[V8] Ecu codes, cats
David.Coleman at blackrock.com
Wed Aug 31 09:30:32 EDT 2005
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.
> 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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