Thoughts on temp spikes with AC on
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Rock Crawling
Joined: Oct 2015
Posts: 258
Likes: 16
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
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
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Rock Crawling
Joined: Oct 2015
Posts: 258
Likes: 16
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.
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.
Last edited by ROB99DISCOSD; Nov 7, 2017 at 04:45 PM. Reason: Error
Recovery Vehicle
Joined: Jan 2011
Posts: 1,170
Likes: 300
From: StL, MO
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.
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.
TReK
Joined: Mar 2010
Posts: 2,776
Likes: 623
From: NYC
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?
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?
Recovery Vehicle
Joined: Sep 2015
Posts: 1,125
Likes: 77
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
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
