Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
JDP Motorsports
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Engine | Drivetrain | Powertrain Technical Discussions > Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons

Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

Reply
 
Thread Tools
Old 05-13-2010, 04:56 PM   #1
FeArLeSsInSoCaL
SoCal Mayhem
 
FeArLeSsInSoCaL's Avatar
 
Drives: 2010 Black Camaro 2SS
Join Date: Apr 2010
Location: 310 - WEST COAST
Posts: 308
CAT or NO CAT?????

hey guys, ive been going back and forth on whether to remove my catalytic converter. i hear rumors that it might mess up my computer and the "check engine" light will be on at all times. then ive heard it doesnt affect anything and i will have HP gain and a louder exhaust. if anyone has any intel i would greatly appreciate it.
FeArLeSsInSoCaL is offline   Reply With Quote
Old 05-13-2010, 05:00 PM   #2
Madcat0911
 
Madcat0911's Avatar
 
Drives: 2010 Camaro 1SS/RS
Join Date: Dec 2009
Location: Maryland
Posts: 243
I may be wrong, but I think it's against the law anywhere in the US to remove your catalytic converter...

It'll certainly throw alerts if you're in a state where they check emissions.
__________________
Camaro 1SS/RS, Manual Transmission, BA package, Transformers package
---------------------
Madcat0911 is offline   Reply With Quote
Old 05-13-2010, 05:12 PM   #3
Jekyll-N-Hyde
I put the FU back in FUN
 
Jekyll-N-Hyde's Avatar
 
Drives: 1969 SS 396 , 2010 Camaro SS
Join Date: Jun 2009
Location: Between Weatherford and Azle TX hway730
Posts: 2,139
YES its against the law and no it isnt right.

High Flow Cats have been said to flow just as good as a car with No cats however im sure you are looking at removing your cats for sound purposes and not HP.

If you are like me and Live outside the city limits Cats dont matter.......Do what you want just keep in mind you will add Rasp to the sound of your car.

As for people saying but a car without Cats STINK with a Proper tune your car should not stink what so ever. Just dont dump your exhaust where it is smoldering below your seat run it out the back if you choose to do so.


Yes it is ILLEGAL and if you have to get your car inspected then this is something you need to think twice about unless you have ways of doing that.
Plus keep in mind some folks have sound laws.

Asking someone on here to keep a cat or remove a cat is like asking
whats better automatic or manual

Go with what you want and leave it at that.


Removing a cat will make your car louder for sure just keep in mind with the type of muffler you are running. ( Drone will get louder without cats )

seeing you are in California and with your laws I might think twice.......yes Texas is strict on our Emissions however there is always a way to do something in the Lone Star State....... another reason why no car sounds like a Car from TEXAS. Especially Cars from down in the Houstin/Baytown area.
Jekyll-N-Hyde is offline   Reply With Quote
Old 05-13-2010, 10:23 PM   #4
FeArLeSsInSoCaL
SoCal Mayhem
 
FeArLeSsInSoCaL's Avatar
 
Drives: 2010 Black Camaro 2SS
Join Date: Apr 2010
Location: 310 - WEST COAST
Posts: 308
thanks for the advice guys, really appreciate it...
FeArLeSsInSoCaL is offline   Reply With Quote
Old 05-17-2010, 06:31 PM   #5
Master Shake
 
Drives: Camaro LS
Join Date: Apr 2010
Location: US
Posts: 39
Anyone try a y-pipe setup where you switch between the cat and open pipes -- at least for states that only check your computer (as opposed to a visual inspection)?
Master Shake is offline   Reply With Quote
Old 05-18-2010, 12:57 AM   #6
AlSuwaidi


 
AlSuwaidi's Avatar
 
Drives: BLACK LS3 GCC-Spec
Join Date: Oct 2009
Location: UAE - SHARJAH
Posts: 2,878
i doubt you would get much gain without them...

and your car would stink like a sewer! i hate catless car smells
AlSuwaidi is offline   Reply With Quote
Old 05-18-2010, 06:17 AM   #7
Jekyll-N-Hyde
I put the FU back in FUN
 
Jekyll-N-Hyde's Avatar
 
Drives: 1969 SS 396 , 2010 Camaro SS
Join Date: Jun 2009
Location: Between Weatherford and Azle TX hway730
Posts: 2,139
Quote:
Originally Posted by AlSuwaidi View Post
i doubt you would get much gain without them...

and your car would stink like a sewer! i hate catless car smells
If your car has no cats and you sit at a redlight and you smell your exhaust then you need a GOOD Tune.

I live outside of the city limits so inspections are not a Big thing. I recently installed 1 7/8 longtubes "NOCATS" ARH Xpipe and Borla Stingers and of course TUNED by someone who knows WTF he was doing. I can sit at a Redlight for 4 minutes with the windows down and not smell a thing.
Now yes if you walk to the back of the car and just stand there leaning over DUH yeah you will smell it but it still wont knock you on your A$$.
The only way it should be unbearable is if your car isnt tuned right and you are running real Rich.

Oh and it may not Add Hp hell it may I dont know ( I know I know what Jenetty's test showed ) however it does affect the throttle response because behind my car its Very noticable.


For those of you in the City yeah you may want to run cats only because trying to find someone to inspect your car may be a pain in the A$$.

Last edited by Jekyll-N-Hyde; 05-18-2010 at 06:39 AM.
Jekyll-N-Hyde is offline   Reply With Quote
Old 05-18-2010, 10:30 AM   #8
JEFF2010SSMANUAL
JEFF2010SSMANUAL
 
JEFF2010SSMANUAL's Avatar
 
Drives: IOM 2SS/RS LS3
Join Date: Aug 2008
Location: Northern IL
Posts: 1,953
NO CAT= MORE POLLUTION to the poor Earth.
JEFF2010SSMANUAL is offline   Reply With Quote
Old 05-18-2010, 03:08 PM   #9
2010 SSRS



 
2010 SSRS's Avatar
 
Drives: 3 V8 Camaros
Join Date: May 2009
Location: The Ocean State
Posts: 123,978
High Flow cats
__________________
Jannetty Racing JRE Street Package
2010 SSRS is offline   Reply With Quote
Old 05-18-2010, 04:29 PM   #10
The 2010 Sin
CorkTulsa.com
 
The 2010 Sin's Avatar
 
Drives: 2010 2SS BLK, 2013 2SS CRT
Join Date: Feb 2010
Location: Tulsa, Oklahoma
Posts: 2,849
My car doesnt stink at all unless you bury your face in the tail pipe.. now an old ass motor or a badly tuned motor will smell like you're pouring gas out of the tailpipes, but LS3's and L99's are very efficient in burning up all of the fuel.. reason why they get such good mileage... They dont get such great mileage because they are running rich as all get out.

Do what you want tho. I havent had a problem at all with smell. (If you were wanting to be super green you wouldn't own a Camaro anyway you would own a Prius, am i incorrect?)
__________________
The 2010 Sin is offline   Reply With Quote
Old 05-18-2010, 04:35 PM   #11
LS3SSRS

 
LS3SSRS's Avatar
 
Drives: 2010 IBM SS/RS
Join Date: Oct 2008
Location: Edmonton, Alberta
Posts: 808
Quote:
Originally Posted by FeArLeSsInSoCaL View Post
hey guys, ive been going back and forth on whether to remove my catalytic converter. i hear rumors that it might mess up my computer and the "check engine" light will be on at all times. then ive heard it doesnt affect anything and i will have HP gain and a louder exhaust. if anyone has any intel i would greatly appreciate it.
i recently installed off road downpipes, and this is true. although i dont think it'll 'mess up' the computer.
__________________
2SS/RS, 6spd manual, IBM w/black leather
Blacked out tail/signal lights, 5% rear tint, 20% sides, Dynomax Bullet exhaust, Barton short throw shifter, Clear Image offroad downpipes
LS3SSRS is offline   Reply With Quote
Old 05-18-2010, 04:38 PM   #12
2L82RUN
 
2L82RUN's Avatar
 
Drives: ABM SS/RS
Join Date: Sep 2009
Location: WV
Posts: 580
Quote:
Originally Posted by Jekyll-N-Hyde View Post
If your car has no cats and you sit at a redlight and you smell your exhaust then you need a GOOD Tune.

I live outside of the city limits so inspections are not a Big thing. I recently installed 1 7/8 longtubes "NOCATS" ARH Xpipe and Borla Stingers and of course TUNED by someone who knows WTF he was doing. I can sit at a Redlight for 4 minutes with the windows down and not smell a thing.
Now yes if you walk to the back of the car and just stand there leaning over DUH yeah you will smell it but it still wont knock you on your A$$.
The only way it should be unbearable is if your car isnt tuned right and you are running real Rich.

Oh and it may not Add Hp hell it may I dont know ( I know I know what Jenetty's test showed ) however it does affect the throttle response because behind my car its Very noticable.


For those of you in the City yeah you may want to run cats only because trying to find someone to inspect your car may be a pain in the A$$.


Just went through this same decision. Upgraded to Stainless Works 2" long tubes, Comp G6x3 cam with Borla S catback and tune. After discussing with my speed shop, I opted to go catless. They prefer to tune them without cats and having done several Camaro's, they're experience has been that even thought they may be called hi-flow cats they do cut hp. I've been running without cats for a week now and no ill effects. No CEL or 'sewer' smell. Just a slight rich odor on startup. I have to agree that I can idle at length and unless I stick my nose in the tailpipe I can't smell anything.

Just my .02

JD
2L82RUN is offline   Reply With Quote
Old 05-18-2010, 06:48 PM   #13
Jekyll-N-Hyde
I put the FU back in FUN
 
Jekyll-N-Hyde's Avatar
 
Drives: 1969 SS 396 , 2010 Camaro SS
Join Date: Jun 2009
Location: Between Weatherford and Azle TX hway730
Posts: 2,139
Quote:
Originally Posted by 2L82RUN View Post


Just went through this same decision. Upgraded to Stainless Works 2" long tubes, Comp G6x3 cam with Borla S catback and tune. After discussing with my speed shop, I opted to go catless. They prefer to tune them without cats and having done several Camaro's, they're experience has been that even thought they may be called hi-flow cats they do cut hp. I've been running without cats for a week now and no ill effects. No CEL or 'sewer' smell. Just a slight rich odor on startup. I have to agree that I can idle at length and unless I stick my nose in the tailpipe I can't smell anything.

Just my .02

JD

It will be a week this Friday for me.

If someone lives in the city go with your cats its less of a PIA come inspection time as for me I wont have that problem right now.

the F16's and F35's I help Build Daily and put into the air polute the enviroment a thousand times more than my car hurts the earth.
Jekyll-N-Hyde is offline   Reply With Quote
Old 05-18-2010, 08:10 PM   #14
The 2010 Sin
CorkTulsa.com
 
The 2010 Sin's Avatar
 
Drives: 2010 2SS BLK, 2013 2SS CRT
Join Date: Feb 2010
Location: Tulsa, Oklahoma
Posts: 2,849
Quote:
Originally Posted by Jekyll-N-Hyde View Post

the F16's and F35's I help Build Daily and put into the air polute the enviroment a thousand times more than my car hurts the earth.

Well said, well said...
__________________
The 2010 Sin is offline   Reply With Quote
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
SPINTECH CAT BACK EXHAUST INSTALL/SOUND VIDS 1969to2010 Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 6 03-23-2010 09:02 AM
Cats or Cat delete??? ratlover Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 11 03-14-2010 02:42 PM
Can't Decide on a Cat Back SamSS Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 17 02-17-2010 07:14 AM
Cat delete vs high-flow cat? triq033 Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 5 02-03-2010 03:26 PM
My neighbor's cat better beware when the Camaro arrives! topgun1 5th Gen Camaro SS LS LT General Discussions 42 07-10-2009 10:00 PM


All times are GMT -5. The time now is 01:54 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.