04-19-2017, 11:02 PM | #1 |
Drives: 2016 2SS MRC,NPP, A8 hyper blue Join Date: Sep 2014
Location: New York NY
Posts: 42
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SECONDARY CAT DELETE QUESTIONS
So I've decided to get my secondary cats deleted and I found a video on YouTube of what I think and hope it will sound like. So if I delete the secondary cats on my car, will I experience drone or anything else unusual? I'd like to hear some input that would be greatly appreciated!
https://m.youtube.com/watch?v=fNhhWql9Nv4 |
04-20-2017, 11:04 AM | #2 | ||
Drives: 2016 2SS MRC,NPP, A8 hyper blue Join Date: Sep 2014
Location: New York NY
Posts: 42
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04-20-2017, 03:37 PM | #3 |
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Drone will depend on the mufflers you go with, if you are keeping the stock NPP and just doing secondary cat delete it won't change drone, you will just get a little bit more volume out of it and what people describe as a little more of a raspy exhaust note.
I have all of my cats but went aftermarket with the Borla S Type with Mid Pipes (that go up to a few inches behind the secondary cats) and when I hear the same set up with the secondary cat delete and it's only about 15% louder on WOT and a little bit raspier in sound. |
04-20-2017, 10:09 PM | #4 |
No Drone. Nothing unusual. Same sound as stock just maybe 10-20% louder
Heres a clip of my car after I took out my rear cats. everything else is stock! https://www.instagram.com/p/BLrn01TgEuw/ |
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04-21-2017, 12:11 AM | #5 | |
Drives: 2016 2SS MRC,NPP, A8 hyper blue Join Date: Sep 2014
Location: New York NY
Posts: 42
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04-21-2017, 06:26 AM | #6 |
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It just depends on what type of sound you are trying to get, if you delete the secondarys and the muffler latter, you'll have a very loud, raw, and raspy sounding exhaust. I went with after market because I needed to be able to turn the loud on and off.
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04-23-2017, 09:51 PM | #7 |
Drives: 2017 2SS Join Date: Apr 2017
Location: Jackson MS
Posts: 15
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I wonder if there is a loss in power if secondary cats get deleted...
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04-23-2017, 10:26 PM | #8 |
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Why would there be a loss? They are only there to pass CA emissions.
__________________
Current: '17 2SS Hyper Blue, A8, MRC, NPP
Past: '99 SS Camaro A4, '73 Camaro 383 A3 "Voices in your head are not considered insider information." 3800 Status - 6/16/16 (Built!) 6000 status - 6/29/16 (Delivered!) |
04-24-2017, 07:04 AM | #9 |
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If you increase exhaust diameter without a tune, you can get a loss of low end torque because there's not enough back pressure, but I highly doubt any significant/noticeable loss with a secondary cat delete. Most people do the delete purely for the added sound.
You'd probably see low end power losses if you went to something like 2" headers with a full 3" exhaust and no tune, but not for something like a secondary cat delete. |
04-24-2017, 08:17 AM | #10 | |
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__________________
Current: '17 2SS Hyper Blue, A8, MRC, NPP
Past: '99 SS Camaro A4, '73 Camaro 383 A3 "Voices in your head are not considered insider information." 3800 Status - 6/16/16 (Built!) 6000 status - 6/29/16 (Delivered!) |
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04-24-2017, 09:02 AM | #11 |
Drives: 2016 Camaro SS Join Date: Oct 2016
Location: Mount Dora, FL
Posts: 792
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Why does the myth of back pressure keep on living? You do not want back pressure... not even a little.
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04-24-2017, 07:27 PM | #12 |
Drives: 2017 Hyper Blue Camaro 2SS Join Date: Aug 2016
Location: Grayling Michigan
Posts: 90
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back pressure is good....in a 2 stroke dirt bike!!
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04-25-2017, 09:34 AM | #13 |
Drives: 2016 2SS Join Date: Oct 2016
Location: NYC/CT
Posts: 85
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Can anyone attest to how much louder it is from inside the car? I plan to cut mine out in the next week or two. My blowoff valve is louder than my exhaust from inside the car (sounds like driving through a puddle) when driving below 20mph and I want to hear more exhaust and less air whooshing around. I plan to do primary deletes too next month so hopefully both will take it to the volume I want inside the car!
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2016 Camaro SS- , D1SC, 4.38" pulley, LT4 HPFP
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04-25-2017, 10:26 AM | #14 | |
Drives: 2016 2SS Join Date: Oct 2016
Location: NYC/CT
Posts: 85
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2016 Camaro SS- , D1SC, 4.38" pulley, LT4 HPFP
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