<VV> A Tale of Two Fans

[ScottyGrover at aol.com]

In a message dated 8/5/2007 11:13:24 A.M. Pacific Daylight Time, jld at wk.net  
writes:

I need  all the cooling I can get.  No angular ring here. The reason 
for the  early fan was to limit air reversion around the top shroud 
inlet.  I  had beat my top shroud down as close to the fan as I dared 
to eliminate  the reversion as much as I could.  I could still feel 
the air with my  hand at 3,000 fan rpm.  The 61 setup eliminates this 
problem.  I  believe (no data) that the 61 fan uses less energy to 
produce the same air  pressure as the late model fan.  GM  figures on 
air flow and  pressure from dyno test show the fans are nearly equal 
in air flow and  pressure developed (at least to 4,000 rpm).  Of 
secondary importance  is the 61 fan catches shop rags and paper towels 
where as the late model  fans eat them spitting them out on the 
cylinder heads and oil  cooler.
Jim Davis





The radial-blade type centrifugal fan is used in industry for duct  
collectors and other applications where crud has to be passed through the  fan.
 
Scotty from Hollyweird



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