<VV> Catalytic Converter for Corvair

[Bill H.]

                                   B"H

Something occurred to me...couldn't I  install leaner
jets in the carbs?

For most city driving (90% of my driving is city under
30 mph) there is no bad smell whatsoever; when I get
the car up to 50 mph and over, I can smell the rotten
eggs (very slight).

btw the car still runs much better with the cat
installed.  Gas mileage is the same as before.

Thanks guys for your advice...Bill Hershkowitz


--- FrankCB at aol.com wrote:

>  
> Craig is correct.  The catalyst will overheat  and
> the converter will clog.  
> I wouldn't use a catalytic converter on a  Corvair
> unless it had a carefully 
> calibrated EFI system already installed to  maintain
> the A/F at stoichiometric 
> (or leaner) most of the time.
>     Besides, where do you live that your Corvair has
> to  pass a State (or 
> local) emission test?
>     Frank Burkhard
>  
>  
> In a message dated 3/25/2008 2:06:10 AM Eastern
> Daylight Time,  
> nicolcs at aol.com writes:
> 
> Craig  opines:
> The typical catalytic converter converts CO and HC
> to CO2 and H20,  assuming
> the components are fed from an engine that's running
> neither rich  nor lean
> but in exact 14.8:1 ratio of fuel to air.  Corvairs
> are not  calibrated to
> run at this stoichiometric ratio.  Usually, they are
>  relatively rich.  This
> puts the cat into the business of burning the 
> excess HC, which is what
> creates the "rotten egg" smell (H2SO4?).   After a
> steady diet of excessive
> HC, the catalyst's substrate will melt,  fuse, and
> clog the exhaust.  There's
> also a fire hazard, especially  when they're fed
> excess HC, which is why cats
> have a heat shield on the  upper side. Excessive
> backpressure can burn
> exhaust valves too. 
> 
> '68  and '69 smog engines might have the best chance
> of all years for this  to
> work 'cause the carburetors have more accurate
> mixture control.   Since
> you're a pioneer, keep us posted!  The only other
> Corvair I've  heard of with
> a cat has a 4.3V6!
> Craig Nicol
> 
> 
> 
> 
> 
> 
> 
> **************Create a Home Theater Like the Pros.
> Watch the video on AOL 
> Home.      
>
(http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom00030000000001)
> 



      ____________________________________________________________________________________
You rock. That's why Blockbuster's offering you one month of Blockbuster Total Access, No Cost.  
http://tc.deals.yahoo.com/tc/blockbuster/text5.com