12-03-2018, 11:26 PM | #1 |
Drives: 2017 2SS Covertible Join Date: Jun 2018
Location: Orange County
Posts: 40
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DIY Stealth Mode for noisy cold start
Hi folks,
Before I get a ban from the Forum I want to say that everything started just as a game with extra parts I had in garage but at the end it worked and pretty well though I just installed the axleback Borla S-Type. I love them but during the cold start, they are quite heavy and honestly I was feeling bad for all my neighbors and their kids when I was leaving at 5 am for work. Anyways the stock exhaust too were pretty annoying at cold start. My ride has the exhaust dual tip non NPP; however I read that also who has the NPP has the same problem since during a cold start, the valves stay open for the first seconds. so, here is what I have made: Cold Start with S-Type Cold Start with the 'boxes of shame' the Videos are taken from the same distance, I just zoomed a little more on the first one. As you can hear, these crappy boxes do their job, and I have to say, they are quieter than the stock exhaust I had! I've put at the end of the post the pictures on what it's inside the boxes. I know , foam, cardboard and plastic are not really a good idea when we talk about exhaust but I wanted to test first if the idea I had in mind was actually working (I don't trust myself ). In addition, I'm going to use them only for a cold start, the gases are not so hot to damage something there. I'm just worried about the condensation and the chemicals that may damage the foam in a long term process. worst case scenario I will build a new couple, 96c the box, $9 pipes and $5 the foam sheets in case of quad tips, the box layout will change but I guess it will work anyways. thoughts? Can I still stay in the forum after sharing how crazy I am? Last edited by The Alien; 12-03-2018 at 11:46 PM. |
12-07-2018, 02:07 PM | #2 | |
Drives: 2018 Camaro 1SS 1LE Join Date: Mar 2018
Location: Maryland
Posts: 67
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Quote:
This is true if you use the mode selector and have the valves tied to the modes, but you can select "stealth" mode manually in the infotainment system and it will start with the valves closed |
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12-07-2018, 02:23 PM | #3 |
Drives: Camaro 2LT Join Date: Jun 2018
Location: Boca Raton, Fl
Posts: 282
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So this Home depot box filled with foam to a Camaro is like a silencer for a Gun
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12-08-2018, 04:41 PM | #4 |
Drives: 2019 Red Hot ZL1 1LE: 2012 RAM 2500 Join Date: Mar 2012
Location: DeRidder, LA
Posts: 711
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Yeah the last place that I lived I always would get some comments from my neighbor from when I had my 2010 with the Flowmasters on the cold starts, but since I moved to the country I don't worry about that anymore but good idea with the boxes.
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12-09-2018, 10:35 PM | #5 | |
Drives: 2017 2SS Covertible Join Date: Jun 2018
Location: Orange County
Posts: 40
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Quote:
I didn't have the chance to see an NPP by person and looking at some video I thought even the stealth mode was doing that trick. I thought they were doing in that way to prevent the cat poisoning Thanks again, more inputs today |
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12-09-2018, 10:39 PM | #6 | |
Drives: 2017 2SS Covertible Join Date: Jun 2018
Location: Orange County
Posts: 40
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Quote:
Haha yep, actually the original idea was coming from there. I know, they look horrible, for sure the car deserves a better reputation than me posting those creepy things around the world. But I can tell you they work great. I have to say it, the videos are not giving the real comparison. For real, the difference is more consistent. |
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12-09-2018, 10:42 PM | #7 | |
Drives: 2017 2SS Covertible Join Date: Jun 2018
Location: Orange County
Posts: 40
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Quote:
Honestly, I had fun working on them and my neighbors really appreciated the move, it was not asked. |
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12-10-2018, 02:08 PM | #8 |
Drives: 2018 ZL1 Join Date: Jul 2017
Location: San Jose, Ca
Posts: 135
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[QUOTE=Can I still stay in the forum after sharing how crazy I am? [/QUOTE]
Sorry. You gotta go!!
__________________
Mark E.
2018 ZL1 NGM A10 87 Grand National. Modified Hot Rod for sale *SOLD* 87 Grand National. Stock 65 Olds Vista Cruiser wagon Grand National motor/tran 66 Bronco Rockbuggy 2006 Dodge 2500 4x4 Cummins 6 speed |
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