<VV> Kamm Back and Exhaust Fumes

[HallGrenn at aol.com]

In a message dated 3/15/2008 1:11:04 P.M. Eastern Daylight Time,  
ricebugg at mtco.com writes:


The  Corvair ends where it does because that is all rear overhang needed  to
cover the rear engine/rear structure w/bumpers.

I don't have any  info why the Corvair exhaust comes out the side.


Jim,  I will agree that the Corvair doesn't have a true Kamm  back.  But I'm 
not dealing in absolutes (though in my younger days I might  have).  But any 
squared off rear has a similar, but smaller effect  depending on its size.  GM 
recognized this and moved the exhaust to the  side.  I believe the LM had an 
easier time of it because they moved the  intake ahead of the engine deck just 
behind the rear window (why would they do  that?).  But as you have said the 
leaking oil expelled from the hot cooling  air does end up on the flat rear of 
the car because of the  aerodynamics of the car.  I had a '66 Monza 
convertible twenty years  ago with an engine that burned a lot of oil and even though I  
thoroughly sealed the engine so no oil leaked the rear of the car stayed  
oily just from the bluish exhaust exiting the stock GM muffler.   Our church's 
venerable 15 passenger van without a true Kamm back is flat enough  to create a 
low pressure area that holds exhaust and has a sticker warning on  the rear 
window and in the owner's manual that the rear window is not to be open  when 
the van is in motion.  And the exhaust is to the side.  Follow a  pickup truck 
in foggy weather and watch the rear end to see the same  thing.
 
Bob Hall
Group Corvair
Washington DC Suburbs
'64 Brier
'65 Corsa
2 '68 Monzas
 
 



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