<VV> How about the cooling fans from these engines?

[jvhroberts at aol.com]

 Also, we know the Corvair fan is horribly inefficient, and for high perf apps, it just isn't enough. Ask a turbo owner or anyone who really races these things, and they'll all tell you, the stocker just isn't up to the job. 

Hence my reason for suggesting something proven from another application. 

 

John Roberts
 

 

-----Original Message-----
From: Mel Francis <mfrancis at wi.rr.com>
To: jvhroberts <jvhroberts at aol.com>
Cc: virtualvairs <virtualvairs at corvair.org>
Sent: Mon, Jul 29, 2013 4:57 pm
Subject: Re: <VV> How about the cooling fans from these engines?



For the money involved, there's no better fan than the stock Corvair fan and that's not an assumption with no basis. 
If you want to spend thousands of dollars developing a cast adapter for an industrial vane-axial fan to a Corvair engine,
go for it! You will have achieved the same thing as the existing Porsche-style vertical fan setup and that costs hundreds.
 
In its horizontal location, the Corvair fan supplies high pressure air outwardly, directly to the curved 
downturn in the stock upper shroud. This downturn is positioned exactly where it needs to be, in order to direct the 
cooling airflow precisely into the heads at their hottest point, the exhaust valve seat area in the castings.
 
Mel
  
----- Original Message ----- 
  
From:   jvhroberts at aol.com 
  
To: mfrancis at wi.rr.com ; ronh at owt.com 
  
Cc: virtualvairs at corvair.org 
  
Sent: Monday, July 29, 2013 3:40 PM
  
Subject: Re: <VV> How about the   cooling fans from these engines?
  


  
Again, an assumption with no basis. The main reason I posted these is   they are, without a doubt, a LOT more efficient than the Corvair blower simply   because these engines are meant to deliver their rated output continuously.   And that number is WAY higher than the continuous rating of a Corvair engine!   And why stick with the vertical fan axis? This one can be driven without the   twisted belt. 

  


  
John Roberts
  


  


  
-----Original   Message-----
From: Mel Francis <mfrancis at wi.rr.com>
To: Ron   <ronh at owt.com>
Cc: virtualvairs   <virtualvairs at corvair.org>
Sent: Mon, Jul 29, 2013 3:07   pm
Subject: Re: <VV> How about the cooling fans from these   engines?

  
Even if these fans were available for $5 apiece, the main problem would be 
their weight, or rotating mass. GM went to great lengths to develop a 
lighter fan, the magnesium version, that wouldn't cause the Corvair's unique 
twisted-belt system to double up on itself, as badly as with the earlier 
all-steel versions, during quick downshifts.

Mel


----- Original Message ----- 
From: "Ron" <ronh at owt.com>
To: <fastvair at yahoogroups.com>; <virtualvairs at corvair.org>; 
<jvhroberts at aol.com>
Sent: Monday, July 29, 2013 1:55 PM
Subject: Re: <VV> How about the cooling fans from these engines?


> Very nice but there's one important item missing, price!  I assume that 
> they
> are very expensive.
> RonH
>
> ----- Original Message ----- 
> From: <jvhroberts at aol.com>
> To: <fastvair at yahoogroups.com>; <virtualvairs at corvair.org>
> Sent: Monday, July 29, 2013 6:16 AM
> Subject: <VV> How about the cooling fans from these engines?
>
>
>> Note, they turn CCW. And, being continuous duty, I am gathering they have
>> to be efficient, as these engines need to operate for thousands of hours
>> at full power.
>>
>> http://www.deutz.com/live_deutz_products/file/8a85818a11c1035d0111dfea87260238.de.0/obj_doku-33697-001_fl-912-w_ind_en.pdf
>> http://www.deutz.com/live_deutz_products/file/8a85818a11c1035d0111e01be73f0291.de.0/datenblatt+914+bau+en+0603.pdf
>>
>>
>>
>>
>>
>> John Roberts
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