

Andrew
__________________
My YouTube Channel
Reply With Quote
The Following 2 Users Say Thank You to andrewb70 For This Useful Post:
ldellhest (02-22-2019), yanyere (01-26-2019)
  #473  
Old 02-19-2019, 05:54 PM
stan65 stan65 is offline
Member
 
Join Date: Oct 2014
Location: Toledo, IL
Posts: 35
Thanks: 1
Thanked 10 Times in 7 Posts
Default

Anyone know what PWM voltage the ECM is outputting? 5v, 12v?

Thinking I may tackle it as an arduino project as I have GMPP LT4 controller.

Stan
Reply With Quote
The Following User Says Thank You to stan65 For This Useful Post:
ldellhest (02-22-2019)
  #474  
Old 02-19-2019, 05:58 PM
LonnieJ LonnieJ is offline
Junior Member
 
Join Date: Jan 2006
Posts: 6
Thanks: 0
Thanked 2 Times in 2 Posts
Default

Quote:
Originally Posted by stan65 View Post
Anyone know what PWM voltage the ECM is outputting? 5v, 12v?

Stan
I'm definitely not an expert, but from my countless hours researching I believe it is 5V

Lonnie
Reply With Quote
The Following User Says Thank You to LonnieJ For This Useful Post:
ldellhest (02-22-2019)
  #475  
Old 02-19-2019, 06:52 PM
andrewb70's Avatar
andrewb70 andrewb70 is offline
Senior Member
 
Join Date: Jul 2005
Posts: 556
Thanks: 3
Thanked 16 Times in 13 Posts
Default

Quote:
Originally Posted by stan65 View Post
Anyone know what PWM voltage the ECM is outputting? 5v, 12v?

Thinking I may tackle it as an arduino project as I have GMPP LT4 controller.

Stan
Stan,

It is PWM- so it is pulsing to ground.

Andrew
__________________
My YouTube Channel
Reply With Quote
The Following User Says Thank You to andrewb70 For This Useful Post:
ldellhest (02-22-2019)
  #476  
Old 02-19-2019, 08:45 PM
LonnieJ LonnieJ is offline
Junior Member
 
Join Date: Jan 2006
Posts: 6
Thanks: 0
Thanked 2 Times in 2 Posts
Default

Thanks Andrew for setting me straight! You have forgotten more on this subject than I'll probably ever know The 5V most be the a/c pressure sensor?
Reply With Quote
The Following User Says Thank You to LonnieJ For This Useful Post:
ldellhest (02-22-2019)
  #477  
Old 02-19-2019, 09:19 PM
dhutton dhutton is offline
Senior Member
 
Join Date: Nov 2006
Location: Mountain Springs, Texas
Posts: 1,462
Thanks: 131
Thanked 60 Times in 41 Posts
Default

The voltage swing of the active low PWM signal would be determined by the voltage the pull-up resistor etc is connected to. If you connect it to 12 volts you will get a 12 volt signal.

Don
Reply With Quote
The Following User Says Thank You to dhutton For This Useful Post:
ldellhest (02-22-2019)
  #478  
Old 02-20-2019, 06:32 PM
jmac jmac is offline
Senior Member
 
Join Date: Mar 2008
Location: Howell, NJ
Posts: 108
Thanks: 0
Thanked 2 Times in 2 Posts
Default

Wow, what a great thread with a wealth of knowledge from multiple contributors!

I'm very intrigued by this.

From what I've read, can you use the Spal brushless fans alone with PWM control without having to use the controller from the C6 or Ford Fusion?

I'm referring to post #445 from Blake-B.

Is the controller built in to the fan motor?

Thanks!
Reply With Quote
The Following User Says Thank You to jmac For This Useful Post:
ldellhest (02-22-2019)
  #479  
Old 02-21-2019, 09:27 AM
samckitt's Avatar
samckitt samckitt is offline
Senior Member
 
Join Date: Dec 2005
Location: Carrollton, VA
Posts: 310
Thanks: 0
Thanked 1 Time in 1 Post
Default

A few people have asked me if I had any more of the connector kits for the Corvette PWM module. In the past I had kits that is the connector body, 4 large high amp terminals & seals, a small terminal & seal for the signal, & some blank plugs for the open holes. I am trying to get all the parts for the other connector that is 2 high amp terminals & one small terminal so the fan assy can be easily removed if needed.

If I was to order more to make these kits, who would be interested in them and would you want all mentioned above, or just the connector for the module itself?

Not sure yet what price would be until I find out what they are charging me. In the past I sold them for $50 shipped for the module connector kit alone. I probably can do it for less if enough ordered.



Trying to find both sides of this connector too:
__________________
Scot
86 Monte SS
LS2/T56 Magnum
Reply With Quote
The Following User Says Thank You to samckitt For This Useful Post:
ldellhest (02-22-2019)
  #480  
Old 02-21-2019, 06:32 PM
eville's Avatar
eville eville is offline
Senior Member
 
Join Date: Feb 2006
Location: San Leandro, CA
Posts: 144
Thanks: 4
Thanked 3 Times in 3 Posts
Default

Quote:
Originally Posted by samckitt View Post

Trying to find both sides of this connector too:
Sam, I think this is what you're looking for: https://www.amazon.com/replacement-C...teway&sr=8-130
https://www.amazon.com/Replacement-C...ateway&sr=8-49
__________________
Steve
'68 Camaro - 355", TKO600, SpeedTech Arms, AFX Spindles, Hotchkis Springs, Forgeline, blah blah blah.

Check it out Here
Reply With Quote
The Following User Says Thank You to eville For This Useful Post:
ldellhest (02-22-2019)
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 03:38 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Copyright Lateral-g.net