IS GUTTING THE CATS WORTH IT
Thread Starter
Teching In
Joined: Jan 2002
Posts: 31
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From: South Texas
IS GUTTING THE CATS WORTH IT I was thinking is gutting the cats
even worth doing?
What are the advantages and dissavatages
I know for one , it wil be
a little bit hard for some people
to pass the emmissions testing.
But I for one do not have a problem
with that , where I live
IS THIS MOD WORTH ANYTHING ON
AN LS1 F-BODY
ET WISE
THANKS
HELP GREAT APP
even worth doing?
What are the advantages and dissavatages
I know for one , it wil be
a little bit hard for some people
to pass the emmissions testing.
But I for one do not have a problem
with that , where I live
IS THIS MOD WORTH ANYTHING ON
AN LS1 F-BODY
ET WISE
THANKS
HELP GREAT APP
Re: IS GUTTING THE CATS WORTH IT Blackout increased 11 rwhp and 23 rwtq.
I noticed SOTP BIGTIME. Also noticed MAJOR traction loss <img src="graemlins/gr_devil.gif" border="0" alt="[devil]" />
I noticed SOTP BIGTIME. Also noticed MAJOR traction loss <img src="graemlins/gr_devil.gif" border="0" alt="[devil]" />
Re: IS GUTTING THE CATS WORTH IT I gutted the cats on my 2000 WS6 (stock head cam) and picked up 2 rwhp. The drone that came with it was not worth the minimal increase in power. I gutted the 3" cats on my 400 rwhp heads/cam LS1 and picked up 0 rwhp! <img src="gr_images/icons/mad.gif" border="0">
I now hate the sound. In my cases at least, gutting cats did little or nothing.
I now hate the sound. In my cases at least, gutting cats did little or nothing.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Teching In
Joined: Nov 2001
Posts: 23
Likes: 0
From: San Antonio, Tejas
Re: IS GUTTING THE CATS WORTH IT I too would like to know more about this. How bad is the drone I keep hearing about. And how much of a pain in the A$$ was it to do. TIA
<img src="graemlins/gr_hail.gif" border="0" alt="[hail]" />
<img src="graemlins/gr_hail.gif" border="0" alt="[hail]" />
Joined: Nov 2001
Posts: 34,628
Likes: 2,547
From: Schiller Park, ILL Member: #317
Re: IS GUTTING THE CATS WORTH IT This drone and rasp that you get from ORPs is really dependant on your cat back. Some have none, others have a lot. The quieter cat backs don’t really have these issues...
Re: IS GUTTING THE CATS WORTH IT [quote]Originally posted by Z-28Hugger:
<strong>I too would like to know more about this. How bad is the drone I keep hearing about. And how much of a pain in the A$$ was it to do. TIA
<img src="graemlins/gr_hail.gif" border="0" alt="[hail]" /></strong><hr></blockquote>
RPM WS6 is absolutely right. Gutting the cats pretty much accetuates the drone more and just makes your normal exhaust tone louder.
Ergo my LOUDMOUTH <img src="graemlins/gr_devil.gif" border="0" alt="[devil]" /> <img src="graemlins/gr_devil.gif" border="0" alt="[devil]" /> <img src="graemlins/gr_devil.gif" border="0" alt="[devil]" />
If ya like 60's muscle sound . . . and you like to scare EVERYONE on the street to DEATH . . . THIS is the set-up you want <img src="graemlins/gr_devil.gif" border="0" alt="[devil]" />
[ February 11, 2002: Message edited by: The Dragon ]</p>
<strong>I too would like to know more about this. How bad is the drone I keep hearing about. And how much of a pain in the A$$ was it to do. TIA
<img src="graemlins/gr_hail.gif" border="0" alt="[hail]" />
</strong><hr></blockquote>RPM WS6 is absolutely right. Gutting the cats pretty much accetuates the drone more and just makes your normal exhaust tone louder.
Ergo my LOUDMOUTH <img src="graemlins/gr_devil.gif" border="0" alt="[devil]" /> <img src="graemlins/gr_devil.gif" border="0" alt="[devil]" /> <img src="graemlins/gr_devil.gif" border="0" alt="[devil]" />
If ya like 60's muscle sound . . . and you like to scare EVERYONE on the street to DEATH . . . THIS is the set-up you want <img src="graemlins/gr_devil.gif" border="0" alt="[devil]" />
[ February 11, 2002: Message edited by: The Dragon ]</p>
Trending Topics
Re: IS GUTTING THE CATS WORTH IT I went with Straight line performance off road pipes, Hooker weld in muffler.. I do have a little rasp between 2200 and 2500. I have never dynoed the car but once I took the cats out the tires fried alot easier.. I think it was a good gain.. When I open the cut out, it is loud as hell.. <img src="gr_stretch.gif" border="0">
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Re: IS GUTTING THE CATS WORTH IT [quote]Originally posted by RPM WS6:
<strong>This drone and rasp that you get from ORPs is really dependant on your cat back. Some have none, others have a lot. The quieter cat backs don’t really have these issues...</strong><hr></blockquote>
I have to respectfully disagree.I have the SLP Dual/Dual Catback which is one of the quietest catbacks available with the Mac Headers & ORY.The drone at 2200-2600 is terrible.Put a dynomax 16" bullet in the Intermediate pipe.That helped but didn't cure it.With gutted cats & stock manifolds,there was no drone or rasp whatsoever.Just deepened the sound of the dual/dual a bit.
<strong>This drone and rasp that you get from ORPs is really dependant on your cat back. Some have none, others have a lot. The quieter cat backs don’t really have these issues...</strong><hr></blockquote>
I have to respectfully disagree.I have the SLP Dual/Dual Catback which is one of the quietest catbacks available with the Mac Headers & ORY.The drone at 2200-2600 is terrible.Put a dynomax 16" bullet in the Intermediate pipe.That helped but didn't cure it.With gutted cats & stock manifolds,there was no drone or rasp whatsoever.Just deepened the sound of the dual/dual a bit.
Joined: Nov 2001
Posts: 34,628
Likes: 2,547
From: Schiller Park, ILL Member: #317
Re: IS GUTTING THE CATS WORTH IT [quote]Originally posted by AFTICA:
<strong>
I have to respectfully disagree.I have the SLP Dual/Dual Catback which is one of the quietest catbacks available with the Mac Headers & ORY.The drone at 2200-2600 is terrible.Put a dynomax 16" bullet in the Intermediate pipe.That helped but didn't cure it.With gutted cats & stock manifolds,there was no drone or rasp whatsoever.Just deepened the sound of the dual/dual a bit.</strong><hr></blockquote>
I can understand that. <img src="gr_stretch.gif" border="0">
Exhaust tone is very subjective. Everyone’s ear hears it different, and everyone’s impression of what sounds good is somewhat different. That's why it's so hard to give exhaust advice...
<strong>
I have to respectfully disagree.I have the SLP Dual/Dual Catback which is one of the quietest catbacks available with the Mac Headers & ORY.The drone at 2200-2600 is terrible.Put a dynomax 16" bullet in the Intermediate pipe.That helped but didn't cure it.With gutted cats & stock manifolds,there was no drone or rasp whatsoever.Just deepened the sound of the dual/dual a bit.</strong><hr></blockquote>
I can understand that. <img src="gr_stretch.gif" border="0">
Exhaust tone is very subjective. Everyone’s ear hears it different, and everyone’s impression of what sounds good is somewhat different. That's why it's so hard to give exhaust advice...
TECH Resident
Joined: Nov 2001
Posts: 894
Likes: 0
From: Chicago, IL
Re: IS GUTTING THE CATS WORTH IT I've got the LM and when I gutted my cats this spring, it actually lessened the drone to some extent. My cats had "issues" though. Definitely sounds good now though. <img src="gr_stretch.gif" border="0">
Teching In
Joined: Nov 2001
Posts: 33
Likes: 0
From: australia
Re: IS GUTTING THE CATS WORTH IT Thought about this many times. Never done it myself before. what is the best way to remove this bee house stuff ? Guess you guys open them up ? Can it be broken up easily or a hole drilled though it easily ?
I was thinking a couple of 1" holes or so through the middle rather than total removal...
I was thinking a couple of 1" holes or so through the middle rather than total removal...
Teching In
Joined: Jan 2002
Posts: 25
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From: College Park, MD
Re: IS GUTTING THE CATS WORTH IT I helped a friend do it to his jeep, just shoved a crowbar and screwdriver down there until it all came out. If you just drill holes I think pieces might break off and drive you insane with the clanging.
TECH Enthusiast
Joined: Nov 2001
Posts: 603
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From: Houston
Re: IS GUTTING THE CATS WORTH IT [quote]Originally posted by RPM WS6:
<strong>This drone and rasp that you get from ORPs is really dependant on your cat back. Some have none, others have a lot. The quieter cat backs don’t really have these issues...</strong><hr></blockquote>
which catbacks are you talking about!!!
thanks
wayne
<strong>This drone and rasp that you get from ORPs is really dependant on your cat back. Some have none, others have a lot. The quieter cat backs don’t really have these issues...</strong><hr></blockquote>
which catbacks are you talking about!!!
thanks
wayne
Launching!
Joined: Dec 2001
Posts: 204
Likes: 0
From: Salem, NH
Re: IS GUTTING THE CATS WORTH IT I have a set of 2001 factory gutted cats, they are in great shape and would better than hollowing out your own that way you could always put them back if needed, I am selling them for $50, I just figured I bring it up while on the topic. I have a flowmaster in place of my WS6 muffler and with the gutted cats it sounded NICE!, I jut put on some longtubes so I can't use these anymore.
Re: IS GUTTING THE CATS WORTH IT I went 12.07 @ 111 with the stock motor, stock manifolds & Y-pipe (cats included). So.. I say it's not worth the trouble. Save up and get some headers.. then replace the whole y-pipe.
Re: IS GUTTING THE CATS WORTH IT All you guys are talking about sound, I'm talking about power. On a '00-02 F-Body, gutting factory cats is only worth about 1-2 rwhp max...even with a big shot of nitrous. Been there, done that. Sound is worse too.
Now if you swap to headers and a real off road pipe, there's some real power there...but not gutting the factory cats...trust me.
Now if you swap to headers and a real off road pipe, there's some real power there...but not gutting the factory cats...trust me.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Teching In
Joined: Nov 2001
Posts: 23
Likes: 0
From: San Antonio, Tejas
Re: IS GUTTING THE CATS WORTH IT I climbed under my car yesterday to find that I'd have to cut the passengers side cat out gut it and then weld it back in place. Too much <img src="graemlins/gr_bs.gif" border="0" alt="[bullshit]" /> so I'm just gonna wait for headers. Sucks cause I was all set to do it too!
Re: IS GUTTING THE CATS WORTH IT [quote]Originally posted by Patrick G:
<strong>All you guys are talking about sound, I'm talking about power. On a '00-02 F-Body, gutting factory cats is only worth about 1-2 rwhp max...even with a big shot of nitrous. Been there, done that. Sound is worse too.
Now if you swap to headers and a real off road pipe, there's some real power there...but not gutting the factory cats...trust me.</strong><hr></blockquote>
Hoooooooly smack me for bein' stupid Batman!!! <img src="gr_emb.gif" border="0">
I thought we were talkin' about ditchin' the cats <img src="gr_emb.gif" border="0">
My bad Patrick! <img src="gr_emb.gif" border="0">
I FULLY agree with Patrick . . . little to no gain with just doin' half the job <img src="gr_images/icons/wink.gif" border="0">
ORP'S are the only way to go fellas.
Why remove the platinum and leave those crap cats in??
If you get rid of the cleaners . . . might as well go all the way . . . guttin' 'em then leavin' 'em in . . . that's like fly-fishin' <img src="gr_grin.gif" border="0">
<strong>All you guys are talking about sound, I'm talking about power. On a '00-02 F-Body, gutting factory cats is only worth about 1-2 rwhp max...even with a big shot of nitrous. Been there, done that. Sound is worse too.
Now if you swap to headers and a real off road pipe, there's some real power there...but not gutting the factory cats...trust me.</strong><hr></blockquote>
Hoooooooly smack me for bein' stupid Batman!!! <img src="gr_emb.gif" border="0">
I thought we were talkin' about ditchin' the cats <img src="gr_emb.gif" border="0">
My bad Patrick! <img src="gr_emb.gif" border="0">
I FULLY agree with Patrick . . . little to no gain with just doin' half the job <img src="gr_images/icons/wink.gif" border="0">
ORP'S are the only way to go fellas.
Why remove the platinum and leave those crap cats in??
If you get rid of the cleaners . . . might as well go all the way . . . guttin' 'em then leavin' 'em in . . . that's like fly-fishin' <img src="gr_grin.gif" border="0">