REFLECTOR: Prudhomme Alternate Air

doug.holub at tx.rr.com doug.holub at tx.rr.com
Sun Jul 20 20:26:35 CDT 2008


The other advantage is that even the alternate air would be filtered.
---- KMis178813 at aol.com wrote: 
> Andy
>    I just got done working with one of Prudhomme's setup. I had  the same 
> conclusion BUT when looking inside the filter housing it all became  clear. He 
> places walls on both sides of the alternate air door all the way to  the filter. 
> In doing so the normal induction air can not go through the part of  the air 
> filter that is saved for alternate air source only. It actually looks  like it 
> worked, according to the dirt in the filter. A plus for this setup is  that 
> when you need alternate air because of ice, the air would be pulled from  the 
> warm engine compartment.
>        Ken Mishler
>  
>  
> In a message dated 7/20/2008 12:57:42 P.M. Eastern Daylight Time,  
> amillin at sbcglobal.net writes:
> 
> I have  been looking at the pictures of Jean Prudhomme's setup.  It is  pretty
> impressive.
> 
> Thanks for the link  Doug!
> 
> http://www.tvbf.org/gallery/?dir=engines%2Fplenum_jean_prudhomme
> 
> I  have a question (of course)
> 
> My understanding of Alernate Air is that it  provides the engine with air
> should the filter become clogged with ice,  snow or other debris.
> 
> If this is the reason for having it, then it  makes sense to me that the
> alternate air port must be AFTER the  filter.  Prudhomme's alternate is on
> the same side of the filter as  the primary intake.  If the alternate air is
> on the same side as the  intake air, wouldn't it be as useless as the
> original intake?  Filter  is clogged, the engine can't pull from Prudhomme's
> alternate any more than  from the  primary...
> 
> Andy
> 
> 
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