Stealth mode?
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,857
Likes: 12,289
From: NE South Carolina
Not sure why you would want them closed at WOT as lots of other noise like the intake air flow and engine! But there is always the trick we used to get past state inspection "in the day" when we had glass packs and the bureaucrats running the inspections stations would not pass the car! We would stuff steel wool in the exhaust pipe and drill a hole in the pipe and put in a nail to keep it from coming out when the accelerator was pressed! Then when we got it passed, pull the nail and blow out the steel wool! Could do the same! The butterflies are operated by electric stepping motors and have feedback so disconnecting or blocking the movement would trip a CEL. Guess you could disconnect the mechanical linkage and let the motors turn nothing!
Last edited by JerryU; Jun 15, 2018 at 03:47 AM.
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Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,475
From: South Florida
It is not safe to got WOT with the valves closed. My 2017 Camaro SS A8 would keep them closed if I went into the dash controls and set the exhaust to stealth, but the owners manual strongly suggested against it.
I have not found a way to do the same on my 2015 C7 Z51.
I have not found a way to do the same on my 2015 C7 Z51.
Racer
Joined: May 2017
Posts: 357
Likes: 68
wouldn't the simple way is to put it in stealth mode, then crawl under the back and disconnect the butterfly electric connection?
I still don't understand why you would do it, but i don't see how this wouldn't work. Unless the default with no power to the butterfly is open.
I still don't understand why you would do it, but i don't see how this wouldn't work. Unless the default with no power to the butterfly is open.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,857
Likes: 12,289
From: NE South Carolina
^^
The valves use stepping motors and have feedback to check to see if they are operating properly. It's my understanding that disconnecting the plug will trip a CEL.
The valves use stepping motors and have feedback to check to see if they are operating properly. It's my understanding that disconnecting the plug will trip a CEL.
Last edited by JerryU; Jun 15, 2018 at 12:04 PM.