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Thoughts on temp spikes with AC on

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  #11  
Old 10-24-2017, 11:49 PM
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Originally Posted by whiskeynipple0088
Check the alternator too for bad bearings while your at it - mine where toast and it was a noticeable diff (like I added 5hp to the engine) once I replaced that.

I have a 4 core all aluminum rad - brand new hoses, pump, tstat - etc. Mine will still creep up to 220 with the a/c full blast on a hot day at rush hour
Alt is in great shape. Smooth as silk. It’s a nice magneti marelli unit I dropped in about a year ago.
 
  #12  
Old 11-07-2017, 04:44 PM
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Okay. Problem solved !!
Sunday I put in the pair of new flex a lite fans I had bought and I’m good now. Today I put the truck thru the temp rise trifecta. Stop and go local traffic, hitting the first red light after highway driving, and the dreaded drive thru wait. All without a raise in temp whatsoever. Not only that but while ac is running the temp drops slightly from its usual and stays there consistently.
So, my hunch was right and the old fans, which worked, just didn’t have the ***** anymore. The air flow from the flexalites is vastly superior.
 

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  #13  
Old 11-07-2017, 09:34 PM
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Post some pictures of how you mounted the fans. Would like to see the setup along with what model number fans did you use.
 
  #14  
Old 11-08-2017, 08:34 PM
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Originally Posted by ROB99DISCOSD
Okay. Problem solved !!
Sunday I put in the pair of new flex a lite fans I had bought and I’m good now. Today I put the truck thru the temp rise trifecta. Stop and go local traffic, hitting the first red light after highway driving, and the dreaded drive thru wait. All without a raise in temp whatsoever. Not only that but while ac is running the temp drops slightly from its usual and stays there consistently.
So, my hunch was right and the old fans, which worked, just didn’t have the ***** anymore. The air flow from the flexalites is vastly superior.
thanks for the follow up. always nice to see a problem get resolved.
 
  #15  
Old 11-09-2017, 06:39 AM
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ROBB, I appreciate the follow up and glad you figured it out. I suspect I'll be installing new fans next spring.

I'm guessing you used Flexalite 390. I've also seen folks use Hayden 3670.

The Flexalite (@ $85) blows 775 CFM @ 5A draw while the Hayden (@ $50) blows 650 CFM @ 5.4A.

Were the Flexalites "direct fit" or did you use some other method to fasten them to the fram of the radiator?
 
  #16  
Old 11-09-2017, 07:04 AM
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Hello All,
I would like to see some images too. I have been reading through the forum and very curious about this setup. For one my 96 D1 just has the viscous fan, so are you guys running additional fans along with the viscous fan or removing the viscous fan and running with an aftermarket electric fan setup?

T.I.A
 
  #17  
Old 11-09-2017, 11:29 AM
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The electric fans we are discussing sit in front of the radiator. They are turned on when the A/C is on or the coolant temp rises above a specific temp (IIRC it is 212 deg...but could be 220).
 
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  #18  
Old 11-09-2017, 11:34 AM
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Thanks for the reply Walt.
So these electric fans are an addition to the viscous fan for extra cooling security?
 
  #19  
Old 11-09-2017, 01:48 PM
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Yep. Supplemental cooling based on A/C and/or temp.
 
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  #20  
Old 11-09-2017, 01:54 PM
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Auhhh interesting!
I look forward to seeing images of this setup, seems like it makes for tight quarters in that area.

Thanks
 


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