C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

gutted my cats...

Thread Tools
 
Search this Thread
 
Old Jun 26, 2003 | 02:37 PM
  #1  
ICULUKN-C5's Avatar
ICULUKN-C5
Thread Starter
Le Mans Master
20 Year Member
 
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
Default gutted my cats...

gutted my cats... got it retuned and picked up 11 RWHP.
:steering:
Reply
Old Jun 26, 2003 | 02:52 PM
  #2  
cfi_luz's Avatar
cfi_luz
Drifting
15 Year Member
 
Joined: Jun 2003
Posts: 1,748
Likes: 0
From: CA
Default Re: gutted my cats... (ICULUKN-C5)

Now, the big question, how does it sound? I know on other cars it made a huge difference in volume, just wondering if it had the same effect on the corvettes?
Reply
Old Jun 26, 2003 | 03:00 PM
  #3  
ryan0's Avatar
ryan0
Melting Slicks
20 Year Member
 
Joined: Apr 2003
Posts: 2,422
Likes: 14
From: 2” off your rear bumper
Default Re: gutted my cats... (ICULUKN-C5)

pre-cats?.. main-cats?... both?

Reply
Old Jun 26, 2003 | 03:05 PM
  #4  
AFVETTE's Avatar
AFVETTE
Team Owner
20 Year Member
 
Joined: Sep 1999
Posts: 20,054
Likes: 44
From: Swansea IL
Default Re: gutted my cats... (ICULUKN-C5)

Why not some High Flow cats like Random Technology? Seems you can have your higher exhaust flow and be legal.

Tom
Reply
Old Jun 26, 2003 | 03:05 PM
  #5  
Buckmaster's Avatar
Buckmaster
Team Owner
 
Joined: Jun 2000
Posts: 37,636
Likes: 0
From: Just trying to make it through each day.
Cruise-In III Veteran
Cruise-In V Veteran
St. Jude Donor '03-'04
Default Re: gutted my cats... (ICULUKN-C5)

Man, I couldn't stand the smell :U Cruising it wasn't too bad but at idle warming up or at a light or stop sign it was sickening. Then if you went out somewhere your clothing smelled of gas fumes :( :U

I had Random Tech high flow CATS put on and it is perfect :D
Reply
Old Jun 26, 2003 | 03:19 PM
  #6  
TLewis4095's Avatar
TLewis4095
Le Mans Master
 
Joined: Aug 2001
Posts: 8,145
Likes: 1
From: Bradenton FLORIDA
Default Re: gutted my cats... (ICULUKN-C5)

You will go to emmissions he!! now for sure! :D :lolg: ( I know I did!) :cheers:
Reply
Old Jun 27, 2003 | 01:19 PM
  #7  
ICULUKN-C5's Avatar
ICULUKN-C5
Thread Starter
Le Mans Master
20 Year Member
 
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
Default Re: gutted my cats... (TLewis4095)

I have long tubes, so there is no precats. I gutted the main cats. The car was retuned to go cat less. 10 RWHP isnt bad

Reply
Old Jun 27, 2003 | 01:47 PM
  #8  
AFVETTE's Avatar
AFVETTE
Team Owner
20 Year Member
 
Joined: Sep 1999
Posts: 20,054
Likes: 44
From: Swansea IL
Default Re: gutted my cats... (ICULUKN-C5)

I've driven behind catless vette's. Never again. I got stuck behind one at a stop on a hot St Louis day. I thought I was going to be sick. I don't see why folks thinks this is a GOOD MOD.

Tom
USAF Retired
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

 Michael S. Palmer
story-1

5 Best & 5 Worst Corvette Daily Drivers

 Joe Kucinski
story-2

The Headlights of Every Corvette Generation Explained

 Joe Kucinski
story-3

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-4

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-5

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-6

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-7

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-8

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-9

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
Old Jun 27, 2003 | 01:48 PM
  #9  
97C5ENVY's Avatar
97C5ENVY
Melting Slicks
25 Year Member
 
Joined: May 2000
Posts: 2,974
Likes: 5
From: CenTex Texas
Default Re: gutted my cats... (ICULUKN-C5)

Ummm.......I'm tellin' PETA! :rofl:
.
.
.
.
.
Seriously, you actually picked up 10 rwhp? I ditched my cats and replaced them with an MTI Off-Road X-Pipe and i didn't gain nothing! I mean nothing anywhere on the RPM band. Actually I lost 2 rwhp & 4 rwtq at between 3600- 4400 RPMs.

Here's my graph (The red & blue lines are the two "NO CAT" pulls and the black/green is the full exhaust):




[Modified by 97C5ENVY, 12:50 PM 6/27/2003]
Reply
Old Jun 27, 2003 | 01:50 PM
  #10  
cfi_luz's Avatar
cfi_luz
Drifting
15 Year Member
 
Joined: Jun 2003
Posts: 1,748
Likes: 0
From: CA
Default Re: gutted my cats... (AFVETTE)

I've driven behind catless vette's. Never again. I got stuck behind one at a stop on a hot St Louis day. I thought I was going to be sick. I don't see why folks thinks this is a GOOD MOD.

Tom
USAF Retired
No offense, but are poeple really that sensitive? I really didn't notice a big difference, it smelled a little like fuel at idle, but so does a Harley. Oh well, different strokes I guess.
Reply
Old Jun 27, 2003 | 01:55 PM
  #11  
Face's Avatar
Face
Le Mans Master
15 Year Member
 
Joined: Aug 2000
Posts: 5,294
Likes: 2
From: Suffolk, Long Island NY
Default Re: gutted my cats... (cfi_luz)

I love the smell of no cats. :D :crazy:
Reply
Old Jun 27, 2003 | 02:02 PM
  #12  
2001 Red Coupe Bandit's Avatar
2001 Red Coupe Bandit
Melting Slicks
20 Year Member
 
Joined: Apr 2001
Posts: 2,909
Likes: 1
From: Highland Village TX
Default Re: gutted my cats... (Face)

No Cats will definately pick up HP, but more so TQ. You have to tune your car after you cut the cats off because it usually makes you run rich and when you run rich, you lose hp/tq :yesnod:

No Cats = More HP/TQ and less weight, but you have to ask yourself if the smellis tolerable, if you tune the car perfect, the smell is less noticeable .

Later

The Bandit..............
Reply
Old Jun 27, 2003 | 02:54 PM
  #13  
TLewis4095's Avatar
TLewis4095
Le Mans Master
 
Joined: Aug 2001
Posts: 8,145
Likes: 1
From: Bradenton FLORIDA
Default Re: gutted my cats... (2001 Red Coupe Bandit)

Ummm....taste like chicken! Really, I gained and have no terrible smell....tuning is important. :cheers:
Reply
Old Jun 27, 2003 | 03:14 PM
  #14  
97C5ENVY's Avatar
97C5ENVY
Melting Slicks
25 Year Member
 
Joined: May 2000
Posts: 2,974
Likes: 5
From: CenTex Texas
Default Re: gutted my cats... (2001 Red Coupe Bandit)

No Cats will definately pick up HP, but more so TQ. You have to tune your car after you cut the cats off because it usually makes you run rich and when you run rich, you lose hp/tq
I'm no expert but how does removing the cats affect engine tuning? Afterall it's the "before" O2's that adjust fuel trims. The "after" O2's just monitor cat functionality.
Reply
Old Jun 27, 2003 | 03:20 PM
  #15  
extremecorvette's Avatar
extremecorvette
Drifting
10 Year Member
 
Joined: Feb 2003
Posts: 1,453
Likes: 1
From: Iowa City, IA
Default Re: gutted my cats... (ICULUKN-C5)

How long did it take you?
Reply
Old Jun 27, 2003 | 04:17 PM
  #16  
robsvette's Avatar
robsvette
Safety Car
15 Year Member
 
Joined: Dec 2000
Posts: 3,950
Likes: 32
From: belleville n.j.
Default Re: gutted my cats... (extremecorvette)

i dont smell anything bad in mine and i have been catless for a while now. if the car is tuned right u shouldnt have any smelly problems. believe it or not i passed my inspection
Reply
Old Jun 27, 2003 | 09:35 PM
  #17  
TIKTGTR's Avatar
TIKTGTR
Melting Slicks
20 Year Member
 
Joined: Oct 2002
Posts: 2,151
Likes: 1
From: N.CHARLESTON SC
Default Re: gutted my cats... (robsvette)

:lurk:
Reply

Get notified of new replies

To gutted my cats...

Old Jun 27, 2003 | 09:58 PM
  #18  
WILDONETHIRTYSEVEN's Avatar
WILDONETHIRTYSEVEN
Pro
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Dec 2002
Posts: 622
Likes: 0
From: BOCA RATON FL
Default Re: gutted my cats... (ICULUKN-C5)

Congrats Glenn :hurray:
Reply
Old Jun 27, 2003 | 10:00 PM
  #19  
alexWS6's Avatar
alexWS6
Drifting
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Mar 2002
Posts: 1,613
Likes: 1
Default Re: gutted my cats... (Face)

I love the smell of no cats. :D :crazy:
Me too! Ran my WS6 that way for a long time, sounded great through the corsa. Cant wait to ditch them on the vette. :yesnod: Just hope you dont get stuck behind a catless car at a long light :lol: was behind bigbollas catless FRC on a vette cruise a while back and got choked up a bit :rofl:

Face- love the sig pic dude! :cool:
Reply
Old Jun 27, 2003 | 10:07 PM
  #20  
larrysb's Avatar
larrysb
Race Director
20 Year Member
Active Streak: 30 Days
Community Builder
Community Influencer
 
Joined: Aug 2002
Posts: 16,735
Likes: 1
From: Redacted
Default Re: gutted my cats... (ICULUKN-C5)

Do you have the Dyno Chart?

I've seen more than one before and after that showed no improvement from killing the cats.

I've heard lots of claims of improvement from gutted cats - but not a dyno chart to prove it.

Besides, how much came from the tuning you had done, not just the cat removal?

It seems most folks can get a few ponies from just tuning anyway.
Reply




All times are GMT -4. The time now is 11:07 PM.

story-0
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

Slideshow: Is the 2027 Chevrolet Silverado 1500 the best Silverado yet?

By Michael S. Palmer | 2026-06-16 08:01:12


VIEW MORE
story-1
5 Best & 5 Worst Corvette Daily Drivers

Slideshow: 5 best and 5 worst Corvette daily drivers

By Joe Kucinski | 2026-06-15 10:32:13


VIEW MORE
story-2
The Headlights of Every Corvette Generation Explained

Slideshow: The headlights of every Corvette generation explained

By Joe Kucinski | 2026-06-15 10:17:14


VIEW MORE
story-3
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-4
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-5
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-6
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-7
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-8
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-9
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE