If I remove my cat's....
Thread Starter
Instructor
Joined: Jul 2000
Posts: 168
Likes: 0
From: Memphis, TN.
If I remove my cat's....
If I remove my cats will I need O2 sensors for sure? I have a friend that owns a muffler shop and he fabracated some pieces to do my own A&A exhuast mod. But while I was there I was thinking of removing the cats. And just putting a pieced of pipe there. My 99 M6 Coupe has 2 cats, if I replace them with just a piece of pipe will I need the O2 sensors and what will happen if I don't use them or till I can get them? Also is there any loss of torque without the cats?
Clint
Clint
Le Mans Master
Joined: Nov 2000
Posts: 7,294
Likes: 1
From: Coral Springs Florida
Re: If I remove my cat's.... (Big Casino)
Yes ..you WILL need (2) 02 simulators...several vendors on this forum sell them. Breathless Performance sells them and the exhaust is already prefab for the install.. but ...Pull the cats! They are dead weight! :yesnod:
Melting Slicks
Joined: Jul 2001
Posts: 2,188
Likes: 0
From: not speeding just flying low
Re: If I remove my cat's.... (Big Casino)
You don't need your O2 simulators if you have your computer reprogrammed. Obviously the O2 sims are a much cheaper alternative though. If you don't immediatly put in the sims or reprogram the computer you will throw a check engine code. It will not hurt anything, except maybe the environment. :lol: <---But that's debatable. I would just buy the sims unless you are planning on having some tuning done. Good luck.
[Modified by SAXN8R, 8:59 PM 8/18/2002]
[Modified by SAXN8R, 8:59 PM 8/18/2002]
Thread Starter
Instructor
Joined: Jul 2000
Posts: 168
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From: Memphis, TN.
Re: If I remove my cat's.... (vstella)
Woo $199 is there a cheaper place. I got some for my Mustang and they were like $40 or $50 bucks!
From you guys that have removed them what are the horsepower gains from pulling the cats? Keep quite you Tree Huggers :nono:
Thanks for the input guys
From you guys that have removed them what are the horsepower gains from pulling the cats? Keep quite you Tree Huggers :nono:
Thanks for the input guys
Le Mans Master
Joined: Aug 2001
Posts: 6,071
Likes: 297
From: Savannah GA
Cruise-In IV Veteran
Re: If I remove my cat's.... (Big Casino)
Keep quite you Tree Huggers :nono:
My exhaust note only slightly got louder but I am using the RT. 66 exhaust. It sounds awesome at WOT! I would not trade it for any exhaust in the world. + the console inside and when I open the doors feels much cooler. Of course the cats build up alot of heat from the chemical reactions...
Got to do some tuning to pick up power in most cases.
Supporting Vendor
Joined: Jan 2000
Posts: 5,683
Likes: 14
From: TX
Cruise-In I Veteran
St. Jude Contributor '04
Re: If I remove my cat's.... (Big Casino)
we have the 02 Simms listed for 119.00 and in stock. 7hp gain is the average gain for no cats and minor mods...i personally do not think its worth the smell, the noise for the power gained. (cant believe i said that! i must be getting old!)
Nate
Nate
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Verdad Gallardo
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Re: If I remove my cat's.... (Big Casino)
Woo $199 is there a cheaper place. I got some for my Mustang and they were like $40 or $50 bucks!
From you guys that have removed them what are the horsepower gains from pulling the cats? Keep quite you Tree Huggers :nono:
Thanks for the input guys
From you guys that have removed them what are the horsepower gains from pulling the cats? Keep quite you Tree Huggers :nono:
Thanks for the input guys
http://www.met-electronics.net/
Drifting
Joined: Aug 2000
Posts: 1,698
Likes: 1
From: Chapin SC
Cruise-In II Veteran
Cruise-In III Veteran
Re: If I remove my cat's.... (chuckster)
Check out this post in this same section: "Offroad vs Random Tech 3" high flow on big motor". Granted this is on a 436" motor but the gains were significant. The Mufflex web site shows dyno graphs on a standard C5 before and after removal of the cats. They picked up 10 rwhp/rwt across the power band. There was no loss of torque. I picked up 25/21, nowhere in the power band was there a loss. My O2 simulators cost $75.00 for the pair, Mufflex supplied them at cost. I'm still using the stock mufflers, the noise level is just about perfect.
Thread Starter
Instructor
Joined: Jul 2000
Posts: 168
Likes: 0
From: Memphis, TN.
Re: If I remove my cat's.... (chuckster)
Race Director
Joined: Jan 2000
Posts: 15,707
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From: Lynnfield MA
Cruise-In II Veteran
Cruise-In III Veteran
Cruise-In VI Veteran
Re: If I remove my cat's.... (Big Casino)
From my recollection, if you have a 99 vette, I don't think that you will need the O2 sensors... Possible a header manufacturer could chime in here.
Le Mans Master
Joined: Nov 1999
Posts: 7,695
Likes: 51
From: Imperial Beach CA
Re: If I remove my cat's.... (Smoke-N-Shot)
Before you totally jump off the deep end. Two guys from our last two dyno days got no gains at all without he cats. In fact last months dyno day the one I just spoke of had some exhaust mods also and was 8 rwhp less than before. Sound was a bit throatier but that was it. I guess it's the old race line, if it don't go Chrome it.
Thread Starter
Instructor
Joined: Jul 2000
Posts: 168
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From: Memphis, TN.
Re: If I remove my cat's.... (jimman)
Before you totally jump off the deep end. Two guys from our last two dyno days got no gains at all without he cats. In fact last months dyno day the one I just spoke of had some exhaust mods also and was 8 rwhp less than before. Sound was a bit throatier but that was it. I guess it's the old race line, if it don't go Chrome it.
I am mainly doing it for sound, and if it makes the car lighter and more hp, then that is a PLUS
Thread Starter
Instructor
Joined: Jul 2000
Posts: 168
Likes: 0
From: Memphis, TN.
Re: If I remove my cat's.... (Smoke-N-Shot)
From my recollection, if you have a 99 vette, I don't think that you will need the O2 sensors... Possible a header manufacturer could chime in here.
Burning Brakes
Joined: Feb 2001
Posts: 929
Likes: 0
From: Dallas TX
Re: If I remove my cat's.... (Big Casino)
You will need them if you take the cats off. If your car has sensors downstream of the cats, which it does, you need them. I had the MET sensors and they worked great.