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08-07-2012
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#1 |
 Join Date: Feb 2011
Location: Vicksburg, MS
Posts: 135
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Removing cats
Well, sense I've got to change the oil, I figured I'd remove the cats while I was under the car. I've got Haibeck headers and corsa on my z.
Previous owner gave me a a set of pipes to replace were the catalytic converters usually are. I was wondering if removing the cats could cause any harm to the car, or would I only get a happier car with more noise and hp? 
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[B][U]1991 No. 519[/U][/B] |
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08-07-2012
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#2 |
  
Join Date: Jun 2005
Location: pittsburgh
Posts: 4,632
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Re: Removing cats
shouldn't be an issue
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It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
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08-07-2012
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#3 |
 Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,479
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Re: Removing cats
If you've got a M.H. chip, he can reprogram for a little more hp without the cat. He'll change the air/fuel ratio. We like more hp. -Steve
Assuming you're taking inspection issues into consideration. |
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08-07-2012
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#4 | |
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Join Date: Feb 2011
Location: Vicksburg, MS
Posts: 135
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Re: Removing cats
Quote:
 More power, more smell, more noise, all sounds good to me.
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[B][U]1991 No. 519[/U][/B] |
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08-07-2012
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#5 |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,828
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Re: Removing cats
Removing the cats will probably change the tone of the exhaust a bit (louder, usually), and the exhaust will be a bit smellier than you're probably used to.
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2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold) |
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08-07-2012
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#6 | |
 Join Date: Aug 2006
Location: McLean, VA
Posts: 3,723
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Re: Removing cats
Quote:
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08-07-2012
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#7 | |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,828
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Re: Removing cats
Quote:
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2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold) |
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08-07-2012
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#8 |
Join Date: Aug 2008
Location: Houston 90 Red ZR-1
Posts: 2,320
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Re: Removing cats
For us guys with 90's it's only a little more than two years and we will be exempt from emissions testing. And on that day the cats are coming off. Oh yeah!
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08-07-2012
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#9 |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,723
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Re: Removing cats
Also, I am inclined to believe the cat removal also dropped my coolant temp.I am not positive because I also installed a new 180 thermostat w/ one 1/8" hole. Now in cruise in 90+ temp day the Z runs at about 200. Even in stop and go traffic in90+ day w/ AC running the temp stays around 210 to 212.
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08-08-2012
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#10 |
Join Date: Dec 2005
Location: Tinton Falls, NJ
Posts: 1,177
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Re: Removing cats
I have been running with no cats for about 3yrs now. Marc H. did my car, he said about a 4hp gain. I also have zero issue with any kind of foul odors except burning rubber
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