[V8] Ecu codes, cats

[Coleman, David]

I've witnessed the after-effect of gutted cat on a 5000S, and that
resonating marble-in-a-tin can sound is not what I'm after.  But like
Jason said, sound aside, the 5k did run very well afterward!  Guess I
was wondering if it'd sound different/better out of a V8.   Interesting
stat on the M3 power loss situation -- not the first time I've heard
such a report.

-dc-



> I gutted the cat in my 4kq and found the car sounded like a 
> refrigerator amplified a million times. The hollow cat 
> produced some sort of resonance. Hollowing a cat won't 
> necessarily make more power (unless they were clogged) and 
> metal core catalysts make it almost impossible to gut 
> (ceramic on the other hand is much easier). A friend of mine 
> dynoed his stock 95 M3 before and after he gutted the cat, 
> and it actually lost about 7 horsepower after the kitty was gutless.
> 
> ----- Original Message -----
> From: Jason Wilkerson <wilke_jb at yahoo.com>
> Date: Wednesday, August 31, 2005 6:44 am
> Subject: Re: [V8] Ecu codes, cats
> 
> > David,
> >   Definately gut the cats - they will sound alot different (not 
> > totally a bad thing), and the car will run great, as there is no O2 
> > sensor downstream of the cats.  Do that, then see how it goes from 
> > there.
> > I
> > would say you may have a corroded ground somewhere - those 
> codes don't 
> > just come up for no reason - unless the ecu is fried.
> > 
> >         Good luck,
> >                Jason
> > 
> > 
> > 
> >        	
> > ____________________________________________________
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> > http://www.yahoo.com/r/hs
> > 
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