<VV> Not expected to last

[ScottyGrover at aol.com]

In a message dated 3/6/2008 1:15:06 P.M. Pacific Standard Time,  
JVHRoberts at aol.com writes:

Answer?  Look at how the last of the air cooled 911 engines were made. 


In a  message dated 3/6/2008 2:15:00 PM Eastern Standard Time,   
ScottyGrover at aol.com writes:

Ken,
If you were designing the  Corvair in present time, what  aluminium alloy  
would you use  for the cylinder head; or for that  matter, would you still 
use  

cast-iron for the cylinders, or some  kind of specially  heat-treated  
aluminium?

Scotty from   Hollyweird



Now John, you know that I've seen pictures of the 911 head (I think it was  
you that sent them to me) but I don't know what alloy was used in their  
manufacture.  And I was trying to get a serious answer as to what would be  used in 
2008 to do the design if someone was re-designing the Corvair  engine.   I do 
know that air-cooled engines give engineers fits  trying to set up a 
pre-ordained memory map for the ECU, that's why they aren't  made by VW or  Porsche. 
But that's not the only way to use digital  technology for modern EFI; an 
analogue-to-digital converter following analogue  processing of the data from an 
air-flow sensor, temperature and pressure  sensors, then digital processing using 
a narrow-band oxygen sensor to set up  pulse-width modulation of an injector 
system with a series of down-counters (one  for each cylinder.) This has been 
done without microcontrollers but would be  more parts-efficient using a micro.
 
Scotty from Hollyweird (with multiple  breadboards)



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