Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

Removing Cats

Thread Tools
 
Search this Thread
 
Old Jun 21, 2005 | 05:54 PM
  #1  
the convert's Avatar
Thread Starter
Teching In
 
Joined: May 2005
Posts: 22
Likes: 0
From: Wilkesboro, NC
Default Removing Cats

OK I'm sure this has been asked before but I could never find a definite answer using the search feature . If I remove my cats will there be any ill effects other than an SES light? Also on a car with a cutout what kind of gains can I expect? Thanks and I'm sorry for bringing up a topic thats been discussed 500000 times.
Cameron
Reply
Old Jun 21, 2005 | 06:04 PM
  #2  
conan's Avatar
TECH Senior Member
20 Year Member
iTrader: (5)
 
Joined: May 2004
Posts: 6,492
Likes: 6
From: Back in the Burg
Default

Do you plan on doing LT'S it the future? I would say leave the cats get a cut out or a high flowing cat back. You will see no gains just removing the cats, the exhaust restriction is your manifolds. just my .02

Last edited by conan; Jun 21, 2005 at 06:10 PM.
Reply
Old Jun 21, 2005 | 06:06 PM
  #3  
blkZ28spt's Avatar
11 Second Club
 
Joined: Feb 2003
Posts: 5,524
Likes: 1
From: The South
Default

Nothing other than SES light, which can be turned off with tuning, hand held programmer or O2 sims. It won't sound very good with a cutout though, IMO. Minimal gains, maybe 5 rwhp MAX.

Last edited by blkZ28spt; Jun 21, 2005 at 06:19 PM.
Reply
Old Jun 21, 2005 | 06:16 PM
  #4  
Tranzaman00's Avatar
TECH Resident
 
Joined: Jul 2004
Posts: 813
Likes: 0
From: It's hard work to look this good
Default

Loss of low end torque, bottom of first gear wont want to get out of the hole. This is my expierience with stock manifolds ory pipe and magnaflow. Sounds killer though. You can make the torque back up in other areas I'm sure. Even with the loss of a little torque I'll never put them back on.
Reply
Old Jun 21, 2005 | 06:17 PM
  #5  
Tranzaman00's Avatar
TECH Resident
 
Joined: Jul 2004
Posts: 813
Likes: 0
From: It's hard work to look this good
Default

Oh, I see your in Wilkesboro, cool.
Reply
Old Jun 21, 2005 | 09:39 PM
  #6  
the convert's Avatar
Thread Starter
Teching In
 
Joined: May 2005
Posts: 22
Likes: 0
From: Wilkesboro, NC
Default

Originally Posted by Tranzaman00
Oh, I see your in Wilkesboro, cool.
Yea man, where is Oak Island at? Outer banks i would assume. Well the main reason I would be removing my cats is because I'm pretty sure there clogged up. My car has 90,000 miles on it and sometimes while going down the road a horrible smell will get in my car, like rotten eggs and I've heard this is a sign of clogged cats. I do plan on getting long tubes but it will be atleast several months before i do that.

Edit: Tranzaman, do you just have the magnaflow muffler or the whole cat back? I see in your profile it says custom can you explain?
Reply
Old Jun 22, 2005 | 11:00 AM
  #7  
Flawless's Avatar
On The Tree
 
Joined: Feb 2004
Posts: 162
Likes: 0
Default

Taking off my cats brought up some engine codes and the check engine light. I need to get some O2 sims.
Reply
Old Jun 22, 2005 | 11:10 AM
  #8  
WS6FirebirdTA00's Avatar
TECH Senior Member
20 Year Member
iTrader: (33)
 
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
Default

you are in NC? drive down here if u take the cats off and have 99 or 2000 and i can turn the codes off for you, sims are a waste when you can have someone turn them off
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Jun 22, 2005 | 04:28 PM
  #9  
Tranzaman00's Avatar
TECH Resident
 
Joined: Jul 2004
Posts: 813
Likes: 0
From: It's hard work to look this good
Default

Originally Posted by the convert
Yea man, where is Oak Island at? Outer banks i would assume. Well the main reason I would be removing my cats is because I'm pretty sure there clogged up. My car has 90,000 miles on it and sometimes while going down the road a horrible smell will get in my car, like rotten eggs and I've heard this is a sign of clogged cats. I do plan on getting long tubes but it will be atleast several months before i do that.

Edit: Tranzaman, do you just have the magnaflow muffler or the whole cat back? I see in your profile it says custom can you explain?

no,further south real close to wilmington, nc. 45 mins. from myrtle.
The reason it is custom is because I bought the 5x8x14 stainless muffler which is 4'' smaller than the one that comes with the catback. Smaller is louder. This is the same muffler they use for the v6 f-body catback. I talked to the guys at magnaflow and the reason they use the smaller on on the v6 is to make it a little louder. I mean lets be honest anytime someone puts a aftermarket muffler on a v6 is cause they are looking for that v8 sound. It sounds mean as hell. One of the loudest non-true dual systems I've heard.
The y-pipe is custom made as well using a magnaflow tru y-merger. Some people have cut the y's out of there pipes and replaced with the flowmaster y, I decided to keep it all magnaflow. It sayas 5x8x18 but thats wrong and it is not a mufflex ory it is mufflex off-road pipes to a custom wye pipe .you can hear it here.http://www.ls1sounds.com/magnaflow/m...Y_flamesTA.MOV

Last edited by Tranzaman00; Jun 22, 2005 at 04:45 PM.
Reply
Old Jun 22, 2005 | 04:47 PM
  #10  
Tranzaman00's Avatar
TECH Resident
 
Joined: Jul 2004
Posts: 813
Likes: 0
From: It's hard work to look this good
Default

I will be selling this soon as well to go TD's.
Reply
Old Jun 22, 2005 | 07:10 PM
  #11  
the convert's Avatar
Thread Starter
Teching In
 
Joined: May 2005
Posts: 22
Likes: 0
From: Wilkesboro, NC
Default

My car is a 98 so I guess you couldn't turn the codes off could you? I've already got one from my AIR system being removed by the previous owner so I'm going to have to get it done in the next year or so before they start doing emissions up here. Is Oak Island near Whiteville? One of my friends dad lives there so we went through there on the way to Myrtle Beach about a week ago.
Reply
Old Jun 22, 2005 | 07:20 PM
  #12  
Tranzaman00's Avatar
TECH Resident
 
Joined: Jul 2004
Posts: 813
Likes: 0
From: It's hard work to look this good
Default

Originally Posted by the convert
My car is a 98 so I guess you couldn't turn the codes off could you? I've already got one from my AIR system being removed by the previous owner so I'm going to have to get it done in the next year or so before they start doing emissions up here. Is Oak Island near Whiteville? One of my friends dad lives there so we went through there on the way to Myrtle Beach about a week ago.
Yeah it's about 25 mins. away. However it is the other guy that can do the tuning. look up a couple posts. I am pretty sure that he can't do yours.
Reply
Old Jun 22, 2005 | 08:02 PM
  #13  
WS6FirebirdTA00's Avatar
TECH Senior Member
20 Year Member
iTrader: (33)
 
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
Default

im from the charlotte area, i dont have the software for 98 but if i could find someone else to go in on it with you i will if you would want to, its 199 bucks, but of course the only charge would be for the software, not for me tuning it, i only know 2 guys with 98's though one is now in jersey and the other is in japan for a while, lol
Reply
Old Jun 22, 2005 | 11:01 PM
  #14  
the convert's Avatar
Thread Starter
Teching In
 
Joined: May 2005
Posts: 22
Likes: 0
From: Wilkesboro, NC
Default

So HPtuners or whatever is only $200 for my car? I may consider buying that in the near future and getting you to help me out with it. By the way are you going to the F-body thing there having at Mooresville this weekend?

edit: Tranzaman your car sounds badass

Last edited by the convert; Jun 22, 2005 at 11:21 PM.
Reply




All times are GMT -5. The time now is 09:11 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE