Remove the CATs ?
Thread Starter
Race Director
Joined: Oct 2004
Posts: 10,516
Likes: 2
From: Virginia Bch VA
Cruise-In VI Veteran
Cruise-In VII Veteran
St. Jude Donor '06
Remove the CATs ?
Folks,
What are your opinions on removing the CATs. I’m not subject to emission inspection and could get away with making them go away.
1. What are the Pros/Cons?
2. How much additional HP could I expect?
3. Additional sound?
Thanking you in advance.
What are your opinions on removing the CATs. I’m not subject to emission inspection and could get away with making them go away.
1. What are the Pros/Cons?
2. How much additional HP could I expect?
3. Additional sound?
Thanking you in advance.
Instructor
Joined: Apr 2003
Posts: 202
Likes: 0
From: brownstown mi
I did it on my c-5 . I dougth i gain much in horse power.The
sound did get a little louder. I woudn't do it again. The smell can
get all over you .You can't leave car running in garage anymore,
smell get in house.
I would buy a louder exhaust next time.
Greg
sound did get a little louder. I woudn't do it again. The smell can
get all over you .You can't leave car running in garage anymore,
smell get in house.
I would buy a louder exhaust next time.
Greg
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Originally Posted by gppracer
The smell can
get all over you .You can't leave car running in garage anymore,
smell get in house.
Greg
get all over you .You can't leave car running in garage anymore,
smell get in house.
Greg
Roll the car outside, close the garage door, then start it up, that is the only way.
Team Owner
Joined: Jul 2002
Posts: 37,067
Likes: 69
From: This city NEVER sleeps! Frank's back yard!
Originally Posted by Mr Mojo
You shouldn't leave the car running in the garage ever. Not even for a second. Remember Carbon Monoxide is odorless and tasteless.
Roll the car outside, close the garage door, then start it up, that is the only way.
Roll the car outside, close the garage door, then start it up, that is the only way.
WOW - I'm amazed anyone would run their vehicle in a closed garage. WOW. This is how many commit suicide - think about that before you do it next time.
Team Owner
Joined: May 2001
Posts: 36,213
Likes: 2,511
From: ...tearing up the highways, one state at a time™®©
Originally Posted by JFTaylor
Folks,
What are your opinions on removing the CATs. I’m not subject to emission inspection and could get away with making them go away.
1. What are the Pros/Cons?
2. How much additional HP could I expect?
3. Additional sound?
Thanking you in advance.
What are your opinions on removing the CATs. I’m not subject to emission inspection and could get away with making them go away.
1. What are the Pros/Cons?
2. How much additional HP could I expect?
3. Additional sound?
Thanking you in advance.
Under your name, it says you are in Virginia - you must have the car registered out of state then, because even if you kept the car titled down in the Tidewater area, you would still need a VA State inspection yearly - Cat's are looked for
Instructor
Joined: Apr 2003
Posts: 202
Likes: 0
From: brownstown mi
Originally Posted by Mr Mojo
You shouldn't leave the car running in the garage ever. Not even for a second. Remember Carbon Monoxide is odorless and tasteless.
Roll the car outside, close the garage door, then start it up, that is the only way.
Roll the car outside, close the garage door, then start it up, that is the only way.
but even with doors open and tail of car sticking out
that smell get every where.the smell even gets inside
the car when you are driving or stop in traffic.
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Originally Posted by gppracer
i never leave car running with the door closed.
but even with doors open and tail of car sticking out
that smell get every where.the smell even gets inside
the car when you are driving or stop in traffic.
but even with doors open and tail of car sticking out
that smell get every where.the smell even gets inside
the car when you are driving or stop in traffic.
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Melting Slicks
Joined: Feb 2002
Posts: 2,479
Likes: 17
From: Miami Fl
took mine off my C5, definitely got a boost in hp, dynoed 20 more at wheels after doing this alone(with a blower and headers). However since I'm not drag racing much anymore and doing more road work, I wouldn't do it again. The dirt that comes out makes it hard to keep those tail pipes clean and even the rear of the car above the pipes gets very dirty. I agress with getting a louder exhaust next time.
Melting Slicks
Joined: Jul 2001
Posts: 3,284
Likes: 3
From: Southwest Florida
Originally Posted by JerriVette
I would always run catalytic convertors..
For the 5 hp you might gain..not worth it.
For the 5 hp you might gain..not worth it.
I've done it before. Performance gains are negligible and the smell is horrible! It's not just a bad odor; it stings the nose like trying to breathe over a bottle of concrete cleaner (hydrochloric acid).
Mike
Thread Starter
Race Director
Joined: Oct 2004
Posts: 10,516
Likes: 2
From: Virginia Bch VA
Cruise-In VI Veteran
Cruise-In VII Veteran
St. Jude Donor '06
I Surrender
Thanks folks. Ya'll convinced me to leave the CATs in place. Appreciate you taking the time to answer. Thanks again.
Team Owner
Joined: Jan 2004
Posts: 22,185
Likes: 65
From: NJ
Originally Posted by JFTaylor
Folks,
What are your opinions on removing the CATs. I’m not subject to emission inspection and could get away with making them go away.
1. What are the Pros/Cons?
2. How much additional HP could I expect?
3. Additional sound?
Thanking you in advance.
What are your opinions on removing the CATs. I’m not subject to emission inspection and could get away with making them go away.
1. What are the Pros/Cons?
2. How much additional HP could I expect?
3. Additional sound?
Thanking you in advance.
Opinion = Its the first thing a redneck does to his car.
Pros = None
Cons = Loss of backpressure, low end torque, your car is designed/programmed to have them on. Unless you have a real good reason to remove them, dont bother, they dont hurt HP on a lightly modded car anyway.
Additional HP = little to none, at the cost of low RPM torque.
Sound = A little more agressive, but geez, what is this a 72 Nova?
Youre welcome.
Team Owner
Joined: Jan 2004
Posts: 38,772
Likes: 621
From: Boston MA
St. Jude Donor '06-'07-'08,'12-'13
i agree
Originally Posted by Chevy Guy
Opinion = Its the first thing a redneck does to his car.
Pros = None
Cons = Loss of backpressure, low end torque, your car is designed/programmed to have them on. Unless you have a real good reason to remove them, dont bother, they dont hurt HP on a lightly modded car anyway.
Additional HP = little to none, at the cost of low RPM torque.
Sound = A little more agressive, but geez, what is this a 72 Nova?
Youre welcome.
Pros = None
Cons = Loss of backpressure, low end torque, your car is designed/programmed to have them on. Unless you have a real good reason to remove them, dont bother, they dont hurt HP on a lightly modded car anyway.
Additional HP = little to none, at the cost of low RPM torque.
Sound = A little more agressive, but geez, what is this a 72 Nova?
Youre welcome.
Not in mass it wont