Cherry Red Catalytic Converter

[Braddock]

Can you mark this as resolved?

[asylummotorsports]

I had the bad cat cut off my Quad Beretta and now it sounds like an obnoxious ricer POS!

You need to replace it with something. A cheap glasspack is the easy way out IMHO

On my 3500 there is no cat, but it has two mufflers as part of my "esthetic" dual exhaust, along with the headers which make it noisy in any event.

[LeftVentricle]

I had an '84 6000 with the LE2, and at some point in its life the cat had been hollowed out and the muffler removed. It sounded angry when revved, which I liked, but drone was pretty bad on the highway, which I didn't like. You'll definitely want to keep it quiet, lest you get ticketed for noise ordinance violations.

[Superdave]

It'll be louder but if you have a stock muffler you won't be able to tell too much of a difference.

if it's too loud you can put a glasspack where the cat was, that'll quiet it down a bit.

[Braddock]

Hey will my car sound like shit without a cat? If it does whats the best way to tune the noise down to a lower tone? A resonator or custom muffler?

[Braddock]

Yeah, Replaced with straight pipe. I will be starting car soon.
Thanks guys!

[RedogOnyx]

Cat is clogged, and bad if it's smoking out the carb.

Think of it as being unable to shit

[Superdave]

Yes, your cat is bad, causing all the other problems.

you can usually buy pre-cut pieces of tailpipe at stores like Autozone that are allready expanded on both ends. One of those and 2 clamps will eliminate the cat. You'll need a hacksaw and some beer though.. or a sawzall (and no beer).

[Braddock]

....

[Braddock]

So I wont have to weild it?
Will I need a resonator if i take out my caty converter?
And to confirm;

-Smoke from carb air intake upon turn off of car
-Catalytic converter didnt do this till after I sealed leaks on mating surfaces of exhaust manifold(before that exhaust came out from leaks)
-Engine sounds smooth idling, but when reved a nasty lawnmower sound comes from carb.
-chugging noise from tailpipe
-spark plugs seem fine, no significant indication of rich mixture. however the plugs are relatively new(April) and have about 5000-6000Km on em. And the power loss problem didnt come about until September.



Do any of these give substatial reason to believe that the caty is plugged? Because I dont know if I will still need to work with carb.

[IsaacHayes]

LOL, grab a pipe at a parts store, like $2.50 some $2 clamps and cut it out and clamp it on. Might need to rent a pipe expander from the parts store to expand the other side.

Cause if you cut the pipe to hollow out the cat you will need to re attach it some how anyway. Unless you can get it un bolted. But a pipe will flow better than a hollowed out cat which will cause some turbulence.

[Braddock]

cant really afford another cat, im just wondering what problems could occour if i hollowed out. I cant really even afford to replace with a pipe.

[34blazer]

So I can just hollow it out rather than replace with pipe? Is either method better than the other? Is hollowing it out hard?

id replace it with another cat. then you can take the old one in and get some $$$ for scrap.

[Braddock]

So I can just hollow it out rather than replace with pipe? Is either method better than the other? Is hollowing it out hard?

[34blazer]

yes, my cat clogged on my old s10 and had no power and spit back thru the TB. hollowed it out and was GTG