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09-29-2014, 07:46 PM
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#1 |
 Drives: 2013 Summit White ZL1 Join Date: Jun 2014
Location: Peotone, IL
Posts: 106
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Back Pressure question
So I'm running stock headers, stock cats, and no mufflers, f8 fuse pull. My drivers side cat let go this morning and is now fluttering. I took it to the dealer and they said because of having no back pressure because no mufflers that it caused the cat to fail. So no warranty. Are they right? I was also just gonna get catless jba midpipes. Is back pressure an issue. Car will get tuned to delete cel and adjust for exhaust flow at low end.
Brandon |
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09-29-2014, 07:51 PM
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#2 |
      
Drives: 2011 Camaro 2SS/RS Convertible and: Join Date: May 2014
Location: Central Texas
Posts: 1,863
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Yeah, warranty voided.
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Currently in my Garage: 2011 Camaro 2SS/RS Convertible | 1980 Corvette Stingray | 1981 Firebird | 1968 El Camino | 2007 Crown Vic Police Interceptor | 2001 Silverado | 2001 Blazer | 1965 Chevy C-10 | 2007 Harley Softail Custom | 2013 MX-5 in Copper Red Mica | 2000 Corvette Convertible | 2010 Corvette Grand Sport | 2006 Audi A3 Turbo | 2008 BMW 328i  |
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09-29-2014, 09:33 PM
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#3 | |
 Drives: chevy corvette Join Date: Apr 2014
Location: Nebraska
Posts: 77
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09-29-2014, 10:01 PM
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#4 |
Drives: 02 Z06, 95 Trans Am, 2012 ZL1 Join Date: Mar 2012
Location: Southeast
Posts: 1,838
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All you did was pull the fuse? First of all I wouldn't have volunteered that info to them. Second, no way in hell did that cause the failure. Third, cats are covered under federally mandated warranty to 80K miles. Take it to another dealer. They are required to cover it.
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 Bryan 2018 ZL1 M6 |
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09-29-2014, 10:18 PM
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#5 |
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Drives: '12 Camaro ZL1, '16 Silverado Z71 Join Date: Mar 2012
Location: Blaine, MN
Posts: 846
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The exhaust is designed to open up at the highest exhaust pressures...thus reducing back pressure by design. Your dealer is an idiot.
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09-29-2014, 10:19 PM
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#6 |
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Drives: none Join Date: Aug 2011
Location: DFW area
Posts: 1,844
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I wouldn't expect a muffler delete to void the warranty on the cats?
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09-29-2014, 10:31 PM
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#7 |
 Drives: 2013 Camaro ZL1 Join Date: Dec 2012
Location: Dallas, Texas
Posts: 2,154
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The cats should be covered under the emission warranty. When the dealer tells you crap like that, ask them to show it to you in print. They won't be able to.
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09-29-2014, 11:12 PM
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#8 |
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Drives: 2013 Summit White ZL1 Join Date: Jun 2014
Location: Peotone, IL
Posts: 106
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i didn't think that a muffler removal would cause the cats to fail at all. So my question is. Do I get JBA catless mids, or catted midpipes. I have no emission testing where I live so that isn't the issue. The issue is gonna be backpressure and or frying the exhaust valves. Input?
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09-29-2014, 11:16 PM
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#9 |
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Drives: none Join Date: Aug 2011
Location: DFW area
Posts: 1,844
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Backpressure is not an issue.
Go catless if that's what you want. |
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09-30-2014, 01:56 AM
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#10 | |
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Drives: 2013 Summit White ZL1 Join Date: Jun 2014
Location: Peotone, IL
Posts: 106
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That's what I like to hear!!! Catless ftw |
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09-30-2014, 09:15 AM
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#11 |
Drives: 18 Camaro ZL1 1LE (WILSON) Join Date: Jul 2009
Location: N.C.
Posts: 1,340
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How would no back pressue cause you to fry an exhaust valve?
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09-30-2014, 10:31 AM
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#12 |
   
Drives: '21 ZLE A10 Join Date: May 2012
Location: Mechanicsville, VA
Posts: 6,824
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold) |
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09-30-2014, 11:04 AM
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#13 |
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I Carry!
Drives: 2013 CRT ZL1 Join Date: Jul 2011
Location: Fletcher, Ok
Posts: 2,722
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how could a fuse pull cause this???? What if the fuse blew on its own...how would you know it? No dash board lights to say "Check Fuse"....lol
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09-30-2014, 11:30 AM
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#14 | |
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Drives: 2011 Camaro 2SS/RS Convertible and: Join Date: May 2014
Location: Central Texas
Posts: 1,863
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Quote:
__________________
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Currently in my Garage: 2011 Camaro 2SS/RS Convertible | 1980 Corvette Stingray | 1981 Firebird | 1968 El Camino | 2007 Crown Vic Police Interceptor | 2001 Silverado | 2001 Blazer | 1965 Chevy C-10 | 2007 Harley Softail Custom | 2013 MX-5 in Copper Red Mica | 2000 Corvette Convertible | 2010 Corvette Grand Sport | 2006 Audi A3 Turbo | 2008 BMW 328i |
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