Upgrade Catalytic Convertors Question
Thread Starter
Le Mans Master
Joined: Oct 2000
Posts: 6,476
Likes: 711
From: Sausalito CA
Upgrade Catalytic Convertors Question
Will they change the tone of the exhaust?
Will they increase popping or gurgling?
Cartunes brand (I think made by Flowmaster). I can get a good price installed. P.S. I have shorty headers.
Will they increase popping or gurgling?
Cartunes brand (I think made by Flowmaster). I can get a good price installed. P.S. I have shorty headers.
Safety Car
Joined: May 2000
Posts: 4,811
Likes: 344
From: Albuquerque NM
Re: Upgrade Catalytic Convertors Question (Kenny94945)
Something to think about: some folks have had problems passing the smog sniffer test with upgraded cats, they couldn't get them hot enough to light off and work. Also, for for stock to even fairly well modded motors (like mine) the stock cats don't seem to be much of a restriction, so I spent the money on other things, didn't seem worth it to me. :cheers:
Drifting
Joined: Feb 2003
Posts: 1,453
Likes: 1
From: Iowa City, IA
Re: Upgrade Catalytic Convertors Question (Kenny94945)
I hope you don’t mind me ask a question but what about taking the cats off will I fail emissions, and I don’t have to worry about that yet because here in Iowa we don’t have them. Will you loss or gain any hp? Thanks
Thread Starter
Le Mans Master
Joined: Oct 2000
Posts: 6,476
Likes: 711
From: Sausalito CA
Re: Upgrade Catalytic Converters Question (extremecorvette)
Hello extreme,
My understanding of taking off the cats is that HP is available, BUT there is an issue with a smell of gasoline and/or rotten eggs.
The smell is the big issue.
As for smog, at this time in my area no one lifts the car to inspect cats, if they did it would fail visual inspection. However, some have hollowed the cats out which I guess does the same as removing, and still pass visual.
At the tail pipe, with the smog machine inserted fully into the tail pipe and enjoying every minute, I might add, I think it depends on the reading. It could pass...the engine burn so darn clean, I just do not know.
My understanding of taking off the cats is that HP is available, BUT there is an issue with a smell of gasoline and/or rotten eggs.
The smell is the big issue.
As for smog, at this time in my area no one lifts the car to inspect cats, if they did it would fail visual inspection. However, some have hollowed the cats out which I guess does the same as removing, and still pass visual.
At the tail pipe, with the smog machine inserted fully into the tail pipe and enjoying every minute, I might add, I think it depends on the reading. It could pass...the engine burn so darn clean, I just do not know.
