...

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



Reply
 
Thread Tools Display Modes
  #21  
Old 02-20-2013, 11:15 AM
parsonsj parsonsj is offline
Lateral-g Supporting Member
 
Join Date: Aug 2004
Location: Winter Springs, FL
Posts: 656
Thanks: 0
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by Dave
Most output functions of ECM are that way: injectors, coils, etc. Ground signal is switched with power supplied directly to device.
One notable exception: fuel pump. That's a 12V signal.
__________________
John Parsons

II Much Fabrication's Blog New products, Fabrication sequences, etc.

Last edited by parsonsj; 02-22-2013 at 09:54 AM.
Reply With Quote
  #22  
Old 02-20-2013, 11:41 PM
CarlC CarlC is offline
Senior Member
 
Join Date: Aug 2005
Location: Newbury Park, CA
Posts: 600
Thanks: 12
Thanked 81 Times in 29 Posts
Default

DC Controls has a stand-alone PWM that can handle 85A continious. I had to change to an FK55 for the MarkVIII fan since the initial turn-on current was melting the ends of the connector body.

http://www.dccontrol.com/fk85.pdf

I'm learning a ton here. Thanks for the great discussion and info sharing.
__________________
http:www.vaporworx.com
Reply With Quote
  #23  
Old 02-21-2013, 04:10 PM
clill's Avatar
clill clill is offline
Moderator
 
Join Date: Jul 2004
Posts: 3,245
Thanks: 45
Thanked 1,267 Times in 479 Posts
Default

Now imagine sitting in a bar listening to a conversation between Mikels and Stielow.
Reply With Quote
  #24  
Old 02-21-2013, 04:27 PM
dontlifttoshift's Avatar
dontlifttoshift dontlifttoshift is online now
Senior Member
 
Join Date: Oct 2012
Location: Beach Park. IL
Posts: 928
Thanks: 10
Thanked 168 Times in 100 Posts
Default

That would be the coolest bar I would have ever been in......
__________________
Donny

Support your local hot rod shop!
Reply With Quote
  #25  
Old 02-21-2013, 04:44 PM
Lous69 Lous69 is offline
Lateral-g Supporting Member
 
Join Date: May 2012
Location: St. Louis
Posts: 143
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by clill View Post
Now imagine sitting in a bar listening to a conversation between Mikels and Stielow.
We Engineers think this stuff is intoxicating...we don't need no stinkin bars...

Well OK, in Rolla we did need our bars because there were no women.

I guess we are a pretty sad lot
Reply With Quote
  #26  
Old 02-22-2013, 09:55 AM
parsonsj parsonsj is offline
Lateral-g Supporting Member
 
Join Date: Aug 2004
Location: Winter Springs, FL
Posts: 656
Thanks: 0
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by Lou
We Engineers think this stuff is intoxicating...we don't need no stinkin bars...
Hell, I think this was the highlight of my week!
__________________
John Parsons

II Much Fabrication's Blog New products, Fabrication sequences, etc.
Reply With Quote
  #27  
Old 02-22-2013, 11:18 AM
dontlifttoshift's Avatar
dontlifttoshift dontlifttoshift is online now
Senior Member
 
Join Date: Oct 2012
Location: Beach Park. IL
Posts: 928
Thanks: 10
Thanked 168 Times in 100 Posts
Default

If I missed it it, I apologize. But what compressor are you running? The factory compressor is controlled by the ecm not just at the clutch but it varies the pitch on the vanes right? I didn't think that variable compressor is compatible with the VA unit?

If you are running a sanden compressor then why not leave the ecm out of the equation for the ac? You could run a 5 volt ref to one side of the trinary and from there to the ecm to tell it that ac is on. It would only make when the specified pressure is reached and you could set it to run at, say 40% on the pwm when the AC calls for it.

It really doesn't take that much fan to cool off the condenser. When we charge systems here, the fan only cycles for 8-10 seconds at a time and doesn't cycle again for at least another 90 seconds. You can watch the high side pressure drop quickly, you would swear it had a leak. So in my mind it would be simpler to do it that way and not have to worry about the oem pressure sensor.
__________________
Donny

Support your local hot rod shop!
Reply With Quote
  #28  
Old 02-22-2013, 11:32 AM
parsonsj parsonsj is offline
Lateral-g Supporting Member
 
Join Date: Aug 2004
Location: Winter Springs, FL
Posts: 656
Thanks: 0
Thanked 1 Time in 1 Post
Default

In my case, it's a Sanden. I was looking for a solution that doesn't cycle the fan at max speed for 10-15s every 90s... but would run a lower fan speed for longer times. I don't know of any aftermarket fan controller that supports that, so I thought having the ECM do it would be a nice integrated feature.
__________________
John Parsons

II Much Fabrication's Blog New products, Fabrication sequences, etc.
Reply With Quote
  #29  
Old 02-22-2013, 11:56 AM
Lous69 Lous69 is offline
Lateral-g Supporting Member
 
Join Date: May 2012
Location: St. Louis
Posts: 143
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by parsonsj View Post
In my case, it's a Sanden. I was looking for a solution that doesn't cycle the fan at max speed for 10-15s every 90s... but would run a lower fan speed for longer times. I don't know of any aftermarket fan controller that supports that, so I thought having the ECM do it would be a nice integrated feature.
That is our current thinking too. We are also using the Sanden compressor.
We plan to let the Vintage Air system control the compressor as it is designed and use the ECM control to the fans since it looks like that can work.
Reply With Quote
  #30  
Old 02-22-2013, 01:24 PM
dontlifttoshift's Avatar
dontlifttoshift dontlifttoshift is online now
Senior Member
 
Join Date: Oct 2012
Location: Beach Park. IL
Posts: 928
Thanks: 10
Thanked 168 Times in 100 Posts
Default

So you are trying to eliminate the on/off cycle. If the fan soft starts and runs at half speed for the AC I think it would work. This is really only critical during warm up, I think, once up to temp wouldn't normal fan cycling move enough air to keep the trinary switch out of the loop?
__________________
Donny

Support your local hot rod shop!

Last edited by dontlifttoshift; 02-23-2013 at 06:46 AM.
Reply With Quote
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 04:12 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright Lateral-g.net