Cats or no cats?
Thread Starter
Supporting Vendor
Joined: Sep 2007
Posts: 11,216
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From: Pensacola Florida GO GATORS!!! www.rlsebring.com www.c6c7vette.com
St. Jude Donor '17
Cats or no cats?
I have an 08 project where I am putting in a LS376/480hp motor. I was just informed that The cats I planned on using are no good. Other than the Federal part what problems can I expect if I use the LG pipes to bypass or "test" the converters? If there are any problems what can I do to rectify them?
Melting Slicks
Joined: Feb 2004
Posts: 3,307
Likes: 111
From: Tucson AZ
Your engine control system uses two O2 sensors per side, one in front and one behind the catalytic converter. The rear one is monitored to determine the health of the cat. When the cat comes up to temp and lights off, it burns everything left in the exhaust and the rear O2 output is flat. Without a cat, its output will not be flat, but will vary just like the front O2 sensor and your ECU will set a code. This can easily be locked out by a tuner or even locked out with a handheld Predator.
The other problem you may encounter is excessive fumes in the cockpit. Some are more sensitive than others and say it is terrible, while others say it is not that bad.
Another alternative is to install hi-flow cats in an aftermarket X pipe that will not restrict exhaust flow or inhibit power.
The other problem you may encounter is excessive fumes in the cockpit. Some are more sensitive than others and say it is terrible, while others say it is not that bad.
Another alternative is to install hi-flow cats in an aftermarket X pipe that will not restrict exhaust flow or inhibit power.
Thread Starter
Supporting Vendor
Joined: Sep 2007
Posts: 11,216
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From: Pensacola Florida GO GATORS!!! www.rlsebring.com www.c6c7vette.com
St. Jude Donor '17
Your engine control system uses two O2 sensors per side, one in front and one behind the catalytic converter. The rear one is monitored to determine the health of the cat. When the cat comes up to temp and lights off, it burns everything left in the exhaust and the rear O2 output is flat. Without a cat, its output will not be flat, but will vary just like the front O2 sensor and your ECU will set a code. This can easily be locked out by a tuner or even locked out with a handheld Predator.
The other problem you may encounter is excessive fumes in the cockpit. Some are more sensitive than others and say it is terrible, while others say it is not that bad.
Another alternative is to install hi-flow cats in an aftermarket X pipe that will not restrict exhaust flow or inhibit power.
The other problem you may encounter is excessive fumes in the cockpit. Some are more sensitive than others and say it is terrible, while others say it is not that bad.
Another alternative is to install hi-flow cats in an aftermarket X pipe that will not restrict exhaust flow or inhibit power.
That pretty much answers my question. I was just looking for an easy out and had the pipes available. Is the fit of cats pretty much the same among the vettes or are they year model dependant. ie all C6 fit any or will I have to look for a particular year?
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
It all depends, each person has their own preferences.
Some people like cats and some poeple like dogs, some are even allergic to cats and therefor cannot own cats but then their wife might be a cat person so this causes a dilemma. But if you're A dog person you will always be...oh, wait a minute, you meant, umm, oh nevermind.
Some people like cats and some poeple like dogs, some are even allergic to cats and therefor cannot own cats but then their wife might be a cat person so this causes a dilemma. But if you're A dog person you will always be...oh, wait a minute, you meant, umm, oh nevermind.
Thread Starter
Supporting Vendor
Joined: Sep 2007
Posts: 11,216
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From: Pensacola Florida GO GATORS!!! www.rlsebring.com www.c6c7vette.com
St. Jude Donor '17
It all depends, each person has their own preferences.
Some people like cats and some poeple like dogs, some are even allergic to cats and therefor cannot own cats but then their wife might be a cat person so this causes a dilemma. But if you're A dog person you will always be...oh, wait a minute, you meant, umm, oh nevermind.
Some people like cats and some poeple like dogs, some are even allergic to cats and therefor cannot own cats but then their wife might be a cat person so this causes a dilemma. But if you're A dog person you will always be...oh, wait a minute, you meant, umm, oh nevermind.
Funny, Don't give up your day job...
Burning Brakes
Joined: Jan 2005
Posts: 1,027
Likes: 2
From: Baltimore MD
St. Jude Donor '08
Would also depend on whether you have to deal with emissions testing.
I do have to deal with emissions so its not worth the risk to me for the couple extra HP you get without cats.
I do have to deal with emissions so its not worth the risk to me for the couple extra HP you get without cats.
Thread Starter
Supporting Vendor
Joined: Sep 2007
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From: Pensacola Florida GO GATORS!!! www.rlsebring.com www.c6c7vette.com
St. Jude Donor '17
I picked a pair of cats this morning. I was not sure what effect the cats had on the corvettes. I haven't messed with that part of the car to know how the computer factored in as well trouble codes. I've seen plenty of exhaust systems with no cats and wondered what else they had to do to keep everything operating properly. Sounds like more than I want to mess with at this time. Thanks for the input.
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Melting Slicks
Joined: May 2006
Posts: 2,891
Likes: 1
From: NJ..."the way I saw it, everyone takes a beating sometimes."
It all depends, each person has their own preferences.
Some people like cats and some poeple like dogs, some are even allergic to cats and therefor cannot own cats but then their wife might be a cat person so this causes a dilemma. But if you're A dog person you will always be...oh, wait a minute, you meant, umm, oh nevermind.
Some people like cats and some poeple like dogs, some are even allergic to cats and therefor cannot own cats but then their wife might be a cat person so this causes a dilemma. But if you're A dog person you will always be...oh, wait a minute, you meant, umm, oh nevermind.
Marc, for the first couple of lines I didn't know where the hell you were going with that.....
Burning Brakes
Joined: Aug 2007
Posts: 1,038
Likes: 0
From: fremont Ca
no cats here and will never put them back on. they go well with b&b bullets and headers 
so far i have received 2 violation letters from my HOA for "reving loud engine" in the morning when i leave for work. sad part is im not reving just idling hahaha
so far i have received 2 violation letters from my HOA for "reving loud engine" in the morning when i leave for work. sad part is im not reving just idling hahaha
Pro
Joined: Oct 2003
Posts: 639
Likes: 0
From: springfield missouri
