Jump to content

Exhaust Adaptive Valve

MotoMedic

By MotoMedic
in Engines & Drivetrain

 Share

Recommended Posts

tnchevy Senior Enthusiast

tnchevy

Posted
Posted

Back pressure is not always a bad thing, you could lose low end power by opening an exhaust too much.

  • Replies 140
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

CorvetteOJ
CorvetteOJ

Hey Medic, when I read your post, I immeidately remembered when I was a kid, (teenager) guys would stick raw potatoes on the end of someone's exhaust pipe, and in most cases, would get the same effect

iCryWheniGoPoop
iCryWheniGoPoop

What Dave said... whats it going to hurt anyway, just put a $2 hose clamp on it for now and see if you like it. If you don't... crawl back underneath it and take 30 seconds to pull it back off. Its ha

45acp
45acp

I like the hose clamp idea. Cheap and easy to try and if you don't like it take it off.   DJ

Posted Images

brwk Enthusiast

brwk

Posted
Posted

Do the 2016s have the squeak? Or did they remove/re-design the flapper?

  • 3 months later...
armyman22 Enthusiast

armyman22

Posted
Posted

Reviving an old thread here as my dealership just replaced my exhaust today with what is supposed to be an updated part. They said the new part was just released a couple of weeks ago and they've only done 1 other truck with this new part. Time will tell I guess.

 

Sent from my SM-N910V using Tapatalk

ChevyRoofer Senior Enthusiast

ChevyRoofer

Posted
Posted

Reviving an old thread here as my dealership just replaced my exhaust today with what is supposed to be an updated part. They said the new part was just released a couple of weeks ago and they've only done 1 other truck with this new part. Time will tell I guess.

 

Sent from my SM-N910V using Tapatalk

Picture of the new part?

armyman22 Enthusiast

armyman22

Posted
Posted

Picture of the new part?

It's been raining here and bad storms today so I haven't been able to crawl under the truck and look for myself. I was told it's just the internals that are different though so if that's the case there's nothing to show.

 

Sent from my SM-N910V using Tapatalk

  • Like 1
Badass69 Senior Enthusiast

Badass69

Posted
Posted

It's a butterfly valve with a spring attached to it..... there isn't a whole lot they can "change" to make it any different lol. Unless they have better bushings for it to ride in or something so it has less chance of binding.

armyman22 Enthusiast

armyman22

Posted
Posted

It's a butterfly valve with a spring attached to it..... there isn't a whole lot they can "change" to make it any different lol. Unless they have better bushings for it to ride in or something so it has less chance of binding.

Yeah that's my thought too. I don't have a whole lot of confidence that it won't start again but time will tell. The GM Borla system also uses the valve and I haven't heard any complaints with that system.

 

Sent from my SM-N910V using Tapatalk

TJay74 Senior Enthusiast

TJay74

Posted
Posted

Upgraded part, best upgrade it to cut it out and dump it.

  • 2 years later...
pmot1200 Enthusiast

pmot1200

Posted
Posted

The flapper on my 2017 , 5.3, ext cab started making a noise at start up recently. 3500 miles on the truck. After reading this and other posts I decided to clamp it to full open position by taking a piece of aluminum sheet metal(about 1/16”) , cutting to 1.25” wide x 4.25” long, wrapping around the valve and securing with 2 hose clamps to the full open position. Noise at idle is gone and no humming or helicopter noise during 4cly mode while driving. 

Might be a dumb question....can someone confirm that full rotation to stop 

in clockwise direction (facing the val ve,  from pass side, muffle to the left,)against the spring is in fact the full open position? 

BigBlueLB756 Senior Enthusiast

BigBlueLB756

Posted
Posted

I've tried 90 degrees clockwise and 90 counter-clockwise and can tell no difference.

I'm counter-clockwise for now.

 

 

182337-0781638a757049815f22f3a8dc72e44b.jpg

M1ck3y Senior Enthusiast

M1ck3y

Posted
Posted

Has anyone removed this? I'm interested to see if it has an effect on exhaust volume or if its just there for v4 drone.

  • 3 weeks later...
UnlimitedMatt Enthusiast

UnlimitedMatt

Posted
Posted

I just realized mine has a nice rattle to it when idling. 

 

Has it been figured out what the best thing to do with these is?  Remove, modify or leave alone?  

pmot1200 Enthusiast

pmot1200

Posted
Posted

The easy solution for me was to clamp the valve in full open position. No more rattle noise and no v4 drone either. I used a portable scope to run through the exhaust ( removed clamp near flex coupling) to verify the full open position of the adaptive valve. See pics. Full open, normal (mostly closed) and full ccw. 

5915F715-D775-40A0-BAAF-65D31831C6CB.jpeg

4250D5CC-E883-4E21-9C76-ABB4E4A3205C.jpeg

D75E3A7F-30DA-4D1A-AA1E-4287525800B9.jpeg

D4DCB573-A20B-4A9B-989C-666CD84B8536.jpeg

  • Like 1
roadkill5.3 Enthusiast

roadkill5.3

Posted
Posted

When the truck is running, turn the valve. You’ll hear restriction then turn the opposite way, no restriction.  It’s not difficult.  You can hear when it’s open or closed...

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Grumpy Bear
      Slate Electric Truck

      By Grumpy Bear · Posted

      https://reotrucks.com/
    • Grumpy Bear
      Gas Prices

      By Grumpy Bear · Posted

      So you're saying toss the baby out with the bathwater? @txab posted article was her take on how AI can be used to manipulate pricing as it already does and has been rebuked by the judiciasry in housing. How AI can be and is used to maximize refinery or even Amazon operations all of which are true but because she is who she is; that makes what she says about what is true, false? Is that something akin to Pre-justice aka prejudice?    Look, I'm first in line to approach all information with caution just because we live in a world where people like to lie about someone or something with such a straight face and in such volume that it makes digging to the truth wearisome. Meaning I understand the skepticisms but if I were to toss out everything a person is for a view they hold then my pool of people to draw wisdom from would be non-existent and I'd be forced to reinvent the wheel daily. Not practical.    "Be innocent as a dove but as cautious as a serpent."    Test each word. Every good lie is part truth or no one would believe it. Find the truth in it and reject what isn't.    On this one, AI is being used to do what has been done by hand for hundreds of years already but at such speed, the point of a computer, that it is more easily monetized. This one wasn't that hard a lift.    I wrote a few formulas in a Lotus 123 program decades ago, a series of linked Macros actually, that allowed a daily inventory to be turned into a running P&L and production plan. Something that took three departments a week to assemble now took the time it takes to input the 'daily changes' in inventory. Later that was ungraded to the more powerful Excel program an and integrated with bar code scanning, inventory to supply was done once per shift. It had a huge impact on production scheduling, Seamless interruption flexibility, inventory error reduction, raw materials cost effective utilization and scrap reduction. Huge improvement in the bottom line. I spent months on that and AI could have done it in minutes. So yes, it not only can be used, they would be foolish to not try. The legality, ethics and morality are not the domain of AI. Humans need to keep a reign on it. 
    • ballencd
      How to Tune 6L80 Silverado transmission

      By ballencd · Posted

      New to this forum.  Also looking to tune a 6L80 and trying to work out all the issues in my transmission swap.  I have a 6.2 diesel (1983) and have removed the TH-400 and about to put in a 6L80 with a TCM-2600 interface and don't have a clue what I doing after that.  Did you (Leatherneck/RAV3) get your slip resolved? I too hate to spend that kind of money on a tuner that hopefully I will not need too many times although from what steelerdude15 added about the HP Tuner being great for diagnostics would be a plus.  I am also from WNC but below you in Columbus.  Any helo would be greatly appreciated.  
    • KARNUT
      Gas Prices

      By KARNUT · Posted

      Sounds like a smart reasonable person with common sense. Bill O’Riley never said he was just a journalist, by the way.
    • Atlas
      Gas Prices

      By Atlas · Posted

      It's like saying Bill O'Reilly is "just" a journalist.         Lauren Fix, widely known as "The Car Coach," is a prominent automotive journalist, television personality, and self-identified conservative. She is a frequent contributor to right-leaning networks and platforms, offering commentary that intersects the automotive industry, consumer economics, and conservative political perspectives. [1, 2, 3] Media and Commentary Network Contributions: Fix serves as the National Automotive Correspondent for Newsmax and is a frequent guest on Fox News and Fox Business. Video Platforms: She has contributed to PragerU, where she has hosted videos critiquing government mandates on vehicles. [1, 2, 3] Core Positions Anti-EV Mandates & Fuel Policies: Fix regularly critiques government subsidies and mandates for electric vehicles (EVs), framing them as impractical and burdensome to the average consumer. She advocates for consumer choice and supports traditional internal combustion engine vehicles. [1, 2, 3] Economic Analysis: Her commentary often emphasizes the impacts of fuel prices, inflation, and federal regulations on drivers. [1, 2, 3] Political Alignment: On her public channels, she actively supports deregulation, "drill baby drill" energy policies, and the removal of government restrictions on auto sales and manufacturing. [1, 2] For analysis from Lauren Fix on how consumer automotive choices can align with political leanings:

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...