RE: [Chrysler300] Fan, Fan Clutch, Fan Shroud

["C Bilter" <cbilter@xxxxxxxxx>]

The club website has some details about fans/clutches used on letter cars
that may be of help here:

 

http://www.chrysler300club.com/tech/fan.htm

 

The letter cars of this ear used a "silent flite" non-thermal fan clutch
which essentially free wheeled at higher rpms (when higher fan speeds were
not needed for cooling) in order to provide more HP.  On New Yorkers etc.
they didn't care about providing more HP at higher rpms.  In 1963 on the J
they made a running change to a thermal fan clutch.

 

Carl Bilter

In hot and humid Iowa 

105 projected today with heat index at 115

Properly working fan clutch most advantageous in these conditions 

 

  _____  

From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of 2HsandaHeritage@xxxxxxxxxxx
Sent: Tuesday, July 24, 2012 11:18 PM
To: Chrysler 300 Club International
Subject: [Chrysler300] Fan, Fan Clutch, Fan Shroud

 

  



Hi Group, 

  

I am somewhat confused about the operation of fan clutches and the reasons
for their use. 

My questions apply to 1962 vehicles with 413 engines because I am familiar
with them and have the parts book. 

A 300H w/o air has a fan clutch and 7 blade fan. 

A 300H w/air has a fan clutch, 7 blade fan and a shroud. 

A New Yorker w/o air only has a 4 blade fan. 

A New Yorker w/air has a fan clutch, 7 blade fan and a shroud. 

  

I have always thought that the purpose of a fan clutch was to lessen the
energy required to rotate it when it was not needed for cooling. 

I also thought that the viscosity of the fluid in the fan clutch changed
with temperature so that it would increase in rpm to match that of the water
pump when needed for increased cooling. 

The shroud on air conditioned cars is there to help the 7 blade fan pull
more air through the radiator that is blocked by the ac condenser in front
of the radiator. 

  

The above makes sense to me except for the difference between the 300H w/o
air and the New Yorker w/o air. 

Why would the New Yorker only have a 4 blade fan and no fan clutch? Perhaps
robbing HP was not considered important for tha New Yorker. 

  

Doug Warrener 

Fair Oaks, CA 

300H 

62 300 Sport Conv.   
 

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