Cooling not worth a SH!T

Heating, Cooling & AC

  1. 5.7 hemi

    5.7 hemi FBBO Gold Member FBBO Gold Member

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    Clutch fan is better, and stick with a shroud.
     
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    • Sweet5ltr

      Sweet5ltr Well-Known Member

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      I know, it prompted me to immediately remove the mechanical fan and re-install the Jaguar clutch fan with a shroud. 5% (+/-) power loss on a 600-hp engine. Well, it could be much more, just re-watched the episode, they shut it down at 5,000-5,200 RPM.

      Here is an article on how to change the thermal clutch fan engagement temperature range:
      http://midamericachevelles.com/tech/fan_clutch_adjust.pdf
       
      Last edited: May 11, 2018
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      • SlinktRR

        SlinktRR Well-Known Member

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        I have a clutch fan in the garage, I’m now motivated to install it and see if it keeps the temps in a similar range as the mechanical. I’m still leaving power on the table, but hopefully less than 30hp.
         
      • Sweet5ltr

        Sweet5ltr Well-Known Member

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        Great, the problem most of us had is the thermal clutches (that fit our cars) aren’t necessarily designed to fully engage under 195* F. When in reality, we would want it to fully engage around 180* F (or less) to keep engine operating temperatures down at idle (keep it as close to the thermostat or minimum desired operating temperature as possible). The Chevrolet article makes a good point, that even the reproductions aren’t rated the same thermal lockup temperature as the original.
         
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